Effects of exogenous abscisic acid spraying on growth and physiology of red cluster pepper seedlings
To determine the appropriate concentration of exogenous abscisic acid(ABA)for spraying during the seedling stage of red cluster pepper,Luoyan No.9 red cluster pepper was used as the material and the leaves of 6-leaf 1-heart stage seedlings with 5,10,and 20 mg/L ABA respectively was sprayed,with water as the control(CK).The growth indicators such as plant height,stem diameter,and dry weight,as well as antioxidant enzymes Peroxidase(POD),Catalase(CAT),Superoxide dismutase(SOD)activity,Malondialdehyde(MDA)content,and soluble sugar content of red cluster pepper seedlings were measured under different concentrations of ABA treatment.The results showed that compared with CK,the seedling height,stem diameter,and dry weight were all increased after exogenous ABA spraying at different concentrations,while the relative water content of the plants remained basically unchanged.The seedlings treated with 5 mg/L ABA showed significant changes,with increased activities of POD,CAT,and SOD,decreased MDA content,and a certain increase in soluble sugar content.Based on the above results,5 mg/L ABA had a significant impact on the growth and physiological indicators of red cluster pepper seedlings.It was a suitable concentration for spraying pepper seedlings and can improve their stress resistance to a certain extent.The study results provided references for the application of exogenous ABA in the seedling stage of red cluster pepper.
red cluster pepperexogenous abscisic acidgrowth indicatorsphysiological indicatorsresilience
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NSTL
万方数据
