Effects of glyphosate on germination, photosynthesis and chloroplast morphology in tomato
Effects of glyphosate on germination, photosynthesis and chloroplast morphology in tomato
复制标题
草甘膦对番茄发芽、光合作用和叶绿体形态的影响
DOI：
10.1016/j.chemosphere.2020.127350
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发表时间：
2020
期刊：
影响因子：
8.8
通讯作者：
Mojiri Amin
中科院分区：
文献类型：
--
作者：
Khan Sajida;Zhou John L.;Ren Lei;Mojiri Amin
草甘膦除草剂对植物的不利影响已广为人知，但潜在的毒效效应尚未得到充分研究。本研究旨在使用番茄作为模式生物，探讨草甘膦在水（0–30 mg L−1）和堆肥土壤（0–30 mg kg−1）中的潜在毒物兴奋效应。首次在番茄中证明了水中浓度为 0.03–1 mg·L−1 或堆肥中浓度为 0.03–1 mg·kg−1 的草甘膦的生长促进作用。这些激效效应表现为在草甘膦溶液浸泡的纸巾上发芽的幼苗以及喷洒草甘膦的作物的下胚轴和胚根生长增加。当种子播种在用草甘膦改良的堆肥中以及当叶子喷洒草甘膦时，4周龄作物的光合作用速率增加（高达2倍）。使用透射电子显微镜检查叶绿体形态表明，毒物兴奋效应与叶绿体的伸长有关，这可能是由于类囊体基粒的横向扩张所致。
The adverse effects of glyphosate herbicide on plants are well recognised, however, potential hormetic effects have not been well studied. This study aimed to use tomato as a model organism to explore the potential hormetic effects of glyphosate in water (0–30 mg L−1) and in compost soil (0–30 mg kg−1). The growth-promoting effects of glyphosate at concentrations of 0.03–1 mg L−1in water or 0.03–1 mg kg−1in compost were demonstrated in tomato for the first time. These hormetic effects were manifest as increased hypocotyl and radicle growth of seedlings germinated on paper towel soaked in glyphosate solution and also in crops which had been sprayed with glyphosate. Increased rates of photosynthesis (up to 2-fold) were observed in 4-week old crops when seeds were sown in compost amended with glyphosate and also when leaves were sprayed with glyphosate. The examination of chloroplast morphology using transmission electron microscopy revealed that the hormetic effects were associated with elongation of chloroplasts, possibly due to lateral expansion of thylakoid grana.