模拟海平面上升对海滨木槿渗透调节的影响  

Effect of simulated sea-level rise on osmotic adjustment in Hibiscus hamabo Sieb.et Zucc

作　　者：王宗星[1] 吴统贵[1] 虞木奎[1] 孙海菁[1] 段溪[1] 董毅[1] 

机构地区：[1]中国林业科学研究院亚热带林业研究所,浙江富阳311400

出　　处：《生态科学》2011年第4期389-392,共4页Ecological Science

基　　金：国家科技支撑计划项目(2009BADB2B0102);国家林业局"948"引进项目(2010-4-23)

摘　　要：通过模拟海平面上升对海滨木槿主要渗透调节物质可溶性蛋白、可溶性糖和淀粉的影响发现,可溶性糖和可溶性蛋白均随水淹时间的延长呈现先升高后下降的变化,且变化较一致。而淀粉则呈先升高后下降再升高的N型曲线变化。另外通过对各个处理的分析比较发现,海滨木槿在海水淹浸35 cm·d^(-1)和6 h·d^(-1)环境下在渗透调节水平上仍然表现出较强的抗性。研究发现海滨木槿水淹胁迫程度较小的情况下可溶性糖与可溶性蛋白含量呈显著正相关,可溶性糖与淀粉呈显著负相关,说明海滨木槿在一定程度的水淹胁迫下主要渗透调节物质具有协同性,且水淹第21 d后存在可溶性糖向淀粉转化的可能。We investigated the effect of simulated sea level rising on the main osmolytes of Hibiscus hamabo Sieb. et Zucc, such as soluble protein, soluble sugar and starch. The results showed that both soluble protein and soluble sugar tended to increase first but decrease later with the prolonged time of flooding, and their changes were similar. The starch increased first and then decreased, while it increased again, showing a curve similar with ＂N＂. Through the comparison and analysis of every treatment, we found that H. hamabo Sieb. et Zucc still had stronger resistance in the level of osmolytes under the flooding condition of 45 cm·d^-1 and 6 h·d^-1. The study indicated that under slight flooding stress condition there was a positive correlation between the contents of soluble protein and soluble sugar, and a native correlation between the contents of soluble sugar and starch. It showed that the main osmolytes of H. hamabo Sieb. et Zucc were synergetic under certain extend flooding condition, and the soluble sugar might transform to the starch.

关 键 词：渗透调节 海水胁迫 相关性 

分 类 号：Q945.78[生物学—植物学]