Seed dormancy and germination behaviour of Echinochloa colona
1987
Chun, J.C. (Chonbuk National Univ., Chonju (Korea R.). Dept. of Agricultural Chemistry) | Moody, K. (International Rice Research Inst., Laguna (Philippines). Dept. of Agronomy)
Seed dormancy and germination response to light and gases were determined for Echinochloa colona (L.) Link. E. colona seeds did not require a period of after-ripening for breaking dormancy. Water movement occurred readily across the seed coat. Repeated cycles of hydration and dehydration reduced viability and thence germination. Water inbibition for 24hr. increased seed moisture by 21 %; seeds returned to their original weight after drying at room temperature for 13hr. Removal of seed-coats increased germination in the dark. Light stimulated germination. Germination at a daylight intensity of 51.9 Wm** (-2) or less was significantly reduced. Germination of seeds which were exposed to light for 1hr. a day was significantly less than0931 that of seeds exposed for longer than 2hr. a
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