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首页> 外文期刊>African Journal of Biotechnology >Induction of phenolics, lignin and key defense enzymes in eggplant (Solanum melongena L.) roots in response to elicitors
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Induction of phenolics, lignin and key defense enzymes in eggplant (Solanum melongena L.) roots in response to elicitors

机译：诱导子对茄子（Solanum melongena L.）根中酚类，木质素和关键防御酶的诱导

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摘要

Elicitors are capable of mimicking the perception of a pathogen by a plant, thereby triggering induction of a sophisticated defense response in plants. In this study, we investigated an induced resistance in eggplant in respect to cell wall strengthening and defense enzyme activation affected by four elicitors such as, chitosan (CHT), salicylic acid (SA), methyl salicylate (MeSA) and methyl jasmonate (MeJA). The increase in total phenolic content of eggplant roots by the elicitors was significantly higher. Lignin deposition in the cell wall of eggplant roots was increased 5, 4, 3 and 3 times by SA, CHT, MeJA and MeSA at 96 h of elicitation, respectively. Phenylalanine ammonia-lyase (PAL) activity showed an increase of 4.7, 3.7, 3.5 and 3.2 times by SA, CHT, MeJA and MeSA at 36 h of elicitation, respectively. Highest activity of peroxidase (POD) was observed at 24 h after elicitation under the precise influence of CHT and SA. The activities of polyphenol oxidase (PPO), cinnamyl alcohol dehydrogenase (CAD) and catalase (CAT) were also increased several folds by the elicitors. Accumulation of phenolics and lignin in high amounts, together with higher level activity of major defense enzymes in response to the elicitors, may bolster eggplants in mounting practical and effective resistance against?Ralstonia solanacearum, the devastating wilt pathogen.
机译：引发剂能够模仿植物对病原体的感知，从而触发植物中复杂防御反应的诱导。在这项研究中，我们调查了茄子对壳壁（CHT），水杨酸（SA），水杨酸甲酯（MeSA）和茉莉酸甲酯（MeJA）等四种引发剂影响的细胞壁增强和防御酶激活的诱导抗性。 。引发剂对茄子根中总酚含量的增加明显更高。 SA，CHT，MeJA和MeSA分别在诱导96 h时使茄子根细胞壁中的木质素沉积增加了5、4、3和3倍。 SA，CHT，MeJA和MeSA在诱导36 h时，苯丙氨酸氨解酶（PAL）活性分别增加了4.7、3.7、3.5和3.2倍。在CHT和SA的精确影响下，诱导后24小时观察到最高的过氧化物酶（POD）活性。引发剂还使多酚氧化酶（PPO），肉桂醇脱氢酶（CAD）和过氧化氢酶（CAT）的活性增加了几倍。大量的酚类和木质素的积累，以及主要的防御酶对激发子的较高活性，可能增强茄子对毁灭性枯萎病菌青枯雷尔氏菌的实用和有效抗性。

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