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Tytuł:
Activity of phosphofructokinase and phosphoenolopyruvate carboxylase in Norway maple (Acer platanoides L.) seeds during dormancy breaking
Autorzy:
Krawiarz, K
Szczotka, Z.
Powiązania:
https://bibliotekanauki.pl/articles/41615.pdf
Data publikacji:
2002
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
phosphoenolopyruvate carboxylase
dormancy breaking
glucose
activity
sucrose
phosphofructokinase
Norway maple
Acer platanoides
seed
Opis:
We analysed changes in the activity of phosphofructokinase (PFK) and phosphoenolopyruvate carboxylase (PEPC), and in the glucose and sucrose contents of Norway maple seeds stratified at 3°C (dormancy broken) or treated at temperature 15°C (dormancy not broken). We found that changes in the activity of enzymes are not linear, and 2-3 stages may be distinguished. Dormancy breaking and seed germination is associated with a high activity of PFK and PEPC, and a high glucose level in embryo axes.
Źródło:
Dendrobiology; 2002, 47
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Breaking of seed dormancy, germination and seedling emergence of the common hawthorn (Crataegus monogyna Jacq.)
Autorzy:
Bujarska-Borkowska, B
Powiązania:
https://bibliotekanauki.pl/articles/41072.pdf
Data publikacji:
2002
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
stratification
Crataegus monogyna
common hawthorn
scarification
breaking
seedling emergence
hawthorn
germination
seed dormancy
Opis:
The most advantageous time for collecting fruits of the common hawthorn (Crataegus monogyna Jacq.) falls on October, when they are fully ripe. The stones extracted from the fruits must be dried at room temperature to the moisture content of about 10%. The dormancy of the common hawthorn seeds can be overcome by their stratification in a moist medium in one of the three thermal regimes: - 25°/3°C (16 weeks at 25°C followed by 15-18 weeks at 3°C, i.e. to the time when the first seedlings start to appear) - 20~30°/3°C (16 weeks at 20~30°C (16+8 hrs/day) followed by 15-18 weeks at 3°C, i.e. to the time when first seedlings start to appear) - 20~30°/3°C (16 weeks at 20~30°C (24+24 hrs) followed by 15-18 weeks at 3°C, i.e. to the time when first seedlings start to appear) Having been stratified, the seeds germinate vigorously (in 3-5 weeks) and at a high percentage at temperatures of 3~10°, 3~15°, 3~20° and 3~25°C, (16+8 hrs/day) and the seedlings emerge at 3~20°C (16+8 hrs/day) in 4-6 weeks. Storage for one year at -3°C in the case of the seeds dried after harvest to the moisture content of 10% does not reduce their germination capacity. Stones scarification in concentrated sulphuric acid for 120 minutes followed by stratification at 3°C has an adverse effect on seed emergence at the temperature 3~20°C (16+8 hrs/day). It is recommended that stratified seeds should be sown into the still cool soil at the end of March or the beginning of April, as the increased temperature induces the secondary dormancy in seeds.
Źródło:
Dendrobiology; 2002, 47 Supplement
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Breaking of seed dormancy in Iris suaveolens Boiss. et Reuter under in vitro conditions
Autorzy:
Hajyzadeh, M.
Yildirim, M.U.
Mokhtarzadeh, S.
Sarihan, E.O.
Khawar, K.M.
Powiązania:
https://bibliotekanauki.pl/articles/12680343.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Tematy:
Iris suaveolens
ornamental plant
seed dormancy
dormancy breaking
in vitro condition
Opis:
Iris species have great economic importance for their use in ornamental and pharmaceutical industry. Flora of Turkey reports about 43 local taxons of which 16 are endemic. Iris suaveolens Boiss. et Reuter is an endemic species with high seed dormancy and has high tolerance to cold and drought. This study focused on seed dormancy break of I. suaveolens under in vitro conditions. In the first experiment, the seeds were given stratification treatment on MS medium containing different concentrations of BAP with or without NAA. The 2nd experiment reports effects of alternative combinations of cold (at 4°C, 24 h dark) – warm (16 h light photoperiod) conditions on medium containing different concentrations of plant growth regulators on agar solidified MS medium. Both experiments showed about 8.33% seed germination against 64.5% seed viability as confirmed by tetrazolium test. All germinating seeds were abnormal and very weak. In the third experiment, 10 minutes acid scarified seeds cultured at 24°C in 16 h light photo period on MS medium achieved 60.0% germination. Similar treatment under cold + dark condition was inhibitory and failed to show identical results. This underlines the importance of acid scarification, photoperiod and warm treatments of I. suaveolens seeds to break seed dormancy. All germinated seeds showed normal growth and development under field conditions.
Źródło:
Acta Scientiarum Polonorum. Hortorum Cultus; 2019, 18, 4; 15-24
1644-0692
Pojawia się w:
Acta Scientiarum Polonorum. Hortorum Cultus
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Breaking seed dormancy and micropropagation of perennial vulneraria milkvetch (Astragalus vulnerariae DC.)
Autorzy:
Dilaver, Z.
Mirzapour, M.
Kendir, H.
Powiązania:
https://bibliotekanauki.pl/articles/11855237.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Opis:
In this study, an efficient system to break seed dormancy and plant regeneration was established for perennial vulneraria milkvetch (Astragalus vulnerariae DC.). The seed coat dormancy could be easily released using 40% sulphuric acid treatment for 15 minutes, which made the seed coat permeable without damaging zygotic embryos. The tissue culture studies reported regeneration on 5 explants, which had variable effects on shoot regeneration, using MS medium containing variable concentrations of Kin–NAA and BAP–NAA. Maximum shoot regeneration of 86.67% with 4.47 shoots per explant was noted on MS medium containing 0.5 mg·l–1 Kin – 0.5 mg·l–1 NAA on hypocotyl explants. No shoot regeneration was noted on cotyledon leaf and shoot nodes using MS medium containing any concentration of BAP–NAA. Maximum shoot regeneration of 50% with 3 shoots per explant was also observed on 1 mg·l–1 BAP – 0.5 mg·l–1 NAA on epicotyl explants. MS medium containing Kin–NAA induced hypocotyl explant shoots had rooting percentage of 36.67% on 0.5 mg·l–1 IBA, whereas, MS medium containing BAP–NAA induced hypocotyl shoots had rooting percentage of 46.67%. The in vitro cultured plants had an acclimatization rate of 78%. Aesthetically attractive, economical, easy to maintain and water efficient vulneraria milkvetch is currently not available in landscaping. The system of plant regeneration and adaptation suggested by this paper may help to dissipate it to a broad range of water scarce environments as a sustainable and inexpensive choice.
Źródło:
Acta Scientiarum Polonorum. Hortorum Cultus; 2017, 16, 4; 79-88
1644-0692
Pojawia się w:
Acta Scientiarum Polonorum. Hortorum Cultus
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Breaking seed dormancy of Astragalus penduliflorus Lam.
Autorzy:
Dziurka, K.
Skrzypek, E.
Dubert, F.
Powiązania:
https://bibliotekanauki.pl/articles/56930.pdf
Data publikacji:
2019
Wydawca:
Polskie Towarzystwo Botaniczne
Opis:
Astragalus penduliflorus Lam. is an alpine-subalpine species. Several isolated populations occur in Europe: in the Alps, Pyrenees, Carpathians and in central Sweden. Astragalus penduliflorus is considered as critically endangered species in Poland, growing only at the locality in the Smytnia Valley, in the Western Tatra Mountains. The population is at risk, due to the limited reproduction caused by law rate of seed germination, periodically shortened vegetation period that prevent seed development and gnawing the aerial plant parts by deer. The aim of the study was to explain the reason for the poor germination of A. penduliflorus seeds. As a result of mechanical scarification, 100% of A. penduliflorus seeds germinated, which proved that these seeds are characterized by a water-impermeable seed coat, which classified them as hard seeds that go through physical dormancy. Results obtained in this work can be used for effective reproduction and active conservation of threatened A. penduliflorus.
Źródło:
Acta Societatis Botanicorum Poloniae; 2019, 88, 1
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Charakterystyka nowych odmian ziemniaka pod względem możliwości przerywania spoczynku bulw
New potato cultivars characterized in regard to dormancy breaking of tubers
Autorzy:
Wróbel, Sławomir
Robak, Barbara
Powiązania:
https://bibliotekanauki.pl/articles/2198693.pdf
Data publikacji:
2014-06-30
Wydawca:
Instytut Hodowli i Aklimatyzacji Roślin
Tematy:
daminozyd
giberelina
spoczynek bulw
tiomocznik
ziemniak
dormancy
gibberellic acid
new cultivars
potato
thiourea
Opis:
W badaniach oceniano możliwość przerwania spoczynku bulw nowych odmian ziemniaka bezpośrednio po zbiorze na potrzeby próby oczkowej. Znajomość tej cechy odmianowej w istotny sposób usprawnia wykonywanie prób oczkowych we wczesnych terminach — tuż po zbiorach. Przebadano 23 odmiany (Bogatka, Boryna, Danuta, Etiuda, Eurostar, Gwiazda, Hermes, Honorata, Hubal, Ignacy, Igor, Innovator, Jubilat, Jurata, Jurek, Kaszub, Lavinia, Malaga, Mondeo, Oberon, Riviera, Sylvana, VR 808). Bulwy do badań pobierano z poletek zgodnie z urzędowymi terminami pobierania prób do badań weryfikacyjnych. Do przerywania spoczynku wykorzystano metodę polegającą na 15 minutowym moczeniu wycinków bulw w wodnym roztworze gibereliny, tiomocznika, Biseptolu 480 (sulfamethoxazolum, trimethoprimum) i daminozydu (B-Nine 85 SP). Większość badanych odmian miała relatywnie łatwy do przerwania spoczynek. U odmian Boryna, Hermes i Sylvana był on nieco trudniejszy pod tym względem w niektórych latach, dlatego korzystne jest przesunięcie zabiegu przynajmniej o 2–3 tygodnie po zbiorze. Do odmian, których spoczynek przerwać trudno, należą Hubal i Etiuda. Dla nich procedurę należy rozpoczynać znacznie później — nie wcześniej niż po 5 tygodniach od pobrania próby z pola. Zbyt wczesne przerywanie spoczynku tych odmian powodowało kiełkowanie jedynie około 36–64% wycinków bulw. Nie stwierdzono korelacji pomiędzy długością okresu spoczynku poszczególnych odmian a trudnością jego przerywania, jednak analizując poszczególne grupy wczesności, zaobserwowano znaczną ujemną współzależność (r = -0,66) w grupie odmian średnio wczesnych, co wskazuje, że dłuższy spoczynek u tych odmian jest relatywnie łatwiejszy do przerwania.
Presented studies evaluated the effectiveness of breaking the tuber dormancy immediately after harvest for new potato varieties, as a part of procedure of the grow-out test. Knowledge of this varietal characteristics significantly improves the performance of the grow-out test executed right after harvest. Examined varieties (23) were following: Bogatka, Boryna, Danuta, Etiuda, Eurostar, Gwiazda, Hermes, Honorata, Hubal, Ignacy, Igor, Innovator, Jubilat, Jurata, Jurek, Kaszub, Lavinia, Malaga, Mondeo, Oberon, Riviera, Sylvana, VR 808. Tuber samples were collected from the plots according to the official schedule of tuber sampling for virus indexation. To break the dormancy, eye-plugs were soaked for 15 min in aqueous solution of gibberellic acid, thiourea, Biseptol 480 (Sulfamethoxazolum, Trimethoprimum) and daminozide (B-Nine 85 SP). For most of the studied cultivars it was relatively easy to break the dormancy. In the case of cultivars Boryna, Hermes and Sylvana, breaking was slightly more difficult, therefore, it is preferable to shift the treatment to at least 2–3 weeks after harvesting. Cultivars Hubal and Etiuda required at least 5 weeks of resting for efficient dormancy breaking. For these cultivars sprouting occurred only for 36–64% eye-plugs if dormancy was broken too early. There was no correlation between the length of the resting period of each variety and difficulty of the dormancy breaking. However, when analyzed by different groups of maturity significant negative correlation was observed (r = -0.66) in the medium early cultivars indicating that a longer resting period in these varieties is relatively easier to break.
Źródło:
Biuletyn Instytutu Hodowli i Aklimatyzacji Roślin; 2014, 272; 93-101
0373-7837
2657-8913
Pojawia się w:
Biuletyn Instytutu Hodowli i Aklimatyzacji Roślin
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Chemical applications affected dormancy breaking in ‘Modi’ apple cultivar under subtropical conditions
Wpływ czynników chemicznych na przerwanie stanu uśpienia jabłek odmiany Modi w warunkach subtropikalnych
Autorzy:
İmrak, B.
Küden, A.B.
Küden, A.
Sarıer, A.K.
Çimen, B.
Powiązania:
https://bibliotekanauki.pl/articles/11543449.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Opis:
The winter chill is essential for most fruit crops. Fruit trees require a certain number of chill hours, also called chill units, each winter to produce fruits in the next summer. Insufficient chilling accumulation during winter period usually results in blooming disorders and decreases the fruit yield of deciduous fruit trees. Dormancy can be broken by using chemicals, such as Dormex. In recent years Dormex has been forbidden in some countries, including Turkey since it was found to be carcinogenic to human beings. This situation raised a necessity to find alternative chemicals to Dormex to be used in subtropical climate regions. For this purpose, six years old trees of ‘Modi’ apple scions (Malus sylvestris, Mill) grafted on Malling-Merton M9 rootstocks were sprayed with 6% Erger (total nitrogen, 15.0%; ureic nitrogen, 6.1%; nitric nitrogen, 5.8%; ammoniacal, 3.1%; water soluble calcium oxide, 4.7%), hydrogen cyanamide 4% (Dormex) and potassium nitrate 8% (KNO3 ) for breaking dormancy of the buds during 2011–2013. Calculating the chilling hours below 7°C and chill unit (CU) values during the experimental winter periods, 497 to 828 h and 357 to 467 CU of chilling durations were obtained under subtropical conditions of Adana (36°56 12'04''N. 35° 33'53.46''E ). Modi broke endodormancy of the buds on 20 February 2012 with the accumulation of 375 CU and 550 h. The effects of dormancy breaking agents on bud break, fruit set and fruit quality were investigated. Erger markedly advanced bud-break and increased the final fruit set, quality and yield in comparison with the other treatments and control.
Chłód zimowy jest istotny dla większości owoców. Drzewa owocowe wymagają pewnej liczby godzin chłodnych (jednostkek chłodu) każdej zimy, aby wyprodukować owoce następnego lata. Niewystarczająca kumulacja ochłodzenia podczas zimy zwykle powoduje zaburzenia w kwitnieniu oraz zmniejsza plon owoców liściastych drzew owocowych. Okres uśpienia można przerwać przy użyciu środków chemicznych, takich jak Dor mex. W ostatnich latach Dormex został zakazany w niektórych krajach, łącznie z Turcją, gdyż stwierdzono jego rakotwórczy wpływ na ludzi. Sytuacja ta wywołała konieczność znalezienia alternatywnych środków chemicznych do zastosowania w subtropikalnych regionach. W tym celu sześcioletnie drzewa jabłoni ‘Modi’ (Malus sylvestris, Mill) zaszczepione na podkładkach Malling-Merton M9 w latach 2011–2013 opryskano 6% Ergerem (całkowity azot – 15.0%; azot mocznika – 6.1%; azot azotanowy – 5.8%; amoniak – 3.1%; tlenek wapnia rozpuszczalny w wodzie – 4.7%), cyjanamidem wodoru 4% (Dormex) i azotanem potasowy 8% (KNO3 ), aby przerwać okres uśpienia pąków. Obliczono godziny chłodu poniżej 7°C oraz wartości jednostek chłodu (CU) podczas eksperymentalnych okresów zimowych w warunkach subtropikalnych w Adana (36°56 12'04''N. 35° 33'53.46''E ), otrzymując 497 do 828 godzin i 357 do 467 CU. Okres uśpienia pąków jabłoni ‘Modi’ został przerwany 20 lutego, przy kumulacji 375 CU i 550 godzin. Badano wpływ środków przerywających uśpienie na pąki, zawiązki i jakość owoców. Erger zdecydowanie przyspieszał pękanie pąków i zwiększał ostateczne zawiązywanie owoców oraz plon w porównaniu z innymi środkami i z kontrolą.
Źródło:
Acta Scientiarum Polonorum. Hortorum Cultus; 2016, 15, 6; 265-277
1644-0692
Pojawia się w:
Acta Scientiarum Polonorum. Hortorum Cultus
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dormancy breaking and seed germination of the annual weeds Thlaspi arvense, Descurainia sophia and Malcolmia africana (Brassicaceae)
Autorzy:
Karimmojeni, H.
Taab, A.
Rashidi, B.
Bezrafshan, A.H.
Powiązania:
https://bibliotekanauki.pl/articles/66908.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
seed dormancy
seed germination
annual plant
weed
Thlaspi arvense
Descurainia sophia
Malcolmia africana
African mustard
Brassicaceae
Opis:
In Iran, Descurainia sophia, Malcolmia africana, and Thlaspi arvense are abundantly found as importunate weeds in winter cereal. Understanding the timing of seed germination under natural conditions is crucial for learning how to manage these annual weeds. Therefore, this study was conducted to evaluate the effect of soil burial, dry storage, cold stratification, KNO3, GA3, and scarification on the seed dormancy and germination of these three species. Species had significantly different responses to the treatment. In D. sophia, seeds buried at a depth of 10 cm for 60 days (55%), and seeds dry stored at 20°C for 180 days (45%) showed the highest level of germination. In M. africana, the germination percentage reached 95% when seeds buried at a depth of 1 cm were soaked in a GA3 concentration of 150 ppm. T. arvense had the lowest level of germination compared to the other species. The highest percentage of T. arvense germination was obtained in seeds treated with 150 ppm GA3. Potassium nitrate partly increased germinability in seeds of M. africana, which initially were less dormant than those of T. arvense and D. sophia.
Źródło:
Journal of Plant Protection Research; 2014, 54, 2
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dormancy breaking, germination, and seedling emergence from seeds of Crataegus submollis
Autorzy:
Bujarska-Borkowska, B
Powiązania:
https://bibliotekanauki.pl/articles/41762.pdf
Data publikacji:
2007
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
hawthorn
Crataegus submollis
seed
seedling emergence
germination
dormancy breaking
stratification
scarification
desiccation
storage
Opis:
Effects of several stratification variants on seed dormancy breaking were compared in Crataegus submollis Sarg. (hairy cockspur-thorn or Quebec hawthorn). Ripe seeds were collected (in October), cleaned, and dried to a moisture content of 7–12%. Seed dormancy in this species was broken most effectively by warm-cold stratification of nutlets, in a substrate or without any substrate, at 15~25°/3°C or 20~30°/3°C, i.e. with a cyclically alternating warm stage (16+8 hrs or 24+24 hrs/cycle) lasting 16–20 weeks, followed the cold stage lasting ca. 20 weeks, i.e. till the appearance of the first germinating seeds. After stratification, emergence rate is equally high (ca 50%) at cyclically alternating temperatures of 3~15°C and 3~20°C (16+8 hrs). Chemical scarification of nutlets in 96% sulphuric acid for 3 hrs, followed by warm-cold stratification at 20~30°/3°C, with a short, 4-week warm stage, also ensures a high emergence rate (58%). Seed desiccation (in nutlets) slowly to a moisture content of 10–12%, after stratification in a substrate or without any substrate as well as after scarification, results in a reduced emergence rate, especially if seeds are dried to the lower moisture content. Seed storage (in nutlets after drying to a moisture content of 10%) for 10 years at –3°C, does not decrease the emergence rate (93%) after stratification at 20~30°/3°C in a substrate, with a cyclically alternating warm stage (24+24 h) lasting 16 weeks.
Źródło:
Dendrobiology; 2007, 58; 9-15
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dormancy breaking in Savin juniper [Juniperus sabina L.] seeds
Autorzy:
Tylkowski, T
Powiązania:
https://bibliotekanauki.pl/articles/56737.pdf
Data publikacji:
2010
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
stratification
dormancy breaking
seed dormancy
seedling
propagation
Savin juniper
shrub
natural stand
Pieniny Mountains
Juniperus sabina
seed
vegetation season
Opis:
Savin juniper (Juniperus sabina L.) is a relict shrub in Poland with only one natural stand in Pieniny Mts. Se- eds require warm followed by cold stratification to overcome dormancy. Application of temperature regime at 20°/3°C layout, for 14 and 17 weeks respectively, is more effective than stratification at 15°/3°C. Interruption of warm stratification phase after 7 weeks and seeds drying at room temperature for 3-days with warm stratification follow-on resulted in increasing of germination capacity from 25% to approximately 45%. Germinated seeds pricked to substrate into containers gave seedlings 3 cm high when cultivated under plastic tunnel in the first vegetation season.
Źródło:
Acta Societatis Botanicorum Poloniae; 2010, 79, 1; 27-29
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of scarification on breaking seed dormancy and germination enhancement in Annona muricata L. (Magnoliales: Annonaceae)
Autorzy:
Dada, C. A.
Kayode, J.
Arowosegbe, S.
Ayeni, M. J.
Powiązania:
https://bibliotekanauki.pl/articles/1075444.pdf
Data publikacji:
2019
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Annona muricata
Annonaceae
Dormancy
germination
scarification
Opis:
The effect of various scarification method on breaking seed dormancy and germination enhancement in Annona muricata (Magnoliales: Annonaceae) was examined in this study via: mechanical scarification with sandpaper, file and stone; chemical scarification with 10, 25 and 50% H2SO4 for 5 seconds respectively; exposure to wet heat (hot water) for 1, 3 and 5 seconds; exposure to cold treatment by chilling in refrigerator of 4 ºC for 12, 18 and 24 hours; soaking in coconut water for 5, 10 and 15min and untreated seeds as the control. The results of the experiment showed that chemical scarification with H2SO4 at 50% for 5 seconds had significantly highest percentage germination (60%). This was followed by the seeds soaked in coconut water for 15 minutes (39.69). Seeds treated with 25% H2SO4 for 5 seconds had 30% germination. Other treatment were less or not effective. Untreated seeds had the least percentage germination (6%) with mean germination time of 40.20 and germination index of 0.27. The treatments that gave significantly higher germination percentages also produce low Mean Germination Time (30.01) and increased Germination Index (12.26). These characters shows that chemical scarification with H2SO4 at 50% for 5 seconds was the most effective treatment to break dormancy and enhancing seed germination in this species as revealed in this study.
Źródło:
World Scientific News; 2019, 126; 136-147
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of dormancy breaking in stored seeds on germinability and seedling emergence of Tilia platyphyllos
Autorzy:
Tylkowski, T
Powiązania:
https://bibliotekanauki.pl/articles/41170.pdf
Data publikacji:
2006
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
dormancy breaking
seed
stored seed
germinability
seedling emergence
Tilia platyphyllos
scarification
stratification
seed viability
Opis:
Fruits of large-leaved lime dried to 10% may be stored for 16 years in sealed containers at –3°C without loosing seed viability. Dormancy of seeds, extracted from hard fruit coats, may be released after chemical scarification in concentrated sulphuric acid for 10 minutes, followed-by stratification without any medium (chilling) at the temperature of 3°C, for 20–24 weeks, i.e. until the first seeds start to germinate. After such pretreatment, during the germination test conducted at alternating temperatures 3~15°C (16 + 8 hours/day) seeds germinate near 90% in several weeks. For seedling production scarified and stratified seeds should be sown in early spring into trays under a plastic tunnel which ensures a high percentage of seedlings emergence. Sowing of the pretreated seeds in spring in a open nursery gives poor results.
Źródło:
Dendrobiology; 2006, 56; 79-84
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of dormancy-breaking treatments on seed germination of Koelreuteria paniculata and Mahonia aquifolium
Autorzy:
Pipinis, E.
Mavrokordopoulou, O.
Milios, E.
Diamanta, A.
Kotili, I.
Smiris, P.
Powiązania:
https://bibliotekanauki.pl/articles/41459.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Opis:
The present paper examines the germination requirements of the seeds of two woody species (Koelreuteria paniculata and Mahonia aquifolium). Koelreuteria paniculata seeds were subjected to a combination of acid scarification, gibberellic acid (GA3) and cold stratification treatments. Un-scarified seeds, which were only cold stratified (up to 3 months) as well as the seeds which were only acid-scarified (up to 60 minutes) exhibited low germination percentages. The combination of sulphuric acid scarification and cold stratification treatments significantly improved germination. In acid-scarified seeds, GA3 application improved germination, but did not fully replace the cold stratification period required to break seed dormancy. Mahonia aquifolium seeds were subjected to a combination of GA3 and cold stratification treatments. Notably, prolonged cold stratification is essential for the germination of M. aquifolium seeds since seeds stratified for 1 or even 2 months did not germinate. In almost all cases, the percentage of M. aquifolium seeds germinated was higher with GA3 treatment applied prior to cold stratification than with cold stratification only.
Źródło:
Dendrobiology; 2015, 74
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Expression of abscisic and gibberellic acid signalling factors in Fagus sylvatica L. seeds during dormancy breaking and germination
Autorzy:
Staszak, A.M.
Pers-Kamczyc, E.
Klupczynska, E.A.
Pawłowski, T.A.
Powiązania:
https://bibliotekanauki.pl/articles/2077752.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
ABI5
RGL2
14-3-3
plant hormones
tree
Opis:
European beech seeds are characterised by deep physiological dormancy and to germinate, they require several weeks of stratification at 3°C. Seed dormancy is under hormonal regulation, but the de- tails of how hormones regulate deep dormancy in trees remain not yet well elucidated. We hypothesised that the mechanism of seed dormancy breaking is differentially regulated according to depth of dormancy. Expression of ABI5 and 14-3-3, members of the abscisic acid pathway, and RGL2, a member of gibberel- lic acid pathways, were examined at the protein and mRNA levels during dormancy alleviation of beech seeds. Unlike in non-deep dormant seeds, ABI5, 14-3-3 and RGL2 were present during nearly all periods of cold stratification in beech seeds, but during dormancy breaking and germination these proteins nearly disappeared. Relative abundances of ABI5 and 14-3-3 transcripts were the highest in dormant dry seeds, and during stratification it decreased gradually. We suppose that during stratification, de novo translation of proteins on the basis of deposited mRNA occurred. On the base of our research we can conclude that the seed dormancy breaking mechanism differs according to seed’s dormancy depth
Źródło:
Dendrobiology; 2019, 81; 22-30
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Functional analysis of ABI5 and RGL2 in dormancy breaking of Acer platanoides L. seeds
Autorzy:
Staszak, A.
Guzicka, M.
Maslowska, S.
Pawlowski, T.A.
Powiązania:
https://bibliotekanauki.pl/articles/80156.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
dormancy breaking
germination
Acer platanoides
seed
environment condition
Norway maple
conference
gibberellic acid
abscisic acid
functional analysis
ABI5 expression
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2013, 94, 3
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 22

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