The residual effects of bensulfuron-methyl on growth and photosynthesis of soybean and peanut

文献类型： 外文期刊

第一作者： Su, W. C.

作者： Su, W. C.;Sun, L. L.;Ge, Y. H.;Wu, R. H.;Xu, H. L.;Lu, C. T.;Su, W. C.;Sun, L. L.;Ge, Y. H.;Wu, R. H.;Xu, H. L.;Lu, C. T.

作者机构：

关键词： Arachis hypogaea; chlorophyll fluorescence; gas exchange; Glycine max (Linn.) Merr.; phytotoxicity; relative chlorophyll content

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

ISSN： 0300-3604

年卷期： 2018 年 56 卷 2 期

页码：

收录情况： SCI

摘要： The effects of various concentrations of bensulfuron-methyl residues (BSM, 0-500 mu g kg(-1)) on the growth and photosynthesis of soybean and peanut were studied. Shoot length, root length, root-to-shoot ratio, and biomass of soybean and peanut seedlings declined with the increase of BSM residue concentrations. As the concentration of BSM increased, SPAD value, net photosynthetic rate, stomatal limitation, stomatal conductance, and transpiration rate also declined with varying extent, but dark respiration rate and intercellular CO2 concentration increased gradually. PSII maximum quantum yield, actual quantum yield, and electron transport rate were significantly reduced by the BSM residues in soil, and the reduction was mostly attributed to the decrease in photochemical quenching coefficient. The results showed that photosynthesis in both crops was limited by nonstomatal factors. The residues of BSM caused reversible damage in PSII reaction centers and decrease the proportion of available excitation energy used for photochemistry.

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