|Table of Contents|

Effects of Drought Stress on Seed Germination and Evaluation of Drought Resistance in Bud Stage of Stay-green Soybean(PDF)

《大豆科学》[ISSN:1000-9841/CN:23-1227/S]

Issue:
2021年01期
Page:
68-74
Research Field:
Publishing date:

Info

Title:
Effects of Drought Stress on Seed Germination and Evaluation of Drought Resistance in Bud Stage of Stay-green Soybean
Author(s):
WANG Peng HOU Si-yu WEN Hong-wei LI Gui-quan
(1.College of Agriculture, Shanxi Agricultural University, Taigu 030801, China; 2.Institute of Agricultural Biotechnology, Shanxi Agricultural University, Taigu 030801, China)
Keywords:
Stay-green variety PEG osmotic stress Germination traits Drought resistance in bud stage
PACS:
-
DOI:
10.11861/j.issn.1000-9841.2021.01.0068
Abstract:
To study the effect of drought stress on the seed germination of stay-green soybean, the germination characteristics of different soybean seeds were compared and analyzed under PEG osmotic stress, and their drought resistance were evaluated comprehensively. The results showed that the stay-green soybean could maintain higher water absorption rate in the middle and late stage of PEG stress, and the time of loss water delayed 6-12 h compared with the common variety Jinda 74. PEG osmotic stress significantly reduced the germination rate, germination energy, radicle length, hypocotyl length, radicle dry (fresh) weight and the storage substance transportation rate of soybean seeds. Stay-green mutant stg had the highest water absorption rate but the weakest germination rate under PEG osmotic stress. The relative germination energy, relative germination rate and relative germination index ofM9were all higher than those of the other varieties (lines). The root elongation of the common variety Jinda 74 was the most affected by PEG osmotic stress, and the relative hypocotyl length and relative radicle length were significantly lower than those of the other varieties (lines). The relative radicle length and relative radicle length/relative hypocotyl length ratio of Jinda stay-green 1 were 0.82 and 2.38 respectively, significantly higher than those of the other varieties (lines), indicating that it priority to promoted radicle elongation under PEG stress. The evaluation on drought resistance using subordinate function values showed that stay-green was a type of strong drought resistance and Jinda stay-green 1 was a type of medium drought resistance. The results of this study are significant to the soybean germplasm innovation and the breeding of drought-resistant varieties.

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Last Update: 2021-02-09