第3对真叶期甜菜幼苗对NaCl胁迫的抗逆性研究  

Study on the resistance of NaCl stress to Beta vulgaris seedlings at the third leaf stage

作　　者：庞文强 张伟华[1] 黄春燕[2] 武毅昶 魏淑贞[1] 李虹俞 PANG Wenqiang;ZHANG Weihua;HUANG Chunyan;WU Yichang;WEI Shuzhen;LI Hongyu(Grassland and Resources College, Inner Mongolia Agricultural University, Hohhot 010012,China;Special Crop Research Institute,Inner Mongolia Academy of Agriculture and Animal Husbandry Sciences, Hohhot 010031,China)

机构地区：[1]内蒙古农业大学草原与资源学院,内蒙古呼和浩特010012 [2]内蒙古农牧业科学院特色作物研究所,内蒙古呼和浩特010031

出　　处：《北方农业学报》2018年第2期16-20,共5页Journal of Northern Agriculture

基　　金：国家现代农业甜菜产业技术体系项目(CARS-170209)

摘　　要：为研究甜菜幼苗第3对真叶期对NaCl的耐盐程度,以甜菜品种H003为试验材料进行盆栽实验,试验共设10个浓度处理,每个处理的NaCl质量分别占盆栽土壤质量的0%、0.1%、0.2%…0.9%,对甜菜叶片的生长和生理指标进行测定。结果表明:随着NaCl处理浓度的升高,鲜重、干重和株高均呈先上升后降低趋势,鲜重和干重在0.1%和0.2%处理下显著高于CK,0.3%和0.4%的处理与CK无显著差异,株高也在0.1%和0.2%处理下显著高于CK,在0.3%~0.7%处理下与CK无显著差异。叶绿素和超氧化物歧化酶(SOD)活性和品质指标一样表现出随NaCl浓度的增加先增高后降低的规律。丙二醛(MDA)含量和叶片质膜透性则随NaCl浓度的增加持续升高。第3对真叶期的甜菜在≤0.4%的NaCl胁迫环境下其生长不受抑制,并且0.1%~0.2%的NaCl胁迫可以促进甜菜生长。In order to study the salt tolerance of Beta vulgar seedlings to NaCI salt at the third leaf stage, pot experiments were carried out with sugar beet variety H003 as the experimental material. The experiment consisted of 10 concentrations of NaCl, and the quality of NaCl in each treatment accounted for 0%, 0.1%, 0.2% ... 0.9% of the potted soil, respectively. Indicators were measured. The results showed that the fresh weight, dry weight and plant height of Beta vulgar reached the highest value at 0.2% salt treatment, and the fresh weight and dry weight at 0.5% stress treatment were significantly lower than the control, while the dry weight reached 0.7% stress treatment was significantly lower than the control. Chlorophyll and suporoxido dismutase（SOD）activity and quality indicators showed the same as the increase of NaCl concentration first increased and then decreased. Malondialdohydo （MDA） content and leaf plasma membrane permeability continued to increase with the increase of NaCl concentration. The growth of sugar beet was not inhibited under the soil NaCl stress of 0.4% or loss in the third leaf stage, and 0.1% - 0.2% NaCl soil environment promoted its growth.

关 键 词：超氧化物歧化酶 叶绿素 丙二醛 叶片质膜透性 

分 类 号：S566.3[农业科学—作物学]