Welcome to Journal of Agriculture,

Journal of Agriculture ›› 2018, Vol. 8 ›› Issue (6): 58-61.doi: 10.11923/j.issn.2095-4050.cjas17100001

Special Issue: 农业气象

Previous Articles     Next Articles

Drought Stress and Temperature Change Affect Seed Germination Characteristics of Platycodon Grandiflorum

  

  • Received:2017-10-09 Revised:2017-12-11 Accepted:2017-12-22 Online:2018-06-26 Published:2018-06-26

Abstract: The objectives are to provide the technical support for seed germination of Platycodon Grandiflorum, and technical reference for demonstration and popularization of new lines of Platycodon Grandiflorum. The seeds of Platycodon Grandiflorum were used as materials, four PEG-6000 treatments [5% PEG-6000(H1), 10% PEG-6000(H2), 15% PEG-6000(H3) and distilled water (CK)] and three temperature treatments [15℃(T1), 20℃(T2), 25℃(T3)] were set up. The seeds were cultivated with light culture (12 h light/ 12 h dark), and then the germination rate and germination potential was detected. The results showed that different drought stresses (PEG concentration) and temperature change affected the seed germination time, germination rate and germination potential significantly. Under different temperature, the germination rate decreased gradually with the drought stress increase. Low temperature was bad for the seed germination, the initiatory time of seed germination was delayed and the germination rate began to decrease when the temperature was below 15℃, or the degree of drought was more than 15% PEG. When the drought stress was below 5% PEG, the germination of Platycodon grandiflorum was good at the temperature of 20℃ and 25℃.