Histochemical studies on the accumulation of H2O2 and hypersensitive cell death in the nonhost resistance of pepper against Blumeria graminis f. sp tritici
Histochemical studies on the accumulation of H2O2 and hypersensitive cell death in the nonhost resistance of pepper against Blumeria graminis f. sp tritici
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DOI：
10.1016/j.pmpp.2011.07.003
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发表时间：
2011-08-01
影响因子：
2.7
通讯作者：
Wang, Minggang
中科院分区：
文献类型：
--
作者：
Hao, Xinyuan;Yu, Ke;Wang, Minggang
小麦白粉病菌Blumeria graminis f.利用组织化学方法研究了小麦赤霉病菌（Bgt）与辣椒品种A11（非寄主）和感病小麦品种陕225（非寄主）的关系。Bgt分生孢子在小麦叶片上正常发育，只有有限的可检测到的全细胞H2O2积累和细胞死亡。相反，辣椒叶片上的分生孢子萌发延迟。在非宿主相互作用中检测到高频率的H2O2积累和过敏反应（HR）。H2O2积累伴随HR和乳头形成。这些结果表明，H2O2和HR在防止非寄主病原菌Bgt在辣椒植株上定殖和病害发展中起重要作用。(C)2011爱思唯尔有限公司保留所有权利。
Defence reactions between Blumeria graminis f. sp. tritici (Bgt) and pepper cultivar 'A11' (nonhost) and susceptible wheat cultivar 'Shan 225' were studied histochemically. Conidia of Bgt developed normally on the wheat leaves with limited detectable whole-cell H2O2 accumulation and cell death. In contrast, the germination of conidia on the pepper leaves was delayed. High frequency of H2O2 accumulation and hypersensitive response (HR) were detected in the nonhost interactions. H2O2 accumulation was accompanied by HR and papilla formation. These results indicate that H2O2 and HR play important roles in preventing colonization and disease development of nonhost-pathogen Bgt in pepper plants. (C) 2011 Elsevier Ltd. All rights reserved.