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首页> 外文期刊>Acta Horticulturae >Effects of pesticide on the chlorophyll fluorescence parameters in no-heading Chinese cabbage.
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Effects of pesticide on the chlorophyll fluorescence parameters in no-heading Chinese cabbage.

机译：农药对无头大白菜叶绿素荧光参数的影响。

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摘要

To probe pollution ecology effects of pesticide in vegetables, the chlorophyll fluorescence transients were measured by a Plant Efficiency Analyzer (PEA; Hansatech Ltd., King's Lynn, Norfolk, England) in no-heading Chinese cabbage, and the activity of photosystem II (PS II) was analyzed by the fluorescence transient (the JIP-test). Three pesticides, including phorate, phoxin and cypermetrin, were sprayed on the leaves of no-heading Chinese cabbage. The results showed that on the third day after treatments, these pesticides could promote reducing from primary quinone acceptor QA to QA- in PS II, e.g., increasing parameters in relation to J phase, i.e., relative variable fluorescence at the J-step (VJ) and approximated initial slope of the fluorescence transient (Mo). Meanwhile they prohibited electron transmission from QA- to QB in PS II, e.g., sharply decreasing parameters of electron transport flux per PS II reaction center (ETo/RC), probability that a trapped exciton moved an electron into the electron transport chain beyond QA- ( psi o) and quantum yield of electron transport ( Upsilon Eo), and further resulted in sharping decrease of driving force on absorption and cross section basis of PS II (DFABS and DFCS), respectively. Effects of phorate on the above parameters showed that dynamic change of residuals was significant and strongly related to the dosage, which would be loss of effect gradually from the fifth day after treatment.
机译：为了探究农药对蔬菜的污染生态影响，使用植物效率分析仪（PEA; Hansatech Ltd.，King's Lynn，Norfolk，英格兰）在无头大白菜中测量叶绿素荧光瞬态，并测定光系统II（PS）的活性。 II）通过荧光瞬态分析（JIP测试）。在无去头大白菜的叶子上喷洒了三种农药，包括磷酸酯，光合剂和氰菊酯。结果表明，在处理后的第三天，这些农药可促进PS II中从初级醌受体Q A 还原为Q A - ，例如，与J相有关的参数增加，即，J步的相对可变荧光（V J ）和近似的荧光瞬态初始斜率（M o ）。同时，它们禁止电子从PS II中的Q A -传输到Q B ，例如，每个PS II反应的电子传输通量参数急剧降低中心（ETo / RC），捕获的激子将电子移动到电子传输链中超出Q A -（psi o ）的概率，并且电子输运（Upsilon Eo ）的量子产率，并进一步导致驱动力在PS II（DF ABS 和DF CS ）。磷酸根对以上参数的影响表明残留物的动态变化是显着的，并且与剂量密切相关，这将从治疗后第五天开始逐渐消失。

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