OsNPR3.3-dependent salicylic acid signaling is involved in recessive gene xa5-mediated immunity to rice bacterial blight
OsNPR3.3-dependent salicylic acid signaling is involved in recessive gene xa5-mediated immunity to rice bacterial blight
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OsNPR3.3依赖的水杨酸信号通路参与隐性基因xa5介导的水稻白叶枯病免疫
DOI：
10.1038/s41598-020-63059-8
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发表时间：
2020-04-14
影响因子：
4.6
通讯作者：
Zhu, Lihuang
中科院分区：
文献类型：
--
作者：
Jiang, Guanghuai;Yin, Dedong;Zhu, Lihuang
水杨酸（SA）是一种关键的天然成分，可介导许多双子叶植物对病原体的局部和全身抵抗力。然而，其在水稻抗病方面的功能存在争议。在这里，我们表明 SA 信号传导参与对米黄单胞菌的病原体相关分子模式触发免疫（PTI）和效应物触发免疫（ETI）。稻(Xoo)由隐性基因xa5介导，其中OsNPR3.3通过与TGAL11相互作用发挥重要作用。含有纯合 xa5 基因的水稻植株对外源 SA 做出积极反应，并且在 Xoo 菌株 PXO86 感染后，其内源 SA 水平也特别受到诱导。内源SA的消耗可以显着减弱植物对PXO86的抗性，甚至对86HrpXG（III型分泌系统受损的突变体PXO86）的抗性。这些结果表明，SA 在水稻植株的抗病性中发挥着重要作用，但高水平的内源性 SA 和特定水稻品种的使用可能会掩盖这一作用。
Salicylic acid (SA) is a key natural component that mediates local and systemic resistance to pathogens in many dicotyledonous species. However, its function is controversial in disease resistance in rice plants. Here, we show that the SA signaling is involved in both pathogen-associated-molecular-patterns triggered immunity (PTI) and effector triggered immunity (ETI) to Xanthomonas oryzae pv. Oryzae (Xoo) mediated by the recessive gene xa5, in which OsNPR3.3 plays an important role through interacting with TGAL11. Rice plants containing homozygous xa5 gene respond positively to exogenous SA, and their endogenous SA levels are also especially induced upon infection by the Xoo strain, PXO86. Depletion of endogenous SA can significantly attenuate plant resistance to PXO86, even to 86HrpXG (mutant PXO86 with a damaged type III secretion system). These results indicated that SA plays an important role in disease resistance in rice plants, which can be clouded by high levels of endogenous SA and the use of particular rice varieties.