Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

Effect of temperature, desiccation, nitrate and light on the seasonal dormancy pattern expression of Cirsium arvense (L.) Scop. achenes

100%

Bochenek A., Giełwanowska I.

Zeszyty Problemowe Postępów Nauk Rolniczych

2006

tom 509

The objective of the present study was to determine the effects of soil temperature, desiccation, light conditions and concentration of nitrates on the seasonal germination pattern of Cirsium arvense achenes. Seed lots collected in summer were buried in field in autumn. Once a month all over a year, one portion of them was exhumed to test germination in light or darkness, with or without nitrate and with or without desiccation. Seeds germination also was tested after long preincubation at various constant temperatures (2, 6, 12 and 19°C) and at temperatures rising stepwise from 2 to 26°C. Creeping thistle seeds did not show of apparent endogenous seasonal dormancy pattern. Environmental conditions in soil bank resulted in the appearance of seasonal changes in seed germination. The changes in dormancy were mainly regulated by the field temperature. The dormancy of imbibed seeds was relieved by rising temperatures, when the temperature had reached 12°C. The temperature increase above 12°C resulted in dormancy induction. The dormancy breaking of imbibed seeds stored for 2 months at 19°C was complete, but during longer storage dormancy development occurred. The seed dormancy relief at lower temperatures was slower and incomplete. Nitrate, desiccation and light affected seed germination to a lesser extent, and their effects were season-related.

Ograniczanie wyników

1 Zeszyty Problemowe Postępów Nauk Rolniczych

1 Bochenek A.

1 Giełwanowska I.

1 2006

Wyniki wyszukiwania

Effect of temperature, desiccation, nitrate and light on the seasonal dormancy pattern expression of Cirsium arvense (L.) Scop. achenes