Tocopherol confers water stress tolerance: Sugar and osmoprotectant metabolism in mung bean [Vigna radiata (L.) Wilczek]

被引:4
作者
Sadiq, M. [1 ]
Akram, N. A. [1 ]
Ashraf, M. [2 ,3 ]
Ali, S. [4 ]
机构
[1] Univ Faisalabad, Govt Coll, Dept Bot, Faisalabad, Pakistan
[2] Pakistan Sci Fdn, Islamabad, Pakistan
[3] King Saud Univ, Dept Bot & Microbiol, Riyadh, Saudi Arabia
[4] Univ Faisalabad, Govt Coll, Dept Environm Sci, Faisalabad, Pakistan
来源
AGROCHIMICA | 2017年 / 61卷 / 01期
关键词
gas exchange; osmoprotectants; sugars; tocopherol; water stress; VICIA-FABA L; ALPHA-TOCOPHEROL; SINGLET OXYGEN; ADAPTATION; PROLINE; PLANTS;
D O I
10.12871/0021857201713
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
The effective contribution of alpha-tocopherol (alpha-Toc) in drought stress tolerance was assessed in mung bean plants. Two mung bean cultivars (Cyclone 7008 and Cyclone 8009) were grown under non-stress (100% field capacity) and water stress (60% field capacity) conditions. Along with control (no spray), three levels of alpha-Toc (100, 200 and 300 mg L-1) were applied as foliar spray to mung bean plants at the vegetative growth stage. Exogcnously applied alpha-Toc significantly improved plant growth, chlorophyll b, relative water content, glycinebetaine (GB), reducing sugars, total soluble sugars, transpiration rate (E), stomatal conductance (g(s)), sub-stomatal CO2 concentration (C-i), and C/C-a under well-watered and water deficit conditions. However, cv. Cyclone 7008 was significantly better in reducing and non-reducing sugars, while cv. Cyclone 8009 in leaf proline concentration. Overall, exogenously applied alpha-Toc - in particular 300 mg L-1 - was effective in improving plant growth of both mung bean cultivars, which was found to be associated with alpha-Toe-induced increase in E, g(s), C-i, GB, proline and sugar contents.
引用
收藏
页码:28 / 42
页数:15
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