中文摘要：大气CO2浓度升高通常会增强C3植物的光合作用，并改变植物组织的初级和次级代谢产物。通过调节寄主植物的防御信号通路，CO2浓度升高可能会影响植物、病毒与传播病毒的介体昆虫间的交互作用。植物中抗性基因介导的抗性对病原体和植食性昆虫表现出高效、高特异性的防御。线虫抗性基因Mi-1.2对烟粉虱在内的某些刺吸式口器昆虫具有一定的抗性，本文研究了CO2浓度升高对含有和不含有线虫抗性基因Mi-1.2的番茄植株的影响，并研究了CO2浓度升高对介体烟粉虱性能和TYLCV严重程度的影响。本研究结果表明，在CO2浓度升高条件下，含有抗性基因Mi-1.2的植株基因型可能更容易感染TYLCV及其他植物病毒。
外文摘要：Elevated atmospheric CO2 typically enhances photosynthesis of C3 plants and alters primary and secondary metabolites in plant tissue. By modifying the defensive signaling pathways in host plants, elevated CO2 could potentially affect the interactions between plants, viruses, and insects that vector viruses. R gene-mediated resistance in plants represents an efficient and highly specific defense against pathogens and herbivorous insects. The current study determined the effect of elevated CO2 on tomato plants with and without the nematode resistance gene Mi-1.2, which also confers resistance to some sap-sucking insects including whitefly, Bemisia tabaci. Furthermore, the subsequent effects of elevated CO2 on the performance of the vector whiteflies and the severity of Tomato yellow leaf curl virus (TYLCV) were also determined. The results showed that elevated CO2 increased the biomass, plant height, and photosynthetic rate of both the Moneymaker and the Mi-1.2 genotype. Elevated CO2 decreased TYLCV disease incidence and severity for Moneymaker plants but had the opposite effect on Mi-1.2 plants whether the plants were agroinoculated or inoculated via B. tabaci feeding. Elevated CO2 increased the salicylic acid (SA)-dependent signaling pathway on Moneymaker plants but decreased the SA-signaling pathway on Mi-1.2 plants when infected by TYLCV. Elevated CO2 did not significantly affect B. tabaci fitness or the ability of viruliferous B. tabaci to transmit virus regardless of plant genotype. The results indicate that elevated CO2 increases the resistance of Moneymaker plants but decreases the resistance of Mi-1.2 plants against TYLCV, whether the plants are agroinoculated or inoculated by the vector. Our results suggest that plant genotypes containing the R gene Mi-1.2 will be more vulnerable to TYLCV and perhaps to other plant viruses under elevated CO2 conditions.
外文关键词：elevated CO2；resistance；Mi-1.2 gene；tomato；TYLCV；whitefly
作者：Guo, Huijuan；Huang, Lichao；Sun, Yucheng；等
作者单位：中国科学院
期刊名称：FRONTIERS IN PLANT SCIENCE
期刊影响因子：4.495
出版年份：2016
出版刊次：11
点击下载：CO2浓度升高对含有和不含有抗性基因Mi-1.2的番茄基因型感染TYLCV的差异影响研究