Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

Wyszukujesz frazę "seed viability" wg kryterium: Temat


Wyświetlanie 1-4 z 4
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:
Practical implications of inconsistent germination and viability results in testing stored Fagus sylvatica seeds
Autorzy:
Bezdeckova, L.
Prochazkova, Z.
Matejka, K.
Powiązania:
https://bibliotekanauki.pl/articles/41257.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
practical implication
germination
viability
testing
Fagus sylvatica
beechnut
seed
Opis:
Germination and viability of stored European beech (Fagus sylvatica) seeds can vary depending upon the time when the tests are done during seed storage. To determine the possible sources of such variation the germination (GERM), germination rate expressed as mean germination time (MGT) and viability (VIAB) of six beechnut lots (three lots from two crop years) were determined monthly for one year using controlled laboratory conditions and standard tests. Higher GERM of some lots occurred when tests for stored seeds were carried out in spring and early autumn while other lots germinated better during summer tests. Similarly, different germination speed (dormancy release) and VIAB were observed in different months for different lots. However, no consistent seasonal fluctuation in GERM, MGT or VIAB of the beechnuts was observed in the tests. The reason for this fluctuation seems to be initial quality (germination and dormancy) of beechnut lots rather than any endogenous factors
Źródło:
Dendrobiology; 2014, 71
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Changes in quality of beech (Fagus sylvatica L.) seeds stored at the Forest Gene Bank Kostrzyca
Autorzy:
Gugala, A
Powiązania:
https://bibliotekanauki.pl/articles/41527.pdf
Data publikacji:
2002
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
genetic resource
Fagus sylvatica
beech
Forest Gene Bank Kostrzyca
viability loss
qualitative change
long-term storage
seed
Opis:
In the Forest Gene Bank cold stores, both long-term and strategic gene resources are stored to be used during periods of poor seed production. Beech seeds of the following harvests were evaluated: 1995, 1998 and 2000. Quality of seeds was determined with different methods from the date of reception to FGB through preparation for long-term storage, storage in cold stores and the presowing treatment. The usefulness of staining tests for rapid evaluation of beech seed viability is not sufficiently sure. The floating test in water significantly improves the level of seed purity. The current method of seed drying does not remain without influence upon beech seeds and causes a slight decrease of viability. Next to beech seed lots of rapidly declining quality in the FGB are stored seed lots whose viability does not decrease during identical technological processes. Seed lots of low initial viability should be eliminated.
Źródło:
Dendrobiology; 2002, 47 Supplement
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Loss of tolerance to desiccation in germinated Norway maple (Acer platanoides L.) seeds. Changes in carbohydrate content
Autorzy:
Pukacka, S.
Powiązania:
https://bibliotekanauki.pl/articles/41745.pdf
Data publikacji:
2001
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
glucose
stratification
viability
fructose
Acer platanoides
desiccation
tolerance loss
galactose
seed
stachyose
sucrose
Norway maple
raffinose
carbohydrate content
dormancy
Opis:
Carbohydrates were analyzed in Norway maple embryo axes and cotyledons after imbibition, in the middle of cold stratification, before germination and during radicle protrusion to 8-10 mm and 20-25 mm. Simultaneously desiccation tolerance of seeds was determined by tetrazolium (TTC) test, after desiccation of seeds to 10-20% of water content. The cotyledons were tolerant to desiccation throughout all stratification and germination period. Embryo axes became sensitive to desiccation when hypocotyls-radicle protrusion reached 20-25 mm length. In this period the significant increase of monosaccharides: glucose, fructose and galactose in embryo axes occurred. This was not observed in cotyledons. During the germination period significant decrease of sucrose and raffinose content was noted in embryo axes and cotyledons. Relatively less changes appeared in stachyose content in embryo axes while in cotyledons it decreased evidently. The mass ratio of sucrose to oligosaccharides was higher in cotyledons of germinated seeds. The marked decrease of mass ratio of oligo to monosaccharides was observed in embryo axes in the last period of germination. The role of carbohydrates in loosing tolerance to desiccation in germinated Norway maple seeds is discussed.
Źródło:
Dendrobiology; 2001, 46
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

    Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies