现代食品科技2026，Vol.42Issue(1)：170-180,11.DOI:10.13982/j.mfst.1673-9078.2026.1.1595
外源IAA处理对采后上海青色泽品质及抗氧化活性的影响
Effect of An Exogenous IAA Treatment on the Color Quality and Antioxidant Activity of Postharvest Shanghai Pak Choi
摘要
Abstract
In order to clarify the effects of exogenously applied indoleacetic acid(IAA)on postharvest Shanghai pak choi,distilled water spraying was used as a control group in this study,the changes in chlorophyll content,chlorophyll metabolism-related gene expression and enzyme activities,IAA metabolic pathway-related gene expression,endogenous hormone content,and antioxidant-related gene expression and enzyme activities during the senescence process of postharvest pak choi were investigated.It was found that the colour quality of postharvest pak choi was effectively maintained and its leaf senescence was delayed by exogenous application of IAA at 2 mg/L,mainly by reducing the expression of chlorophyll metabolism-related genes(BrNYC1,BrNOL,BrPPH,BrPAO,BrSGR1,and BrSRG2)and enzyme activities(PPH,PAO,and MDcase)to delay the degradation of chlorophyll.Meanwhile,the expression of growth hormone signalling transduction pathway-related genes(BrARF2,BrARF7,BrARF19,BrGH3.5,BrGH3.12,and BrGH3.17)could be regulated by IAA to maintain the endogenous IAA content in postharvest pak choi.In addition,the IAA treatment could increase the expression of antioxidant metabolism-related genes(BrCAT,BrPOD,and BrSOD)to increase the activities of antioxidant enzymes,catalase(CAT),peroxidase(POD),and superoxide dismutase(SOD)and enhance the antioxidant properties of postharvest pak choi.In summary,an exogenous IAA treatment can effectively maintain the colour quality of pak choi and delay its leaf senescence.These findings of this study provide a basis for the development of postharvest technologies for Shanghai pak choi.关键词
上海青/IAA/采后/叶绿素/抗氧化/基因Key words
pak choi/IAA/postharvest/chlorophyll/antioxidant/gene引用本文复制引用
徐晓阳,朱祎然,马文琪,李鹏霞..外源IAA处理对采后上海青色泽品质及抗氧化活性的影响[J].现代食品科技,2026,42(1):170-180,11.基金项目
江苏省现代农业-面上项目(BE2022368) （BE2022368）
