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Volatile organic compounds produced by Pseudomonas pseudoalcaligenes alleviated drought stress by modulating defence system in Maize ( Zea mays L.)
Physiologia Plantarum ( IF 6.4 ) Pub Date : 2021-01-05 , DOI: 10.1111/ppl.13304
Humaira Yasmin 1 , Urooj Rashid 1 , Muhammad Nadeem Hassan 1 , Asia Nosheen 1 , Rabia Naz 1 , Noshin Ilyas 2 , Muhammad Sajjad 1 , Ammar Azmat 1 , Mohammed Nasser Alyemeni 3
Affiliation  

Research on plant growth-promoting bacteria (PGPR) revealed an effective role of bacterial volatile organic compounds (VOCs) in stress alleviation. Out of 15 PGPR strains, infection with VOCs from P. pseudoalcaligenes' resulted in maximum germination, growth promotion, and drought tolerance in maize plants. The VOCs of P. pseudoalcaligenes caused induced systemic tolerance in maize plants during 7 days of drought stress. The VOCs exposed plants displayed resistance to drought stress by reducing electrolyte leakage and malondialdehyde content and increasing the synthesis of photosynthetic pigments, proline, and phytohormones contents. Maize plants revealed enhanced resistance by showing higher activities of antioxidant defence enzymes both in shoots and roots under drought stress. Activities of antioxidant enzymes were more pronounced in shoots than roots. Gas chromatography and mass spectrophotometric (GC-MS) analysis comparing VOCs produced by the most efficient P. pseudoalcaligenes strain and inefficient strains of Pseudomonas sp. grown in culture media revealed nine compounds that they had in common. However, dimethyl disulfide, 2,3-butanediol, and 2-pentylfuran were detected only in P. pseudoalcaligenes, indicating these compounds are potential candidates for drought stress induction. Further studies are needed to unravel the molecular mechanisms of VOCs mediated systemic drought tolerance in plants related to each identified VOC. This article is protected by copyright. All rights reserved.

中文翻译:

Pseudomonas pseudoalcaligenes 产生的挥发性有机化合物通过调节玉米 (Zea mays L.) 的防御系统缓解干旱胁迫

对植物生长促进细菌 (PGPR) 的研究揭示了细菌挥发性有机化合物 (VOC) 在缓解压力方面的有效作用。在 15 个 PGPR 菌株中,来自 P.pseudoalcaligenes 的 VOC 感染导致玉米植物的最大发芽、生长促进和耐旱性。P.pseudoalcaligenes 的 VOC 在干旱胁迫 7 天期间引起玉米植物诱导的系统耐受性。暴露于 VOC 的植物通过减少电解质泄漏和丙二醛含量以及增加光合色素、脯氨酸和植物激素含量的合成,显示出对干旱胁迫的抵抗力。玉米植物在干旱胁迫下,通过在芽和根中表现出更高的抗氧化防御酶活性,显示出增强的抗性。抗氧化酶的活性在芽中比根中更显着。气相色谱和质谱 (GC-MS) 分析比较了最有效的假产碱假单胞菌菌株和低效假单胞菌菌株产生的 VOC。在培养基中生长揭示了它们共有的九种化合物。然而,仅在假产碱假单胞菌中检测到二甲基二硫醚、2,3-丁二醇和 2-戊基呋喃,表明这些化合物是诱导干旱胁迫的潜在候选物。需要进一步的研究来解开 VOC 介导的与每种已识别 VOC 相关的植物系统性耐旱性的分子机制。本文受版权保护。版权所有。假单胞菌属的假产碱菌菌株和低效菌株。在培养基中生长揭示了它们共有的九种化合物。然而,仅在假产碱假单胞菌中检测到二甲基二硫醚、2,3-丁二醇和 2-戊基呋喃,表明这些化合物是诱导干旱胁迫的潜在候选物。需要进一步的研究来解开 VOCs 介导的与每种已识别 VOC 相关的植物系统性耐旱性的分子机制。本文受版权保护。版权所有。假单胞菌属的假产碱菌菌株和低效菌株。在培养基中生长揭示了它们共有的九种化合物。然而,仅在假产碱假单胞菌中检测到二甲基二硫醚、2,3-丁二醇和 2-戊基呋喃,表明这些化合物是诱导干旱胁迫的潜在候选物。需要进一步的研究来解开 VOCs 介导的与每种已识别 VOC 相关的植物系统性耐旱性的分子机制。本文受版权保护。版权所有。表明这些化合物是诱导干旱胁迫的潜在候选物。需要进一步的研究来解开 VOCs 介导的与每种已识别 VOC 相关的植物系统性耐旱性的分子机制。本文受版权保护。版权所有。表明这些化合物是诱导干旱胁迫的潜在候选物。需要进一步的研究来解开 VOCs 介导的与每种已识别 VOC 相关的植物系统性耐旱性的分子机制。本文受版权保护。版权所有。
更新日期:2021-01-05
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