湖南农业大学学报（自然科学版）2025，Vol.51Issue(4)：25-37,13.DOI:10.13331/j.cnki.jhau.2025.04.004
外源EBR与ALA对湖南地区越冬辣椒幼苗生长及生理特性的影响
Effects of exogenous EBR and ALA on growth and physiology of overwintering pepper seedlings in Hunan Province
摘要
Abstract
The effects of different concentrations of exogenous 2,4-epibrassinolide(EBR)and 5-aminoacetyl propane(ALA)on the growth,antioxidant enzyme activity,osmoregulatory substance content and nitrogen metabolism key enzyme activity of overwintering pepper seedlings were studied using'Bola Red Bull''Xingshu 215'and'Changyan Qingxiang'as test materials.The results showed that exogenous EBR and ALA could enhance the ability of seedlings to resist low temperature stress to varying degrees.Compared to the water-sprayed control,the application of different concentrations of exogenous EBR and ALA improved the morphological indicators of overwintering pepper seedlings,including plant height,stem thickness,fresh weight,dry weight,and seedling vigor index.The activities of antioxidant enzymes(SOD,POD,CAT)were enhanced,and the content of osmoregulatory substances(proline,soluble sugars,soluble proteins)and the activities of key nitrogen metabolism enzymes(NR,NiR,GS)were also increased to some extent.Among them,0.01 mg/L EBR and 30.00 mg/L ALA were more effective in alleviating the damage effects of low-temperature stress on seedling physiology and growth.Based on these findings,practical application trial was conducted for overwintering pepper seedling cultivation at this concentration.The results showed that the seedling vigor index following the foliar application of 30.00 mg/L ALA plus an adjuvant was significantly higher than that in all other treatments,and the additional cost per seedling was calculated to be RMB 0.007 3.关键词
辣椒/低温逆境/2,4-表油菜素内酯/5-氨基乙酰丙酸/植物生长调节剂Key words
pepper/low temperature stress/2,4-epibrassinolide/5-aminolevulinic acid/plant growth regulator分类
农业科技引用本文复制引用
陈汉,黄科,刘峰,张文霞,胡佳未,周龙,王军伟..外源EBR与ALA对湖南地区越冬辣椒幼苗生长及生理特性的影响[J].湖南农业大学学报（自然科学版）,2025,51(4):25-37,13.基金项目
国家重点研发计划项目(2023YFD) （2023YFD）
湖南湘南'供粤港澳'蔬菜优势特色产业集群项目(湘农联[2023]64号) （湘农联[2023]64号）
湖南省重点研发计划项目(2023NK2010、2024QY2010) （2023NK2010、2024QY2010）
湖南省现代农业(蔬菜)产业技术体系项目(HARS-04) （蔬菜）
湖南省教育厅项目(24C0100) （24C0100）
