Effect of Hormone Priming on Germination Characteristics and Enzyme Activity of Mountain Rye (Secale montanum) Seeds under Drought Stress Conditions

Journal of Stress Physiology & Biochemistry

关键词: Hormone priming;    Seed germination;    Drought stress;    Enzyme activity;    Secale montanum;   

DOI  :  

来源: DOAJ

【 摘 要 】

Seedprimingtechniqueshavebeenusedtoincreasegermination,improvegermination uniformity and seedling establishment under stressed conditions. Seed priming was used in RyeMountain(Secalemontanum)toincreaseseedgerminationandtoleranceonstress exposure.Ryeseedsweretreatedwithvariousprimingagentsfordifferenttimeand temperatures.Theeffectofprimingwasassessedongerminationcharacteristicson subsequent exposure to drought (PEG -14 bar) stress for 7 days. Seed priming treatments significantly (p≤ 0.01) affected, Germination percentage (GP), normality seedling percentage (NSP), germination Index (GI),germination uniformity (GU), means time to germination (MTG), coefficient of velocity of germination (CVG),seedling vigour index (SVI) and coefficient of allometry (AC). Seed priming with gibberelic acid (GA) and salicylic acid (SA) (p≤ 0.01) increased germinationcharacteristicsasthecomparedtotheunprimed.Seedprimingwith concentrations 25, 50 ppm of GA for 15 h at 10 °C and 25 ppm of SA for 12 h at 10 °C,may be considered as optimal treatment for priming ofSecale montanum seeds in drought stress conditions. Also priming increased catalase (CAT) and ascorbate peroxidase (APX) as compared to the unprimed.

【 授权许可】

Unknown