Enhanced UV・B radiation increases glyphosate resistance in velvetleaf(Abutilon theophrasti)
Enhanced UV・B radiation increases glyphosate resistance in velvetleaf(Abutilon theophrasti)
复制标题
增强的 UV·B 辐射可提高苘麻 (Abutilon theophrasti) 的草甘膦抗性
DOI：
10.1111/j.1751-1097.2012.01234.x
复制
发表时间：
2012
影响因子：
3.3
通讯作者：
S. Wang
中科院分区：
文献类型：
--
作者：
L. Yin;M. Zhang;Z. Li;L. Duan;S. Wang
臭氧层的消耗导致地球表面的紫外线B辐射增加，这可能会影响杂草及其对除草剂的反应。然而，增加的UV-B辐射对杂草的影响以及杂草和除草剂的相互作用仍然不清楚。本研究的目的是比较草甘膦对在增加和不增加UV B辐射下生长的绒叶的功效。增加B辐射对绒叶类植物幼苗的叶面积、干重和净光合作用产生不利影响。在增加UV B辐射下，叶角质层蜡质显著增加28%。Glycoprotein对天鹅绒叶的功效，通过茎干重评估，通过增加UV B辐射显著降低。暴露于增加的UV-B辐射显著降低14 C-草甘膦吸收从49%至43%，也导致更少的14 C-草甘膦转运出处理的叶片和更少的草甘膦积累在新展开的叶片。草甘膦效力的降低是由于吸收和分布的变化，这归因于角质层蜡质增加和UV-B辐射增加导致的光合作用降低。这些结果表明，杂草对除草剂的反应可能会受到增加的UV-B辐射的影响，在某种程度上，可能需要更高的速率才能达到预期的效果。
Depletion of the ozone layer leads to increasing UV‐B radiation on the earth's surface, which may affect weeds and their responses to herbicides. However, the effect of increased UV‐B radiation on weeds and the interaction of weeds and herbicides are still obscure. The objective of this study was to compare glyphosate efficacy on velvetleaf that was grown under with and without increased UV‐B radiation. Leaf area, dry weight and net photosynthesis of velvetleaf seedlings were adversely affected by increased UV‐B radiation. Leaf cuticle wax significantly increased by 28% under increased UV‐B radiation. Glyphosate efficacy on velvetleaf, evaluated by shoot dry weight, was significantly decreased by increased UV‐B radiation. Exposure to increased UV‐B radiation significantly decreased14C‐glyphosate absorption from 49% to 43%, and also resulted in less14C‐glyphosate translocation out of treated leaves and less glyphosate accumulation in newly expanded leaves. The decrease in glyphosate efficacy was due to changes in absorption and distribution, which were attributed to increased cuticle wax and decreased photosynthesis caused by increased UV‐B radiation. These results suggest that the responses of weeds to herbicides may be affected by increased UV‐B radiation, to the extent that higher rates may be required to achieve the desired effects.