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首页> 外文期刊>Plant Physiology and Biochemistry >Ethylene emission and PR protein synthesis in ACC deaminase producing Methylobacterium spp. inoculated tomato plants (Lycopersicon esculentum Mill.) challenged with Ralstonia solanacearum under greenhouse conditions
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Ethylene emission and PR protein synthesis in ACC deaminase producing Methylobacterium spp. inoculated tomato plants (Lycopersicon esculentum Mill.) challenged with Ralstonia solanacearum under greenhouse conditions

机译：ACC脱氨酶生产甲基杆菌属中的乙烯释放和PR蛋白合成。温室条件下用番茄青枯菌（Ralstonia solanacearum）攻击番茄接种的番茄植物（Lycopersicon esculentum Mill。）

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Bacteria of genus Methylobacterium have been found to promote plant growth and regulate the level of ethylene in crop plants. This work is aimed to test the induction of defense responses in tomato against bacterial wilt by stress ethylene level reduction mediated by the ACC deaminase activity of Methylobacterium strains. Under greenhouse conditions, the disease index value in Methylobacterium sp. inoculated tomato plants was lower than control plants. Plants treated with Methylobacterium sp. challenge inoculated with Ralstonia solanacearum (RS) showed significantly reduced disease symptoms and lowered ethylene emission under greenhouse condition. The ACC and ACO (1-aminocyclopropane-1-carboxylate oxidase) accumulation in tomato leaves were significantly reduced with Methylobacterium strains inoculation. While ACC oxidase gene expression was found higher in plants treated with R. solanacearum than Methylobacterium sp. treatment, PR proteins related to induced systemic resistance like β-1,3-glucanase, PAL, PO and PPO were increased in Methylobacterium sp. inoculated plants. A significant increase in β-1,3-glucanase and PAL gene expression was found in all the Methylobacterium spp. treatments compared to the R. solanacearum treatment. This study confirms the activity of Methylobacterium sp. in increasing the defense enzymes by modulating the ethylene biosynthesis pathway and suggests the use of methylotrophic bacteria as potential biocontrol agents in tomato cultivation.
机译：已经发现甲基杆菌属细菌可促进植物生长并调节农作物中乙烯的水平。这项工作旨在测试由甲基菌株菌株的ACC脱氨酶活性介导的胁迫乙烯水平降低，从而诱导番茄对细菌枯萎的防御反应的诱导。在温室条件下，该病指数在甲基杆菌属中。接种的番茄植株低于对照植株。用甲基杆菌属种处理过的植物。在温室条件下，接种青枯雷尔氏菌（RS）的挑战显示出明显减轻的疾病症状并降低了乙烯排放。接种甲基杆菌菌株后，番茄叶片中的ACC和ACO（1-氨基环丙烷-1-羧酸氧化酶）的积累显着降低。虽然在青枯雷尔氏菌处理过的植物中发现ACC氧化酶基因表达高于甲基杆菌属。在甲基杆菌属中，与诱导的系统抗性相关的PR蛋白（如β-1,3-葡聚糖酶，PAL，PO和PPO）增加。接种的植物。在所有甲基杆菌属菌种中都发现β-1,3-葡聚糖酶和PAL基因表达显着增加。治疗与青枯菌治疗相比。这项研究证实了甲基杆菌的活性。通过调节乙烯的生物合成途径来增加防御酶，并建议使用甲基营养菌作为番茄栽培中潜在的生物防治剂。

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