Influence of Surface Waterlogging on Cotton Seedlings under High Temperature Synoptic Conditions

Qiao-yan Qin ； Jian-qiang Zhu ； Chen-zhong Jia ； Hong-yun Ma

《Advance Journal of Food Science and Technology》 4卷6期 (2012/12) Pp. 362-365

並列摘要

Surface waterlogging is an agro-meteorological disaster caused by excessive precipitation, when field water is too deep, too long, to detriment crop growth. Soil waterlogging caused by flooding has become a major natural disasters affecting cotton (Gossypium hirsutum L.) production in the middle and lower reaches of the Yangtze River. Pot experiment was conducted at the cotton seedlings stage and in the greenhouse to simulate the waterlogged field combined with high temperature synoptic condition after the rain. Results indicated that: surface waterlogging significantly inhibits plant growth and there was a very significant negative correlation between plant height and stress time; the root shoot ratio had a increasing tendency with coercion time extension; Chlorophyll SPAD value in cotton leaves of 6 and 9 days treatment increased in the early adversity; when the waterlogging stresses relieves, the chlorophyll SPAD value reduced significantly; red-green ratio responses to waterlogging stress is relatively lagging; red-green ratio of cotton main stalk decreased and then increased; Malondial Dehyde (MDA) content increased rapidly and lasted to a certain time; when the waterlogging stresses relieves, MDA content of 6 and 9 days treatment still maintained a higher level and there was no remarkable difference between them; at the initial period, mostly seedlings were at the wilting conditions, the activity of Superoxide Dismutase (SOD) was low; but as the flooding time extending, SOD activity increased; SOD activity change tendency of 6 and 9 days treatment was consistent; Peroxide enzyme (POD) activity had no significant difference between different treatment in the early adversity, as the prolonged waterlogging stresses, which of 3 and 9 days treatment increased gradually; after being transferred to outside the greenhouse, POD activity of 6 days treatment was low abnormally.

並列關鍵字

Cotton seedlings ； high temperature synoptic conditions ； surface waterlogging