Endophytic bacterium Bacillus subtilis (BERA 71) improves salt tolerance in chickpea plants by regulating the plant defense mechanisms
Endophytic bacterium Bacillus subtilis (BERA 71) improves salt tolerance in chickpea plants by regulating the plant defense mechanisms
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DOI：
10.1080/17429145.2017.1414321
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发表时间：
2018-01-01
影响因子：
3.2
通讯作者：
Egamberdieva, Dilfuza
中科院分区：
文献类型：
--
作者：
Abd Allah, Elsayed Fathi;Alqarawi, Abdulaziz A.;Egamberdieva, Dilfuza
植物内生促生细菌可以促进鹰嘴豆植物在盐碱土壤条件下的生长、养分获取、共生性能和胁迫耐受性。本研究的目的是研究盐胁迫条件下枯草芽孢杆菌（BERA 71）介导的鹰嘴豆植物的胁迫适应机制。接种BERA 71可提高植物的生物量和光合色素的合成，并降低胁迫条件下植物体内活性氧（ROS）和脂质过氧化的水平。此外，活性的ROS清除抗氧化酶（超氧化物歧化酶，过氧化物酶，过氧化氢酶和谷胱甘肽还原酶），非酶抗氧化剂（抗坏血酸和谷胱甘肽）的水平和总酚含量增加，在胁迫植物在细菌协会。该菌降低了植物体内钠的积累，提高了氮、钾、钙和镁的含量。在盐胁迫和非胁迫条件下，接种BERA-71的植物中ROS产生和脂质过氧化以及脯氨酸积累的抑制增强了膜稳定性。
Plant growth-promoting endophytic bacteria can stimulate the growth, nutrient acquisition, symbiotic performance and stress tolerance of chickpea plants under saline soil conditions. The aim of this study was to investigate the stress-adaptive mechanisms of chickpea plants mediated by Bacillus subtilis (BERA 71) under saline conditions. Inoculation with BERA 71 enhanced plant biomass and the synthesis of photosynthetic pigments and reduced the levels of reactive oxygen species (ROS) and lipid peroxidation in plants under conditions of stress. Furthermore, the activities of ROS-scavenging antioxidant enzymes (superoxide dismutase, peroxidase, catalase and glutathione reductase), the levels of non-enzymatic antioxidants (ascorbic acid and glutathione) and the total phenol content were increased in stressed plants during bacterial association. The bacteria decreased sodium accumulation and enhanced the nitrogen, potassium, calcium and magnesium content in the plants. The suppression of ROS generation and of lipid peroxidation and the accumulation of proline in BERA-71-inoculated plants enhanced the membrane stability under salinity stress and non-stress conditions.