Science of the Total Environment ( IF 9.8 ) Pub Date : 2018-07-18 , DOI: 10.1016/j.scitotenv.2018.07.171 Yue Qi , Junsheng Li , Gang Fu , Caiyun Zhao , Xiao Guan , Bing Yan , Mengyun Ren
The effects of sublethal doses of herbicides on plants cannot be ignored, yet little is known about the effects of sublethal doses of herbicides on the F1 generation of plants. Seed germination and seedling growth of native and invasive plants following the sublethal exposure of parent plants to herbicides were comparatively analyzed in this study. Sublethal atrazine and tribenuron-methyl had carry-over effects on the germination and seedling growth of the F1 generation of invasive redroot pigweed (Amaranthus retroflexus L.) and native velvetleaf (Abutilon theophrasti Medicus), both of which had different responses to the carry-over effects of sublethal herbicide. The germination percentage of the F1 redroot pigweed (decreased) was greater than that of the F1 velvetleaf (increased or not significantly changed) following parental exposure to atrazine or tribenuron-methyl. Atrazine reduced the radical growth of 7-day-old velvetleaf seedlings and decreased the difference in seedling length between velvetleaf and redroot pigweed, while tribenuron-methyl had no significant effects on the growth of 7-day-old velvetleaf seedlings. The herbicide inhibition effect on the germination and growth of F1 velvetleaf and redroot pigweed did not increase as the sublethal dose increased. This study suggests that carry-over effects of sublethal herbicides weaken the growth advantage of the F1 velvetleaf at the seedling stage and may have a more negative influence on progeny population development of native velvetleaf compared with invasive redroot pigweed.
中文翻译:
亚致死性除草剂对子代发芽和幼苗生长的影响:紫菜(Amaranthus retroflexus)vs.绒毛(Abutilon theophrasti)
亚致死剂量的除草剂对植物的影响不容忽视,但有关亚致死剂量的除草剂对植物F1代的影响知之甚少。在本研究中,对亲本植物亚致死性暴露于除草剂后本地和入侵植物的种子发芽和幼苗生长进行了比较分析。亚致死at去津和甲基苯磺隆对F1代入侵性红根杂草(Amaranthus retroflexus L.)和原生草皮(Abutilon theophrasti)的发芽和幼苗生长具有残留效应。Medicus),两者对亚致死性除草剂的残留效应有不同的反应。亲本暴露于阿特拉津或甲基苯磺隆后,F1红根杂草的发芽率(降低)大于F1绒毛的发芽率(提高或未明显改变)。阿特拉津降低了7天龄绒毛幼苗的根基生长,并减少了其与长根藜之间的苗长差异,而丁苯磺隆对7天龄绒毛幼苗的生长没有显着影响。随着亚致死剂量的增加,除草剂对F1绒毛和红根杂草的萌发和生长的抑制作用没有增加。