Differential Response of Two Biotypes of Goosegrass (Eleusine indica) with Different Sensitivities to Glyphosate to Elevated CO2 Concentrations
文献类型: 外文期刊
作者: Zhang, Tai-Jie 1 ; Feng, Li 1 ; Tian, Xing-Shan 1 ; Peng, Chang-Lian 2 ; Yang, Cai-Hong 1 ; Yue, Mao-Feng 1 ;
作者机构: 1.Guangdong Acad Agr Sci, Guangdong Prov Key Lab High Technol Plant Protect, Inst Plant Protect, Guangzhou 510640, Guangdong, Peoples R China
2.S China Normal Univ, Coll Life Sci, Guangzhou 510631, Guangdong, Peoples R China
关键词: Eleusine indica;Goosegrass;Carbon dioxide;Glyphosate resistance;Photosynthesis
期刊名称:INTERNATIONAL JOURNAL OF AGRICULTURE AND BIOLOGY ( 影响因子:0.822; 五年影响因子:0.906 )
ISSN: 1560-8530
年卷期: 2015 年 17 卷 5 期
页码:
收录情况: SCI
摘要: To reveal effects of elevated atmospheric CO2 on tolerance to the herbicide glyphosate in the populations of goosegrass (Eleusine indica) known to have resistance to this herbicide, two biotypes of goosegrass, a resistant (R) and a susceptible (S) biotype, were analyzed after exposed to ambient (400 mu mol mol(-1)) and elevated CO2 (800 mu mol mol(-1)) for 25 d. The results showed that elevated CO2 had little effect on growth of both biotypes. At elevated CO2, shoot biomass of R biotype was statistically lower than of S biotype (P<0.5). The dose-response analysis showed that glyphosate tolerance was reduced by 60% in R biotype exposed to elevated CO2 while it was slightly increased in S biotype. Elevated CO2 also had more adverse effects on photosynthetic capacity of R biotype than S biotype. As a result, maximum rate of net photosynthesis (Amax) and carboxylation efficiency (CE) under elevated CO2 in R biotype were significantly lower than in S biotype (P<0.5). These results indicate that elevated atmospheric CO2 can lead to a compromise in glyphosate tolerance of R biotype associated with poor photosynthetic characteristics, and thus will affect weed management involved with herbicide resistance in prospective agricultural systems. (C) 2015 Friends Science Publishers
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