农业环境科学学报2012，Vol.31Issue(12)：2466-2472,7.
三种湿地植物抗寒性的初步研究
Preliminary Study on Cold Resistance of Three Kinds of Wetland Plants
摘要
Abstract
This paper investigated the effect of temperature grading decrease on cold resistance of three kinds of common wetland plants: Iris pseudacorus L., Iris ensata Thunb. and Oenabthe javanica. Changes in cold resistance of the plants were reflected by some physiological indexes. The physiological indexes included soluble protein, soluble sugar, proline, EL, MDA, SOD, POD and CAT. The results showed that cold resistance of the plants was improved in the process of cold hardening by adjusting antioxidant enzyme activities and permeability. The step by step cooling brought about changes in some cold resistance related enzymes and permeability regulatory substances. In addition, different species showed different change law in physiological indexes. Antioxidant enzyme activity of Im pseudacorus L. increased obviously in low temperature. SOD activity of Iris pseudacorus L. at 5 X. was 5.77 times higher than the initial value. CAT activity of Iris ensata Thunb. maintained a high level, and it was 8.95 times and 3.77 times more active than that of Iris pseudacorus L. and Oenabthe javanica respectively at 5 t. Concentration of praline of Oenablhe javanica remarkabley increased and it was negative related to temperature (R =-0.755, P= 0.050). After a comprehensive comparison of all the indexes, the cold resistant ability could be ranked as follows :Iris pseudacorus L.>/ris ensata Thunb.>Oenabthe javanica.关键词
湿地植物/酶/低温锻炼/抗寒性Key words
wetland plants/ enzyme/ cold hardening/ cold resistance分类
资源环境引用本文复制引用
梁雪,贺锋,徐洪,肖蕾,黄福青,徐栋,吴振斌..三种湿地植物抗寒性的初步研究[J].农业环境科学学报,2012,31(12):2466-2472,7.基金项目
国家自然科学基金(51178452) （51178452）
湖北省杰出青年基金(2010CDA093) （2010CDA093）
国家科技支撑计划(2012BAJ21B03-04) （2012BAJ21B03-04）
国家"十二五"水专项(2012ZX07101007-005) （2012ZX07101007-005）
