Scholarlink

<p>The purpose of this study was to evaluate differential responses in the activity of plant defense enzymes (such as polyphenol oxidase, peroxidase, phenylalanine ammonia-lyase, catalase and superoxide dismutase) and the concentration of hydrogen peroxide and total phenols from the leaves of two cabbage (<i>Brassica oleracea</i> var <i>capitata</i> L.) cultivars (moderately resistant ‘Lucky Ball’ and susceptible cabbage ‘Green Express’) after infestation by 4th instar <i>Plutella xylostella</i> (L.) larvae. The parameters were quantified at 0, 6, 12, 24, 48, 72, and 96&#xa0;hours after infestation. Higher activities of plant defense enzymes and total phenol and hydrogen peroxide concentration were observed from the infested plants of ‘Lucky Ball’ than ‘Green Express’. An increase of 20.03% in phenylalanine ammonia-lyase activity was observed among <i>P. xylostella-</i>infested plants of cultivar ‘Lucky Ball’ as compared to infested plants of cultivar ‘Green Express’. A higher concentration of hydrogen peroxide (25.38%) and total phenol (15.15%) was observed in the infested plants of the moderately resistant cultivar ‘Lucky Ball’ than the susceptible cultivar ‘Green Express’. The phenylalanine ammonia-lyase enzyme activity exhibited a significant, positive correlation with the total phenol concentration. The catalase activity and half maximal inhibitory concentration values of superoxide dismutase showed a significant, negative correlation with hydrogen peroxide concentration in <i>P. xylostella</i> infested leaves. The plant defense enzymes (phenylalanine ammonia-lyase, catalase, superoxide dismutase) and total phenol and hydrogen peroxide concentration may be utilised as biochemical markers for identifying resistance or susceptibility to <i>P. xylostella</i> in cabbage cultivars.</p> Graphical abstract <p></p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Role of plant defense enzymes, H2O2 and phenolics in resistance of cabbage cultivars to Plutella xylostella (L.)

  • 期刊论文

  • 发表日期：

    2025年11月15日

查看全文
  • Prasun Karmakar,
  • Soumita Pal,
  • Gautam Chakraborty

摘要

The purpose of this study was to evaluate differential responses in the activity of plant defense enzymes (such as polyphenol oxidase, peroxidase, phenylalanine ammonia-lyase, catalase and superoxide dismutase) and the concentration of hydrogen peroxide and total phenols from the leaves of two cabbage (Brassica oleracea var capitata L.) cultivars (moderately resistant ‘Lucky Ball’ and susceptible cabbage ‘Green Express’) after infestation by 4th instar Plutella xylostella (L.) larvae. The parameters were quantified at 0, 6, 12, 24, 48, 72, and 96 hours after infestation. Higher activities of plant defense enzymes and total phenol and hydrogen peroxide concentration were observed from the infested plants of ‘Lucky Ball’ than ‘Green Express’. An increase of 20.03% in phenylalanine ammonia-lyase activity was observed among P. xylostella-infested plants of cultivar ‘Lucky Ball’ as compared to infested plants of cultivar ‘Green Express’. A higher concentration of hydrogen peroxide (25.38%) and total phenol (15.15%) was observed in the infested plants of the moderately resistant cultivar ‘Lucky Ball’ than the susceptible cultivar ‘Green Express’. The phenylalanine ammonia-lyase enzyme activity exhibited a significant, positive correlation with the total phenol concentration. The catalase activity and half maximal inhibitory concentration values of superoxide dismutase showed a significant, negative correlation with hydrogen peroxide concentration in P. xylostella infested leaves. The plant defense enzymes (phenylalanine ammonia-lyase, catalase, superoxide dismutase) and total phenol and hydrogen peroxide concentration may be utilised as biochemical markers for identifying resistance or susceptibility to P. xylostella in cabbage cultivars.

Graphical abstract