Effect of Salicylic Acid Priming on Physiological Indexes of Maize Seed during Seed Imbibition under Low Temperature
GAO Qiaohong
DING Xizheng
NIU Zhihao
HUANG Tingting
CAO Gaoyi
XIANG Chunyang
ZHAO Fei
DU Jin
Abstract：In order to investigate how salicylic acid(SA) priming affect the physiological indexes of maize seed(embryo,endosperm and seed coat) during seed imbibition under low temperature,maize hybrid Zhengdan 958 was used as materials in this study,and the seeds were primed with 0.1 mmol/L SA for 36 h,subsequently manipulated by imbibition duration for 0,12,24,36,48 h under 15 ℃ respectively.The results indicated that SA priming significantly increased seed germination rate.The nucleic acid content in seed leakage decreased at first and then increased with prolonged imbibition time.Similarly,the soluble sugar content of embryo decreased at first and then increased.While POD activity of endosperm gradually increased,and CAT activity of seed coat increased at first and then decreased.Compared with no primed seed,during the majority of seed imbibition time,SA priming treatment could significantly increase the soluble sugar content of endosperm and seed coat,improve the soluble protein content of embryo and seed coat,enhance the CAT and POD activity of endosperm and seed coat,decline the nucleic acid content in seed leakage,and thus strengthen the resistance of maize seed to chilling stress.
Keywords：salicylic acidmaizeseed primingimbibitionphysiological indexes
Publication Date：2017-03-02
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：6( 41-46 )