2，4-表油菜素内酯(EBR)是油菜素内酯最活跃的形式之一，能够刺激不同的植物代谢过程。为探究辣椒干旱胁迫条件下花期施用EBR对其抗旱性和果实品质的影响，以平椒7号为试材，采用盆栽控水法研究了在不同干旱胁迫下喷施0.4 mg/L EBR对辣椒叶片叶绿素、抗氧化参数、渗透调节参数和果实品质的影响。结果表明，干旱胁迫条件下，花期喷施0.4 mg/L的EBR能提高辣椒叶片过氧化物酶(POD)、超氧化物歧化酶(SOD)、过氧化氢酶(CAT)活性及叶绿素和脯氨酸(Pro)含量，降低丙二醛(MDA)的积累，辣椒果实中可溶性糖、可溶性蛋白和Vc含量也有所增加，说明外源EBR可缓解干旱胁迫对辣椒生长的抑制，提高品质。

2,4-Epiandrosterone(EBR) is one of the most active forms of brassinolide, which can stimulate different plant metabolic processes. To investigate the effects of applying EBR during the flowering period on the drought resistance and fruit quality of peppers under drought stress conditions, with Pingjiao 7 as test material, the pot experiment was conducted to investigate the effects of spraying 0.4 mg/L EBR on chlorophyll content, antioxidant parameters, osmoregulation parameters and fruit quality of peppers under different levels of drought stress. The results showed that spraying 0.4 mg/L EBR at pepper flowering stage could significantly increase the contents of chlorophyll, POD, SOD, Pro, and CAT activity in pepper leaves, while it could significantly reduce the accumulation of MDA. The soluble sugar content, soluble protein content and vitamin C content of pepper were also significantly increased compared with that in the control. These results indicated that exogenous EBR could relieve the inhibition of drought stress on the growth of peppers and improve their quality as well.

S641.3

甘肃省青年基金项目(21JR7RL911)。