链格孢
生物
芸苔属
黑斑病
枯萎病
油菜籽
甘蓝链格孢菌
植物
叶斑病
分生孢子
芥子植物
植物抗病性
基因
园艺
微生物学
遗传学
拟南芥
突变体
作者
Prashant Yadav,Zahoor Ahmad Mir,Sajad Ali,Pradeep K. Papolu,Anita Grover
出处
期刊:Fungal Biology
[Elsevier]
日期:2020-01-01
卷期号:124 (1): 44-53
被引量:7
标识
DOI:10.1016/j.funbio.2019.11.002
摘要
Alternaria blight is one of the most devastating diseases of rapeseed-mustard caused by a necrotrophic fungus Alternaria brassicae. Lack of satisfactory resistance resource in Brassica is still a main obstruction for developing resistance against Alternaria. In this study, we have selected Brassica juncea, Sinapis alba and Camelina sativa to understand and unravel the mechanism of disease resistance against Alternaria. Histopathological studies showed early onset of necrosis in B. juncea (1 dpi) and delayed in S. alba (2 dpi) and C. sativa (3 dpi) respectively. Early and enhanced production of hydrogen peroxide (H2O2) was observed in C. sativa and S. alba (6 hpi) when compared to B. juncea (12 hpi). An increase in catalase activity was observed in both C. sativa (36 % at 6 hpi) and S. alba (15 % at 12 hpi), whereas it significantly decreased in B. juncea at 6 hpi (23 %), 12 hpi (30 %) and 24 hpi (8 %). Gene expression analysis showed induction of PR-3 and PR-12 genes only in C. sativa and S. alba when compared to B. juncea suggesting their vital role for Alternaria resistance. In contrast, SA marker genes were significantly expressed in B. juncea only which provides evidence of hormonal cross talk in B. juncea during Alternaria infection thereby increasing its susceptibility.
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