Endophytic bacteria (Sphingomonas sp LK11) and gibberellin can improve Solanum lycopersicum growth and oxidative stress under salinity
Endophytic bacteria (Sphingomonas sp LK11) and gibberellin can improve Solanum lycopersicum growth and oxidative stress under salinity
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DOI：
10.1080/17429145.2015.1033659
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发表时间：
2015-01-01
影响因子：
3.2
通讯作者：
Lee, In-Jung
中科院分区：
文献类型：
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作者：
Halo, Boshra Ahmed;Khan, Abdul Latif;Lee, In-Jung
本研究旨在了解盐度对内生细菌（Sphingomonas sp. LK11）和番茄植株生长和氧化应激酶的影响。与过氧化物酶（POD）和多酚氧化酶（PPO）相比，盐度和赤霉素（GA4）对LK11过氧化氢酶（CAT）、超氧化物歧化酶（superoxide dismutase）和还原性谷胱甘肽的影响显著。盐胁迫导致番茄植株生长和生物量明显停止，脂质过氧化增加3倍，谷胱甘肽、CAT、POD和PPO活性降低。相比之下，单独和联合处理LK11和GA4在盐度胁迫下恢复了植物的生长和生物量，同时表现出较低的脂质过氧化和谷胱甘肽含量。与对照组相比，CAT、POD和PPO活性降低或不显著。综上所述，已知的植物生长调节剂证明，接种细菌内生菌具有相对的抗逆性。
This study aims to understand the effects of salinity on the growth and oxidative stress enzymes of endophytic bacteria (Sphingomonas sp. LK11) and tomato plants. In response to salinity and gibberellic acid (GA4), catalase (CAT), superoxide dismutase, and reduced glutathione were significantly regulated in LK11 as compared to peroxidase (POD) and polyphenol oxidase (PPO). Salinity stress to tomato plants caused significant cessation in growth and biomass, which was accompanied by threefold increase in lipid peroxidation and decrease in glutathione, CAT, POD, and PPO activities. In contrast, sole and combined treatment of LK11 and GA4 rescued plant growth and biomass production whilst exhibited lower lipid peroxidation and higher glutathione content under salinity stress. The activities of CAT, POD, and PPO were either lower or nonsignificant as compared to control. In conclusion, inoculation of bacterial endophytes offers a relative stress counteracting potentials as evidenced by the known plant growth regulators.