Effect of imazapic residues on photosynthetic traits and chlorophyll fluorescence of maize seedlings

文献类型： 外文期刊

第一作者： Su, W. C.

作者： Su, W. C.;Sun, L. L.;Wu, R. H.;Ma, Y. H.;Wang, H. L.;Xu, H. L.;Lu, C. T.;Yan, Z. L.

作者机构：

关键词： chlorophyll fluorescence;gas exchange;growth characteristics;photosystem II

期刊名称：PHOTOSYNTHETICA （ 影响因子：3.189； 五年影响因子：3.38 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： The influence of various concentrations of imazapic residues (0-800 mu g kg(-1)) on the growth, chlorophyll content, and photosynthetic characteristics of maize seedlings was studied in a greenhouse pot experiment. Plant height, root length, shoot dry mass, root dry mass, and total dry mass of maize declined with the increase of imazapic residue concentrations. The root/shoot ratio initially decreased and then increased in presence of imazapic, which indicated that the effects of imazapic residues on plant height and root length might differ in maize seedlings. Lowered chlorophyll content and net photosynthetic rate were observed in leaves of maize seedlings in all treatments and indicated a dose-response relationship to imazapic concentrations. Intercellular carbon dioxide concentration, transpiration rate, and stomatal conductance also declined to varying extents, but the chlorophyll a/b ratio increased gradually together with the increase of imazapic residue concentrations. Generally, the maize seedlings were negatively affected by the imazapic residues in soil. Response of root length and biomass to imazapic residues could be the important index for maize variety selection.

分类号： Q94

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