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    Wyświetlanie 1-7 z 7
    Tytuł:
    Betula pendula seed storage and sowing pre-treatment: effect on germination and seedling emergence in container cultivation
    Autorzy:
    Tylkowski, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/41787.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    Betula pendula
    seed storage
    sowing
    pretreatment
    germination
    seedling emergence
    container cultivation
    Opis:
    Irregular seed crop in Betula pendula (Silver Birch) is a reason to create seed reserves, ensuring nursery production in years of crop failure. This study investigated the effects of seed moisture content and storage temperature on germinability and seedling emergence in container cultivation. Mature catkins were collected separately from 3 trees. The mixture of winged nuts and scales was dried to 3 levels of moisture content and stored at 3°C, –3°C and –10°C. After storage for 3, 5 and 6 years, the seeds were separated from scales and next dewinged and sorted in acetone into empty and filled seeds. Cleaned nuts were germinated in the Jacobsen germinator. Besides, to assess seedling emergence, seeds were sown on the surface of peat mixed with perlite, in multi-cell trays under a plastic tunnel. Significant differences in germinability were detected depending on the mother tree, seed moisture content and storage time. The viability of seeds stored at –10°C remained unchanged for 6 years regardless of moisture content (ca. 8–12%). Seeds stored at higher temperatures lost their germinability faster. An unexplained increase in seedling emergence was observed after extended seed storage at –10°C, in contrast to a gradual decrease in seedling emergence after extended storage at –3°C.
    Źródło:
    Dendrobiology; 2012, 67
    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:
    Seed dormancy breaking in Crataegus pedicellata
    Autorzy:
    Bujarska-Borkowska, B
    Powiązania:
    https://bibliotekanauki.pl/articles/41623.pdf
    Data publikacji:
    2008
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    scarlet hawthorn
    Crataegus pedicellata
    seed dormancy breaking
    stratification
    scarification
    germination
    seedling emergence
    desiccation
    Opis:
    The effects of stratification and scarification on seed dormancy breaking were compared in scarlet hawthorn (Crataegus pedicellata Sarg. = C. coccinea L). Ripe fruits were collected (in October) and the extracted nutlets were cleaned, and dried to a moisture content of 9–12%. Seed dormancy in this species was broken most effectively by warm-followed-by-cold stratification of nutlets, in a substrate or without any substrate, as well as at 15~25° or 20~30°C, i.e. with a cyclically alternating warm stage (16+8 hrs or 24+24 hrs/cycle) lasting 16–20 weeks, followed by the cold stage at 3°C lasting ca. 20 weeks, i.e. till the appearance of the first germinating seeds. After stratification, emergence rate is equally high (ca 76%) at cyclically alternating temperatures of 3~15°C or 3~20°C (16+8 hrs). Chemical scarification of nutlets in 96% sulphuric acid for 2 hrs, followed by warm-cold stratification at 20~30°/3°C, with a short, 4-weeks warm stage, also ensures a high emergence rate (85–93%). Seed desiccation (in nutlets) slowly to moisture content of 12–14%, after stratification in a substrate or scarification does not reduce the seedling emergence of seeds. Emergence decreased when seeds were desiccated after stratification without any substrate. Results provide new methods of breaking of dormancy and high germination and emergence of hard-coated Crataegus seeds in controlled conditions.
    Źródło:
    Dendrobiology; 2008, 60; 51-56
    1641-1307
    Pojawia się w:
    Dendrobiology
    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:
    Physiological method for improving seed germination and seedling emergence of root parsley in organic systems
    Fizjologiczne metody poprawy kiełkowania nasion i wschodów siewek pietruszki korzeniowej w systemach ekologicznych
    Autorzy:
    Grzesik, M.
    Janas, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/337279.pdf
    Data publikacji:
    2014
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Maszyn Rolniczych
    Tematy:
    parsley
    hydroconditioning
    seed
    germination
    seedling emergence
    growth
    pietruszka korzeniowa
    hydrokondycjonowanie
    nasiono
    kiełkowanie
    siewka
    wschody
    wzrost
    Opis:
    The aim of the experiments was to determine the optimal parameters of hydroconditioning of root parsley ’Berlińska’ seeds and an indication of how the moisture content and the time of incubation affect the dynamics of germination, physiological activity, emergence and growth of seedlings. Seeds were hydrated at 20°C, at different doses of distilled water, from the ini-tial moisture content of 8% up to 30 , 35 and 45%. Then, they were incubated at 20°C, in airtight containers for 1, 3 and 6 days, with daily ventilating and assessing moisture content. After that, their sowing value was assessed on the basis of dy-namics of germination at 20°C, mean time of germination, cytoplasm membrane permeability, total dehydrogenase activity, dynamics of emergence, the number of emerged seedlings and their height 45 days after sowing, as well as index of chloro-phyll content and net photosynthesis in leaves. The results indicated that hydroconditioning greatly increased the dynamics and the percentage of seed germination and seedling emergence of parsley 'Berlińska'. Seeds hydrated up to about 45% and incubated at 20°C for a period of 3 or 6 days, and then dried down to the initial moisture content, were more vigorous, germinated more quickly and in higher percentage. They showed the higher enzyme activity and lower permeability of membranes. The obtained from them seedlings emerged and grew faster, contained more chlorophyll and exhibited the higher photosynthetic activity than seedlings from control.
    Celem badań było określenie optymalnych parametrów hydrokondycjonowania nasion pietruszki korzeniowej "Berlińska" oraz wskazanie, jak stopień ich uwilgotnienia i czas inkubacji wpływa na dynamikę kiełkowania, aktywność fizjologiczną, wschody i wzrost roślin. Nasiona uwilgotniono w 20°C, w odpowiednich dawkach wody destylowanej, od wilgotności wyjściowej 8% do 30, 35 i 45%. Następnie inkubowano je w temperaturze 20°C, w hermetycznych pojemnikach przez 1, 3 i 6 dni, codziennie przewietrzając i oceniając ich wilgotność. W kolejnym etapie określono ich wartość siewną na podstawie dynamiki kiełkowania w temperaturze 20°C, średniego czasu kiełkowania, przepuszczalności błon cytoplazmatycznych, całkowitej aktywności dehydrogenaz i dynamiki wschodów siewek. Po 45 dniach od wysiewu oceniono wysokość siewek oraz indeks zawartości chlorofilu i aktywność fotosyntezy netto w liściach. Uzyskane wyniki wykazały, że hydrokondycjonowanie znacznie zwiększyło dynamikę i zdolność kiełkowania nasion oraz dynamikę wschodów i wzrost roślin pietruszki korzeniowej. Nasiona uwilgotnione do 45% i inkubowane w 20°C przez okres od 3 do 6 dni i następnie suszone do wilgotności wyjściowej, skiełkowały szybciej i w większym procencie. Charakteryzowały się one również wyższą aktywnością enzymatyczną i niższą przepuszczalnością błon cytoplazmatycznych. Uzyskane z nich siewki wschodziły i rosły szybciej oraz zawierały więcej chlorofilu. Aktywność fotosyntezy netto była w nich wyższa, niż w siewkach uzyskanych z nasion nie kondycjonowanych.
    Źródło:
    Journal of Research and Applications in Agricultural Engineering; 2014, 59, 3; 80-86
    1642-686X
    2719-423X
    Pojawia się w:
    Journal of Research and Applications in Agricultural Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Seed storage, germination and seedling emergence in Rhamnus catharticus
    Autorzy:
    Tylkowski, T
    Powiązania:
    https://bibliotekanauki.pl/articles/41131.pdf
    Data publikacji:
    2007
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    common buckthorn
    Rhamnus catharticus
    North America
    seed storage
    germination
    seedling emergence
    invasive species
    landscape shrub
    shrub
    tree
    medicinal plant
    Opis:
    This study was aimed to improve the understanding of germination ecology and to explain the invasive character of the common buckthorn (Rhamnus catharticus) in North America. Its fully mature seeds are characterized by a lack of dormancy. In laboratory conditions, favourable thermal conditions were identified for seed storage, germination and seedling emergence. At the cyclically alternating temperature of 20~30°C (16+8 h daily), seeds of this species showed a high germination rate within few weeks. Two other thermal variants, 3~15°C and 3~20°C (16+8 h daily), were much less effective for seed germination. However, cold stratification (at 3°C) in a moist mixture of peat and sand, lasting 4–8 weeks, caused a remarkable increase in germination rate also at 3~15°C. Seeds extracted from ripe fruits and dried (to a moisture content of about 10%) showed high germination and emergence rates after storage for 3.5 years at –3°C.
    Źródło:
    Dendrobiology; 2007, 58; 67-72
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Seed dormancy breaking in Crataegus laevigata
    Autorzy:
    Bujarska-Borkowska, B
    Powiązania:
    https://bibliotekanauki.pl/articles/41708.pdf
    Data publikacji:
    2006
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    scarification
    stratification
    germination
    seedling emergence
    desiccation
    storage
    seed dormancy breaking
    Crataegus laevigata zob.Crataegus oxyacantha
    tree species
    shrub species
    Crataegus oxyacantha
    Opis:
    Laboratory experiments were made to determine the optimum conditions for dormancy breaking in the midland hawthorn (Crataegus laevigata (Poir.) DC. = C. oxyacantha L.). Its small applelike fruits should be collected when they are fully ripe (in Poland in October). The nutlets extracted from the fruits must be dried at room temperature to the moisture content of 9–13%. The dormancy of midland hawthorn seeds can be overcome by: (1) stratification in a moist medium: 20~30°C/3°C, 16–20 weeks at 20~30°C (16+8 hrs or 24+24 hrs) followed by 16–18 weeks at 3°C, i.e. to the time when first radicles start to appear; or (2) chemical scarification in concentrated sulphuric acid for 2 or 3 hrs, followed by warm stratification at 27.5°C or 20~30°C for 4 weeks and cold stratification at 3°C, lasting 19–21 weeks, i.e. to the time when first radicles start to appear. The stratified seeds germinate vigorously (in 3–5 weeks) and at a high percentage at temperatures of 3~15°C or 3~20°C (16+8 hrs) and all seedlings emerge in such conditions about 4–6 weeks after sowing. Seed germination after stratification or scarification can be stopped by partial desiccation of seeds. Seed desiccation after stratification to the moisture content of 10–13% and sealed storage at –3°C for one year do not reduce seed germination and seedling emergence rates of the previously pretreated seeds. Storage for 20 months at –3°C of seeds dried after harvest to the moisture content of 14% does not reduce their germination and seedling emergence.
    Źródło:
    Dendrobiology; 2006, 56; 3-11
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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