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Characterization and mapping of a spotted-leaf genotype, spl (Y181) that confers blast susceptibility in rice

文献类型： 外文期刊

作者： Sun, Huimin 1 ; Mao, Jiejing 3 ; Lan, Bo 4 ; Zhang, Chunjiao 3 ; Zhao, Chenchen 3 ; Pan, Gang 3 ; Pan, Xiaohua 2 ;

作者机构： 1.Jinggangshan Univ, Coll Life Sci, Jian 343009, Jiangxi, Peoples R China

2.Jiangxi Agr Univ, Coll Agron, Nanchang 330045, Peoples R China

3.Zhejiang Univ, Coll Agr & Biotechnol, Hangzhou 310058, Zhejiang, Peoples R China

4.Jiangxi Acad Agr Sci, Nanchang 330200, Peoples R China

期刊名称：EUROPEAN JOURNAL OF PLANT PATHOLOGY （ 影响因子：1.907； 五年影响因子：2.022 ）

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收录情况： SCI

摘要： A spotted-leaf mutant Y181, produced by Co-60(gamma)-radiation treatment of Zixuan1, was identified in rice. The result of TEM demonstrated the number of starch grains decreased significantly, the distribution and volumes of osmiophilic granules and lipid balls were larger in the leaf cells around the lesion mimics, the chloroplasts in mesophyll cells disappeared and just leaving a few rupture thylakoid membranes in the cytoplasm and some transmutative starch granules in Y181. Compared with the wild type, the content of chlorophyll was decreased significantly, while the H2O2 content, and SOD, POD and CAT activity were obviously increased in mutant. DAB staining and H2O2 treatment further revealed oxidative burst in spotted leaves. Expression of lesion-related gene showed RuBisCo-L, RuBisCo-S, PDI and TPX was down-regulated, while PBZ1 was up-regulated in the leaf cell at the lesion mimics. Disease reaction to Magnaporthe grisea indicated that the resistance of Y181 was reduced. Genetic analysis showed that the mutant was controlled by a recessive nuclear gene, which was delimited to a 390 kb region between CH12-936 and RM7195

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