[Effects of seed priming on drought tolerence in Prunella vulgaris].
OBJECTIVE
To explore an effective way to increase drought tolerance of Prunella vulgaris seed.


METHODS
The treatment of drought stress to P. vulgaris seeds was made by the different concentrations of PEG solutions. Primed seeds germinated under 25% PEG.


RESULTS
As concentrations of PEG increasing, seed germination percentage, germination index and vitality index reduced. Primed with 20%-25% PEG, 300-500 mg x L(-1) GA3 and 1.6%-2.0% KNO3-KH2PO4 could enhance three population seeds germination index and vitality index under drought stress. Treated with NaCl, seeds germination percentage and germination index of two population increased, which came from Nanjing Zijinshan and Anhui Jinzhai, respectively, while those of seeds from Gansu Chengxian reduced.


CONCLUSIONS
Treated with PEG, GA3, KNO3-KH2 PO4 under proper concentration, seed vigor, seed resistance under drought stress would increase.
Guo
Qiaosheng
Q
Institute of Chinese Medicinal Materials, Nanjing Agricultural University, Nanjing 210095, China. gqs@njau.edu.cn
Zhang
Xianxiu
X
Shen
Xuelian
X
Chen
Yuhang
Y
D003889:Desert Climate; D055864:Droughts; D018525:Germination / Q000187:drug effects*; D007701:Kinetin / Q000494:pharmacology; D009997:Osmotic Pressure / Q000187:drug effects; D010937:Plant Growth Regulators / Q000494:pharmacology; D010940:Plant Proteins; D031347:Prunella / Q000187:drug effects* / Q000502:physiology; D012639:Seeds / Q000187:drug effects* / Q000502:physiology; D012964:Sodium / Q000494:pharmacology; D012965:Sodium Chloride / Q000494:pharmacology*; D013696:Temperature
D010937:Plant Growth Regulators; D010940:Plant Proteins; D012965:Sodium Chloride; D012964:Sodium; D007701:Kinetin