四川农业大学学报2025，Vol.43Issue(6)：1424-1431,8.DOI:10.16036/j.issn.1000-2650.202502643
低氮胁迫对4种柑橘砧木生长的影响
Effects of Low Nitrogen Stress on the Growth of Four Citrus Rootstocks
摘要
Abstract
[Objective]The effects of low nitrogen stress on the growth and biochemical characteristics of four citrus rootstocks were clarified,and the low nitrogen tolerance of different citrus rootstocks was com-prehensively evaluated.[Method]The morphological development,photosynthetic indexes,chlorophyll content,antioxidant enzyme activity and osmotic adjustment substances of citrus rootstocks under low ni-trogen and normal treatments were determined by matrix fixation method with four citrus rootstock seed-lings of Ruta Citrange,Citrus junos,Citrus grandis and Citrus limon as materials.[Result]The plant height,stem diameter,aboveground dry weight and root dry weight of the four citrus rootstocks were inhibited un-der low nitrogen stress.Among the rootstocks,the plant height of Citrus junos decreased the least;the stem diameter and aboveground dry weight of Ruta Citrange decreased the least;the root dry weight of Citrus grandis decreased the least,whereas Citrus limon decreased the most.The total root length and root surface area of the four citrus rootstocks increased,whereas the root volume and average root diameter de-creased.Under conditions of low nitrogen stress,the reduction in chlorophyll a content across the four rootstock varieties ranged from 0.41%to 3.59%,while chlorophyll b decreased by 37.50%to 49.26%.The net photosynthetic rate(Pn),stomatal conductance(Gs)and Fv/Fm of the four rootstocks decreased,and the activities of antioxidant enzymes SOD,POD and CAT increased.Soluble protein content de-creased,while soluble sugar content increased.[Conclusion]Based on the comprehensive indexes,and using the membership function and entropy method,the low nitrogen tolerance ability of four citrus root-stocks was determined to be in the order of Citrus grandis>Ruta Citrange>Citrus limon>Citrus junos.关键词
柑橘砧木/熵值法/低氮胁迫/生理响应Key words
Citrus rootstock/entropy method/low nitrogen stress/physiological responses分类
农业科技引用本文复制引用
李嘉昊,艾靖岚,李云杰,黄泽浩,周馨雅,黄子怡,夏文静,杨昳玥,廖玲..低氮胁迫对4种柑橘砧木生长的影响[J].四川农业大学学报,2025,43(6):1424-1431,8.基金项目
四川省自然科学基金(26ZRMS1435). （26ZRMS1435）
