| Drought is an important limiting factor on peanut production in Guangxi. The objective was to select peanut varieties that were more tolerant in dry area. This paper studied the effects of drought stress on the growth and physiological characteristics of Guangxi peanut variety 渊strain冤in seedling stage, and preliminarily selected peanut varieties (lines) that were more tolerant for drought resistant in Guangxi. In this study, we selected 11 main planting peanut varieties of Guangxi and new breeding peanut strains, and planted peanut in the pot with the artificial rain canopy, we treated the normal watering as control, and treated the artificial water control as the drought stress. When drought stress happened 30d, determined peanut seedling height, lateral branches length, biomass, chlorophyll, soluble sugar, proline and malondialdehyde contents, and analyzed the relative inhibitory of peanut growth and physiological characteristics of peanut
seedling. The plant growth of all peanut varieties were inhibited under drought stress, the growth inhibition of Guihua819 variety was the least, and its peanut drought membership function was the most. It showed that drought tolerance of Guihua819 in seedling growth was the strongest袁followed by Guihuahong166, Guihua26 and Guihua22. The chlorophyll, soluble sugar, proline and malondialdehyde contents in majority of peanut varieties increased under drought stress, while a few peanut varieties showed decreasing trend. The increasing extents of chlorophyll and proline of Guihua819 were the most in all vavieties （strains), while malondialdehyde contents and soluble sugar of Guihua819 also largely increased. |
