水淹环境下光强对狗牙根幼苗生长及生理的影响  

Effects of Light Intensity on the Growth and Physiology of Cynodon dactylon Seedlings under Water Submerged Environment

作　　者：秦洪文[1] 高芳[1] 刘正学[1] 李洪林[1] 郑丽丹[1] 苏华英[1] 孟佳媚 

机构地区：[1]重庆三峡学院生命科学与工程学院,重庆万州404100

出　　处：《草地学报》2017年第3期675-679,共5页Acta Agrestia Sinica

基　　金：国家自然科学基金面上项目"三峡库区消落带种子库动态及多年生草本植物适应机制"(31270451);重庆市研究生科研创新项目"三峡水库消落区土壤种子库与地表植被时空变化趋势研究"(CYS15224);重庆三峡学院青年项目"三峡水库低海拔滩涂消落带地上植被和土壤种子库研究"(15QN08)资助

摘　　要：本研究设置全淹光照和全淹黑暗的生境,探索了水淹环境下光强对狗牙根(Cynodon dactylon)幼苗生长的影响。结果表明:两种水淹处理结果相同,均表现为地上部逐渐死亡;叶绿素含量、根生物量比显著升高;叶绿素a/b,根、叶可溶性糖,叶生物量、总生物量以及叶生物量比显著下降;叶、根淀粉含量及根、茎生物量无显著变化。The submergence environments of light and dark were set in the laboratory to explore effects of light intensity on the growth of Cynodon dactylon seedlings under flooded environment in this study.The results showed that two kinds of submergence treatments appeared the same trend.The shoots gradually died.Chlorophyll content,root biomass increased significantly.Chlorophyll a/b,soluble sugar contents of leaves and roots,leaf biomass,total biomass and leaf biomass ratio decreased significantly.There were no significant changes of the leaves＇ and roots＇ starch contents,the root biomass and stem biomass ratio during the whole treatment period.

关 键 词：狗牙根幼苗 水下光强 形态生长 生理特性 生物量 

分 类 号：Q948.118[生物学—植物学]