棉 花 学 报     Cotton Science 2009，21(1)：73-76

Effect of Water Stress on Germination of Cotton Seeds
WANG Yan-qin，YANG Wei-hua，XU Hong-xia，ZHOU Da-yun，FENG Xin-ai，KUANG Meng
(Cotton Research Institute,Chinese Academy of Agricultural Sciences，Anyang，Henan 455000，China)

Abstract：The effect of water stress on germination of cotton seeds was studied, while different treatments were simulated as different concentrations of polyethylene glycol (PEG). The result showed that as water potential decreased, germination percentage, speed of germination, germination index, vigor index, sprout length, roots length, R/S (ratio of root to shoot), fresh and dry weight of plant decreased in different extent. The decreasing extent of percentage germination and R/S were not distinct in lower stress. However, all of the indexes were restrained intensely while concentrations of PEG exceed 15%.
Key words：cotton seed；water stress；germination percentage；speed of germination；germination
            index；root/shoot           [Full Text, 1493KB]