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首页> 外文期刊>Chinese science bulletin >Responses of rice growth to copper stress under free-air C0_2 enrichment (FACE)
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Responses of rice growth to copper stress under free-air C0_2 enrichment (FACE)

机译：自由空气CO_2富集（FACE）下水稻生长对铜胁迫的响应

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摘要

The responses of rice to the second degree contamination of copper were studied by pot experiments unde free-air CO_2 enrichment (FACE) with 570 ,mol - mor~(-1) of CO, The resuits showed that the content of copper in rice leaves was reduced with the CO_2 concentration reaching 570 mu mol - mor~(-1) and this happened more significantiy under the second degree contamination of copper. Under FACE, activities o, superoxide dismutase (SOD) enzyme in rice leaves treated by copper contamination were nduced,whereas the consents of giutathione (GSH) and glutathione disulfide (GSSG) had nosigificant difference from the control. In the presence of ambient CO_2, activities of SOD enzyme treated by coppe pollution were suppressed during the whole rice growth, however, the contents of GSH and GSSG were .nduced a, tillering and jointing stages, and then restored to the control levels in later growth under the second de-gree contamination of copper. With the rice growing, the content of malondialdehyde (MDA) rises con-tinuously, but there had been no significant difference between the treatments at the same growth stage. Further studies are needed on the response mechanism of rice to Cu stress under elevated CO_2.
机译：通过盆栽试验研究了570 mol-mor〜（-1）的自由空气CO_2富集（FACE）对水稻对铜二级污染的响应，结果表明水稻叶片中铜的含量当CO_2浓度达到570μmol -mor〜（-1）时，CO 2的浓度降低，这在铜的第二级污染下更为显着。在FACE作用下，诱导了铜污染处理后的水稻叶片中的超氧化物歧化酶（SOD）酶活性，而古塔硫酮（GSH）和谷胱甘肽二硫化物（GSSG）的同意率与对照无显着差异。在环境CO_2存在的条件下，整株水稻生长受到coppe污染处理后的SOD酶活性受到抑制，但诱导，分and和拔节阶段的谷胱甘肽和谷胱甘肽含量均在后期恢复到控制水平。在第二度的铜污染下生长。随着水稻的生长，丙二醛（MDA）的含量连续增加，但在相同的生育阶段，两种处理之间没有显着差异。 CO_2升高对水稻对Cu胁迫的响应机制有待进一步研究。

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