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《Acta Agrestia Sinica》 2017-04
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Effects of 5-ALA on Seed Germination and Growth of Poa pratensis under Abiotic Stress

LIN Yan-yan;YANG Xue-mei;YANG Yun-gui;College of Animal Science and Technology,Northwest A& F University;  
This trial was aimed to investigate the effects of different concentrations of 5-aminolevulinic acid(5-ALA)on seed germination and seedling growth of Poa pratensis under Cd stress,salt stress and drought stress with germination test.Poa pratensis ‘Midnight'was used as the plant material,and five different concentrations of 5-ALA(0,5,25,50,100 mg·L~(-1))were applied to the treatment of Cd(2 mg·L~(-1)),NaCl(50 mmol·L~(-1))and PEG(15%).Germination energy,germination rate,soluble protein and other indexes were analyzed.The results showed that the germination energy,germination rates,bud length and root length increased with the lower concentrations(5,25 mg·L~(-1))of 5-ALA,and they were inhibited at the higher concentrations(5,100 mg·L~(-1)).The best concentration was 25 mg·L~(-1) after a general comparison among five concentrations of 5-ALA.Under this concentration,germination energy and germination rates were increased by 21%and 33.67%respectively compared with the control under Cd stress.Under salt stress,germination energy and germination rates were increased by 22.67% and23.67%respectively,and the two indexes were increased by 15.33% and 10.67% respectively under drought stress.In addition,soluble protein content was significantly increased by 6.5μg·g-1,3.8μg·g-1 when the seedling was under salt or drought stress.As for Cd stress,soluble protein content was improved,but the influence was not significant.
【Fund】: 国家牧草产业技术体系“优质牧草产品标准化生产关键技术”(CASR-35-01A);; 草业生产实践案例库(ALK201517)资助
【CateGory Index】: S688.4
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