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首页> 外文期刊>American journal of applied sciences >Growth Enhancement and Disease Reduction of Soybean by 1-Aminocyclopropane-l-Carboxylate Deaminase-Producing Pseudomonas
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Growth Enhancement and Disease Reduction of Soybean by 1-Aminocyclopropane-l-Carboxylate Deaminase-Producing Pseudomonas

机译：产生1-氨基环丙烷-1-羧酸脱氨酶的假单胞菌对大豆的生长促进和疾病缓解

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Problem statement: 1-Aminocyclopropane-l-Carboxylate (ACC) deaminase-producing bacteria have been known to ameliorate the inhibition-effect of increase concentration of ethylene in higher plants, which can be triggered by high concentration of indole-3-Acetic Acid (IAA) and/or by the presence of plant pathogens. This study examined the potential use of Pseudomonas isolates producing ACC deaminase as well as IAA to enhance soybean growth and reduce disease incidence in soil containing pathogenic fungi. Approach: Eleven promising ACC deaminase-producing isolates of Pseudomonas were retested in vitro for their ACC deaminase activity and IAA production and evaluated their potential antagonist against root-nodule bacteria. Non antagonist isolates were further tested for their ability to enhance soybean growth and reduce disease incidence in sterile and non-sterile soils containing root-pathogenic fungi Fusarium oxysporum, Sclerotium rolfsii and Rhizoctonia solani. Results: All isolates produced ACC deaminase as well as IAA, but 3 out of 11 isolates inhibited at least one strain of rhizobia which limit their use for soybean. The isolates increased some aspects of soybean growth, but most of the increases were not significantly different from untreated control. Most isolates significantly increased the survival rates of soybean in soil containing pathogenic fungi although their ability to reduce plant weight loss varied across pathogen treatments. Conclusion: The ability of Pseudomonas producing ACC deaminase as well as IAA to increase plant growth was less significant than that of the isolates to reduce disease incidence. The higher the destructive effect of the pathogens, the better was the ability of the isolates to reduce the disease.
机译：问题陈述：已知产生1-氨基环丙烷-1-羧酸（ACC）脱氨酶的细菌可改善高等植物中乙烯浓度升高的抑制作用，这可由高浓度的吲哚-3-乙酸（ IAA）和/或存在植物病原体。这项研究检查了产生ACC脱氨酶的假单胞菌分离物以及IAA在提高大豆生长和减少含致病真菌的土壤中的疾病发生率方面的潜在用途。方法：在体外对11种有前景的假单胞菌产生ACC脱氨酶的菌株进行了ACC脱氨酶活性和IAA产生的体外测试，并评估了它们对根瘤细菌的潜在拮抗剂。进一步测试了非拮抗菌株在含有根致病性真菌尖孢镰刀菌，罗勒菌和立枯丝核菌的无菌和非无菌土壤中增强大豆生长和降低疾病发生率的能力。结果：所有分离株均产生ACC脱氨酶和IAA，但11个分离株中有3个抑制至少一种根瘤菌菌株，这限制了它们对大豆的使用。分离株增加了大豆生长的某些方面，但大多数增加与未处理的对照无显着差异。大多数分离株显着提高了大豆在含有致病真菌的土壤中的存活率，尽管它们减少植物失重的能力因病原体处理而异。结论：假单胞菌产生ACC脱氨酶和IAA促进植物生长的能力不如分离株降低疾病发生率的显着。病原体的破坏作用越高，分离物减少疾病的能力就越好。

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