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论文题目: Up-Regulation of MPK4 Increases the Feeding Efficiency of the Green Peach Aphid Under Elevated CO2 in Nicotiana attenuata
论文题目英文:
作者: 郭慧娟,Xin-Hong Peng,顾丽元,#Jian-Qiang Wu,戈峰,孙玉诚*
论文出处:
年: 2017
卷:
期: DOI: 10.1093/jxb/erx394
页:
联系作者: 孙玉诚
发表期刊: Journal of Experimental Botany
ISSN:
第一作者所在部门:
收录类别:
论文链接: https://academic.oup.com/jxb/advance-article/doi/10.1093/jxb/erx394/4616866
影响因子:
摘要: Previous research has shown that elevated CO2 reduces plant resistance against insects and enhances the water use efficiency of C3 plants, which improves the feeding efficiency of aphids. Although plant mitogen-activated protein kinases (MAPKs) are known to regulate water relations and phytohormone-mediated resistance, little is known about the effect of elevated CO2 on MAPKs and the cascading effects on aphids. By using stably transformed Nicotiana attenuataplants silenced in MPK4, wound-induced protein kinase (WIPK), or salicylic acid-induced protein kinase (SIPK), we determined the functions of MAPKs in plant-aphid interactions and their responses to elevated CO2. The results showed that among all plant genotypes, inverted repeat MPK4 plants had the largest stomatal apertures, the lowest water content, the strongest jasmonic acid (JA)-dependent resistance, and the lowest aphid numbers, suggesting that MPK4 affects plant responses to aphids by regulating stomatal aperture and JA-dependent resistance. Regardless of aphid infestation, elevated CO2 up-regulated MPK4, but not WIPK or SIPK, in wild-type plants. Elevated CO2 increased the number, mean relative growth rate, and feeding efficiency of aphids on all plant genotypes except inverted repeat MPK4. We conclude that MPK4 is a CO2-responsive plant determinant that regulates the molecular interaction between plants and aphids.
英文摘要:
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