温水灌溉对低温胁迫下不结球白菜生理指标的影响  

Effects of warm water treatment on physiological indexes of pakchoi under cold stress

作　　者：俞静 李彭丽 翁金阳 黄金阳 牛庆良[1] YU Jing;LI Pengli;WENG Jinyang;HUANG Jinyang;NIU Qingliang(School of Agriculture and Biology,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学农业与生物学院,上海200240

出　　处：《上海农业学报》2024年第1期34-39,共6页Acta Agriculturae Shanghai

基　　金：上海市科技兴农项目[沪农科攻字(2019)第2-2号]。

摘　　要：为研究温水灌溉对低温胁迫下不结球白菜生理应激响应的影响,以不结球白菜抗热品种‘新夏青’为试验材料,在低温胁迫条件下进行温水浇灌处理。结果表明:与对照相比,35℃温水灌溉处理不结球白菜的生物量,包括干鲜重、茎粗、叶面积显著提高,可溶性糖和可溶性蛋白含量分别增加30.1%和46.0%,叶绿素a和叶绿素b含量提高32.5%和13.2%,SOD、POD、CAT活性显著提升,相对电导率、丙二醛和过氧化氢含量显著降低,光合速率和蒸腾速率分别提高47.3%和61.6%,光系统I和II的实际光合效率分别提高42.3%和60.9%。该研究可为未来设施园艺作物对抗冷害相关研究提供新思路。In order to study the physiological response of pakchoi under warm water treatment to cold stress,the heat-resistant variety of pakchoi‘Xinxiaqing’was used as the experimental material,and treated with warm water irrigation under cold stress.The effects of warm water irrigation on the biomass,osmotic regulators,antioxidant enzymes,and photosynthetic electronic transport of pakchoi under cold stress were studied.The results showed that the biomass of pakchoi,including dry and fresh weight,stem diameter and leaf area increased effectively under 35℃water irrigation;soluble sugar and soluble protein increased by 30.1%and 46.0%,respectively;the content of chlorophyll a and chlorophyll b increased by 32.5%and 13.2%;and the activity of SOD,POD,CAT was also significantly improved;the relative conductivity,the content of malondialdehyde and hydrogen peroxide were significantly decreased;the photosynthetic rate and transpiration rate increased by 47.3%and 61.6%,respectively;the actual photosynthetic efficiency of photosystem I and II of pakchoi increased by 42.3%and 60.9%,respectively.This study provides new ideas for future cold tolerance breeding on horticultural crops.

关 键 词：不结球白菜 温水处理 低温胁迫 光合机制 生理应激响应 

分 类 号：S634.3[农业科学—蔬菜学]