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Effect of environmental stress on non-structural carbohydrates reserves and transfer in seagrasses

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Author:: No author available

Journal Title:: Acta Ecologica Sinica

Issue:: 19

DOI:: 10.5846/stxb201108311275

Key Word:: 海草;非结构性碳水化合物;环境胁迫;储存;转移

Abstract：非结构性碳水化合物在海草体内的代谢对植株的生长有重要影响.为更好地跟踪非结构性碳水化合物在海草响应环境胁迫中所起的作用,根据国内外最新文献,重点综述了光强、营养盐、盐度、海洋酸化、温度、硫化物和动物摄食等环境胁迫对海草非结构性碳水化合物储存和转移的影响.光限制和富营养化均降低非结构性碳水化合物的合成,并使之从地下根茎转移到叶；而海洋酸化却促进非结构性碳水化合物合成并向地下组织转移；盐度变化改变海草体内渗透压,需要非结构性碳水化合物的新陈代谢来维持；温度通过影响光合作用、呼吸作用、氮代谢来影响非结构性碳水化合物的合成与储存；而硫化物和动物摄食则分别通过抑制海草酶的活性和啃食海草光合组织,减少非结构性碳水化合物的合成和储存.同时指出了一些今后关于海草非结构性碳水化合物的重点研究方向:(1)海草不同生命阶段(种子休眠和萌发,发育,繁殖等)非结构性与结构性碳水化合物之间,以及可溶糖与淀粉之间的转化分配机制；(2)双环境因子或者多环境因子对海草非结构性碳水化合物的耦合作用；(3)非结构性碳水化合物作为海草床生态系统健康评价指标的研究与应用.

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