期刊
SCIENTIA HORTICULTURAE
卷 176, 期 -, 页码 143-150出版社
ELSEVIER
DOI: 10.1016/j.scienta.2014.06.032
关键词
PGPB; ACC deaminase; Growth promoting; Nutrient uptake; Antioxidant system
类别
资金
- National Natural Science Foundation of China [31071623, 31272215]
- National Basic Research Program of China [2013CB127106]
This study investigated the effects of inoculation with selected 1-aminocyclopropane-1-carboxylate (ACC) deaminase-producing endophytic bacterium TPs-04 on growth promoting, nutrient uptake and antioxidant system of tomato (Solanum lycopersicum L.) seedlings under low night temperature (LNT, i.e., 6, 9 and 15 degrees C). Growth and nutrient uptake of tomato seedlings was reduced under different LNT stress level. Inoculation with strain TPs-04 significantly increased the length and dry weight of root and shoot, and chlorophyll content of leaves. Further analysis showed that it could enhance the uptake of N, P and K. The improvement of seedling growth might due to the plant growth promoting traits such as siderophore production, phosphorous solubilization, nitrogen fixation and ACC deaminase production indicated by TPs-04. Chilling stress resulted in rapid accumulation of hydrogen peroxide (H2O2) and malondialdehyde (MDA). Moreover, severe LNT (6 degrees C) raised the antioxidant enzyme activities compared to 9 and 15 degrees C treatments. The selected strain TPs-04 induced a higher increase in these antioxidant enzyme activities, and substantially decreased the accumulation of H2O2 and MDA in response to night chilling stress. Strain TPs-04 might be used as a potential bioinoculant of tomato plants protection under night chilling stress. (C) 2014 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据