Wheat Resistance to Fusarium Head Blight is Associated With Changes in Photosynthetic Parameters.
Wheat Resistance to Fusarium Head Blight is Associated With Changes in Photosynthetic Parameters.
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DOI：
10.1094/pdis-04-14-0398-re
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发表时间：
2016-02
期刊：
影响因子：
4.5
通讯作者：
Shiming Yang;Xin Li;Wanquan Chen;Taiguo Liu;S. Zhong;Lixia Ma;M. Zhang;Huai-yu Zhang;D. Yu;P. Luo
中科院分区：
文献类型：
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作者：
Shiming Yang;Xin Li;Wanquan Chen;Taiguo Liu;S. Zhong;Lixia Ma;M. Zhang;Huai-yu Zhang;D. Yu;P. Luo
小麦赤霉病是一种重要的世界性病害，但赤霉病对不同抗性小麦的生理指标的影响尚不清楚。在这里，我们评估了禾谷镰刀菌感染对小麦旗叶产量和光合相关参数Pn，Gs和Ci的影响，并确定了赤霉病抗性的影响。对抗赤霉病小麦L699及其感病姊妹系L661进行点接种和喷雾接种。随后使用调制光合作用系统测量光合作用相关参数，并评估FHB强度。与L661相比，FHB对L699旗叶净光合速率和气孔导度的影响更为显著。但FHB使L661的千粒重和穗总粒重下降幅度大于L699。独立样本t检验表明，L699的赤霉病抗性显著高于L661。结果表明，在本研究条件下，赤霉病对抗病系净光合速率的影响显著大于感病系，但对感病系产量构成因素的影响更大。这些结果提供了一个新的见解的生理成本的主机抗赤霉病。
Fusarium head blight (FHB) is an important wheat disease worldwide; however, its effects on the physiological parameters in plants with different levels of FHB resistance remain unclear. Here, we evaluated the effects of Fusarium graminearum infection on yield and the photosynthesis-associated parameters Pn, Gs, and Ci of wheat flag leaves and determined the influence of FHB resistance. The FHB-resistant wheat genotype L699 and its susceptible sister line L661 were point- and spray-inoculated. Photosynthesis-associated parameters were subsequently measured using a modulated photosynthesis system, and FHB intensity was evaluated. Compared with L661, FHB caused more significant reductions in the net photosynthetic rate and stomatal conductance of flag leaves in L699. However, FHB caused a larger reduction in the 1000-grain weight and total grain weight per spike in L661 compared with L699. Independence sample t test showed that FHB resistance was significantly higher in L699 compared with L661. We concluded that under the conditions of the present study, FHB had a significantly greater effect on net photosynthesis in the resistant line compared with the susceptible line; however, it had a greater impact on yield components in the susceptible line. These results provide a new insight into the physiological cost of host resistance to FHB.