Title: Biological characters of anthesis of Echinochloa spp.
Abstract: The process and rhythm of anthesis of Echinochloa spp. 〔E. crusgalli (L.) Beauv.; E. crusgalli var. mitis (Pursh) Peterm.; E. crusgalli var. zelayensis (H.B.K.) Hitchc.; E. crusgalli var. praticola Ohwi.; E. hispidula (Retz.) Nees.; E. colonum (L.) Link.〕 and the effects of temperature, photoperiod , sunshine and rainy days on anthesis of some of them were investigated. The setting rate of E. crusgalli var. mitis and E. hispidula was studied under different condition. The results showed that the anthesis process of different species was similar, with about 20-30 min from opening to shut of glume. Pollen dispersal were very quickly after anther growing out the glumes. The rate of stigmas in out was 100% after anthesis. The continuance of anthesis of per spica was very long, about 20-25 d, although with slight difference among different species. The anthesis rhythm of per spica was similar to parabola with tempered changes that the percent of anthesis was about 10%-15% in anthesis peak period at 11-15 d after ahthesis beginning. The daily rhythm of anthesis was that 77%-80% of those opened before 7:00, 15%-20% during 7:00-8:30, sporadic after 8:30 and no anthesis after 10:30. Temperature, photoperiod and weather effected the daily anthesis rhythm. The setting rate had no significant difference under different condition.
Publication Year: 2002
Publication Date: 2002-01-01
Language: en
Type: article
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