Plant Growth-Promoting Rhizobacteria Enhance Salinity Stress Tolerance in Okra through ROS-Scavenging Enzymes.
Plant Growth-Promoting Rhizobacteria Enhance Salinity Stress Tolerance in Okra through ROS-Scavenging Enzymes.
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DOI：
10.1155/2016/6284547
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发表时间：
2016
影响因子：
--
通讯作者：
Saud HM
中科院分区：
文献类型：
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作者：
Habib SH;Kausar H;Saud HM
盐度是限制全球作物生产的主要环境胁迫。在这项研究中，我们的特点是植物生长促进根际细菌（PGPR）含有1-氨基环丙烷-1-羧酸（ACC）脱氨酶，并通过诱导ROS清除酶的活性，在秋葵耐盐胁迫的影响。PGPR接种秋葵植株的发芽率、生长参数和叶绿素含量均高于对照植株。在盐胁迫下，PGPR接种的黄秋葵植株抗氧化酶活性（SOD、APX和CAT）增加，ROS途径基因（CAT、APX、GR和达尔）表达上调。除了一些例外，与其他处理相比，接种肠杆菌属UPMR 18对盐胁迫下的所有测试参数都有显著影响。因此，含ACC脱氨酶的PGPR菌株Enterobacter sp. UPMR 18可能是一种有效的生物资源，用于提高盐胁迫下秋葵植物的耐盐性和生长。
Salinity is a major environmental stress that limits crop production worldwide. In this study, we characterized plant growth-promoting rhizobacteria (PGPR) containing 1-aminocyclopropane-1-carboxylate (ACC) deaminase and examined their effect on salinity stress tolerance in okra through the induction of ROS-scavenging enzyme activity. PGPR inoculated okra plants exhibited higher germination percentage, growth parameters, and chlorophyll content than control plants. Increased antioxidant enzyme activities (SOD, APX, and CAT) and upregulation of ROS pathway genes (CAT, APX, GR, and DHAR) were observed in PGPR inoculated okra plants under salinity stress. With some exceptions, inoculation with Enterobacter sp. UPMR18 had a significant influence on all tested parameters under salt stress, as compared to other treatments. Thus, the ACC deaminase-containing PGPR isolate Enterobacter sp. UPMR18 could be an effective bioresource for enhancing salt tolerance and growth of okra plants under salinity stress.