油菜和小麦响应盐碱胁迫的生理特性比较  

Comparison of physiological characteristics of salt and alkali tolerance between rapeseed and wheat

作　　者：王佳婕 王正楠 BATOOL Maria 王旺年 文静[1] 任长忠 何峰[1,3] 武优悠 徐正华[1] 王晶 蒯婕[1] 汪波 周广生 傅廷栋[1,2] WANG Jia-Jie;WANG Zheng-Nan;BATOOL Maria;WANG Wang-Nian;WEN Jing;REN Chang-Zhong;HE Feng;WU You-You;XU Zheng-Hua;WANG Jing;KUAI Jie;WANG Bo;ZHOU Guang-Sheng;FU Ting-Dong(Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River,the Ministry of Agriculture and Rural Affairs/College of Plant Science and Technology,Huazhong Agricultural University,Wuhan 430070,Hubei,China;Hubei Hongshan Laboratory,Wuhan 430070,Hubei,China;Baicheng Academy of Agricultural Sciences,Baicheng 137099,Jilin,China;Yulin Academy of Agricultural Sciences/Yulin Branch of Guangxi Academy of Agricultural Sciences,Yulin 537000,Guangxi,China;Nantong Institute of Technology,Nantong 226001,Jiangsu,China)

机构地区：[1]农业农村部长江中游作物生理生态与耕作重点实验室/华中农业大学植物科学技术学院,湖北武汉430070 [2]湖北洪山实验室,湖北武汉430070 [3]白城市农业科学院,吉林白城137099 [4]玉林市农业科学院/广西农业科学院玉林分院,广西玉林537000 [5]南通理工学院,江苏南通226001

出　　处：《作物学报》2025年第5期1215-1229,共15页Acta Agronomica Sinica

基　　金：国家重点研发计划项目(2022YFD1500503);湖北洪山实验室研究基金项目(2021HSZD004)资助。

摘　　要：利用能产生经济效益的作物改良盐碱地是扩充我国后备耕地资源的重要手段。明确油菜和小麦响应盐碱胁迫的生理机制,将为挖掘油菜、小麦在盐碱地种植以用作饲料及改良利用盐碱地中的潜力提供依据。本研究将取自吉林白城的盐碱土与武汉常规土壤配制为盐浓度分别为0.2%、0.4%的盐碱土,以武汉常规土壤作对照(CK)进行盆栽试验,分别以耐盐碱能力不同的甘蓝型油菜和小麦为材料,测定生物量、渗透调节、离子平衡、抗氧化酶及H_(2)O_(2)、O_(2)^(-)等指标。研究结果表明,(1)盐碱胁迫下,油菜叶柄中的Na^(+)含量最高,达88.40 mg g^(-1);小麦则是根系中的Na^(+)含量最高,为33.45 mg g^(-1);且油菜各部位中的Na+积累量均显著高于小麦,尤其是叶片中的Na^(+)积累量,高出2~8倍。(2)油菜和小麦在盐碱胁迫下,耐盐碱品种各部位中的K^(+)降幅和K^(+)/Na^(+)比值均高于盐敏感品种, Na^(+)增幅均低于盐敏感品种;油菜苗期根系、蕾薹期叶片中的Na^(+)对K^(+)吸收的抑制效应最大,而小麦各个时期均为根系中的Na^(+)对K^(+)吸收的抑制效应最大。(3)油菜和小麦在盐碱胁迫下,耐盐碱品种植株体内的可溶性糖含量、抗氧化酶活性以及O_(2)^(-)清除能力均高于盐敏感品种,H_(2)O_(2)、O_(2)^(-)均随盐碱胁迫浓度升高而增加,但耐盐碱品种叶片增幅较小;不同的是,耐盐碱油菜品种在苗期抗盐碱生理机制中响应更快,随着生育期的推进,叶片中的可溶性糖含量以及O_(2)^(-)清除能力也会逐渐增加;而耐盐碱小麦品种叶片中的可溶性糖含量和O_(2)^(-)的清除能力均随生育期推进而显著降低。油菜主要通过“储钠”作用将Na+区隔化进叶柄和茎秆中,而小麦主要通过“拒钠”作用减少Na^(+)的吸收,并将Na^(+)更多地积累在根系中;耐盐碱能力强的品种维持钠钾离子平衡能力更强;油菜耐盐碱能力随着生育期的推进逐渐增强,Utilizing the crops which can produce economic benefits to improve the saline-alkali land is an important mean to expand potential resource of farming land in China.Different plants respond differently to saline-alkali stress and have different mechanisms of saline-alkali stress resistance.Identifying the physiological characteristics responding to salt and alkali stress of rapeseed and wheat,can provide theoretical foundations for using rapeseed and wheat as forage and enlarging the application potential of rapeseed and wheat in the improvement and utilization of saline-alkali land.In this study,saline-alkali soils from Jilin province were used for pot experiments;normal soils in Wuhan were used as CK and saline-alkali soils from Jilin with the final salt concentration of 0.2%and 0.4%,respectively,which were prepared in proportion to normal soils from Wuhan.One saline-alkali tolerant and one sensitive variety of rapeseed and wheat were selected,respectively,as research materials.We systematically compared the different salt-alkali tolerance mechanisms of rapeseed and wheat at the germination stage by measuring and analyzing growth indicators,osmotic regulation,ion balance,antioxidant enzymes,H_(2)O_(2),O_(2)^(-) and other indicators.The results showed that:(1)Under saline-alkali stress,in petiole,Na^(+)content was highest among petiole,leaf,stem and root,up to 88.40 mg g^(-1).However,in wheat,Na^(+)concentration in root was the highest,up to 33.45 mg g^(-1).Na^(+)accumulation in all parts of rapeseed was higher than that of wheat,and under the same treatment,especially,the Na^(+)accumulation in leaves was 2-8 times higher than that of wheat.(2)The decrease of K^(+)and the ratio of K^(+)/Na^(+)of salt-tolerant rapeseed and wheat were higher than those of salt-sensitive varieties,while the rate of increase of Na^(+)concentration was lower than that of salt-sensitive varieties.The inhibition effect of Na^(+)depressing K^(+)uptake in the aboveground part of rapeseed is significant higher than those in the root,while

关 键 词：油菜 小麦 盐碱胁迫 Na~+含量 活性氧 

分 类 号：S156.4[农业科学—土壤学]