沈阳农业大学学报2017，Vol.48Issue(3)：265-270,6.DOI:10.3969/j.issn.1000-1700.2017.03.002
PEG、GA3和AsA对高温老化处理高粱种子的修复作用
Repairing Effects of PEG, GA3 and AsA on Aged Sorghum Seeds Treated by High Temperature
摘要
Abstract
Seed vigor is one of the i mportant indicators showing the seed quality. The vitality of the aged seeds of sorghum declines with the aging degree, resulting in the reduction of germination rate and storage capacity. The seeds of sorghum hybrids Jiza 123 and Jiza 127 were used as experimental materials, which were treated under the condition of temperature (50±2) ℃, relative humidity 100% for 2, 4, 6 and 8 d, respectively, for artificial aging treatment. The artificially aged sorghum seeds were then treated with 20% PEG, 500 mg·L-1 GA3 and 500 mg·L-1AsA solutions respectively for seed repairing to determine the effect of different repairing methods on the germination characteristics of aged sorghum seeds. The germination parameters were all improved by the 3 repairing reagents. The germination rate, germination potential, germination index and vigor index of sorghum seeds were all significantly different (p<0.01) from those of the CK after treatment with each of the 3 repairing methods, with the best improvement for the germination rate. After repair treatment, the germination rate of sorghum hybrid Jiza 123 aging seeds was 1.56 times higher compared to the CK, the germination rate of sorghum hybrid Jiza 127 aging seeds was 79% higher compared to CK, with higher degree of aging repair effect for more aged seeds. The seeds of two sorghum hybrids responded differently to the different repairing agents. After treatment with each of the 3 kinds of repairing methods, the electrical conductivity, MDA content and soluble sugar content of Jiza 123 and Jiza 127 decreased, while POD activity increased to a certain extent. The changes of the parameters reflected the physiological mechanisms of seed repair. For the comprehensive indicators, AsA is the best reagent for repairing the aged sorghum seeds, followed by PEG. Meanwhile, AsA is also cheaper in price, therefore is a kind of good repairing reagent in the practical and economic consideration.关键词
高粱种子/人工老化/修复处理/萌发特性Key words
sorghum seed/artificial aging/repairing treatment/germination characteristics分类
农业科技引用本文复制引用
张姣,韩熠,孙韵璧,吴奇,孙飞,赵子川,艾雪莹,周宇飞,黄瑞冬..PEG、GA3和AsA对高温老化处理高粱种子的修复作用[J].沈阳农业大学学报,2017,48(3):265-270,6.基金项目
国家现代农业产业技术体系建设专项项目(CARS- 06- 02- 02) （CARS- 06- 02- 02）
国家"十二五"科技支撑计划项目(2014BAD07B02) （2014BAD07B02）
辽宁省教育厅一般项目(L2014271) （L2014271）
