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<p>Pest infestation on crops trigger high cellular oxidative stress. The strong indicator of oxidative stress initiation are lipoxgenases. We attempted to examine the status of <i>LOX 2</i> gene and its encoded protein in <i>B. juncea</i>- <i>B. fruticulosa</i> derived lines against&#xa0;<i>Lipaphis erysimi</i>&#xa0;infestation. Cultivated brassicas display lack of resistance against mustard aphid infestation. <i>Brassica fruticulosa</i>, a wild crucifer is a source of enriched resistance gene pool. LOX 2 activity and&#xa0;<i>LOX2</i>&#xa0;gene expression fold changes were higher in resistant genotypes&#xa0;than susceptible genotypes following 48&#xa0;h&#xa0;(9.79 and 6.52 fold, respectively)&#xa0;of aphid infestation. Highly resistant test genotype,&#xa0;<i>B. fruticulosa</i>&#xa0;and resistant IL Ad<sub>4</sub>-64 displayed 1.87 and 3.83-fold decline in malondialdehyde&#xa0;content at 48&#xa0;h post-infestation. We depicted&#xa0;pivotal role of LOX 2 in resistance during Brassica-mustard aphid interactions which has not been documented so far.</p>

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Lipoxygenase 2 is a potential resistance determinant in Brassica juncea – B. fruticulosa derived lines against Lipaphis erysimi infestation

  • 期刊论文

  • 发表日期：

    2025年4月16日

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  • Jatin Aggarwal,
  • Rimaljeet Kaur,
  • Amandeep Mittal,
  • Chhaya Atri,
  • Mehak Gupta,
  • Anju Sharma

摘要

Pest infestation on crops trigger high cellular oxidative stress. The strong indicator of oxidative stress initiation are lipoxgenases. We attempted to examine the status of LOX 2 gene and its encoded protein in B. juncea- B. fruticulosa derived lines against Lipaphis erysimi infestation. Cultivated brassicas display lack of resistance against mustard aphid infestation. Brassica fruticulosa, a wild crucifer is a source of enriched resistance gene pool. LOX 2 activity and LOX2 gene expression fold changes were higher in resistant genotypes than susceptible genotypes following 48 h (9.79 and 6.52 fold, respectively) of aphid infestation. Highly resistant test genotype, B. fruticulosa and resistant IL Ad4-64 displayed 1.87 and 3.83-fold decline in malondialdehyde content at 48 h post-infestation. We depicted pivotal role of LOX 2 in resistance during Brassica-mustard aphid interactions which has not been documented so far.