盐胁迫对燕麦生长及生理指标的影响  

Effects of Salt Stress on Growth and Physiological Indexes of Oat

作　　者：李峰 高宏云 张翀 张宝英 马建富 郭娜 白苇 方爱国 杨志敏 李源[4] Li Feng;Gao Hongyun;Zhang Chong;Zhang Baoying;Ma Jianfu;Guo Na;Bai Wei;Fang Aiguo;Yang Zhimin;Li Yuan(Zhangjiakou Academy of Agricultural Sciences,Zhangjiakou 075000,Hebei,China;Shihezi Vocational and Technical College of Xinjiang,Shihezi 832003,Xinjiang,China;College of Animal Science and Technology,Southwest University,Chongqing 400715,China;Institute of Dry Farming,Hebei Academy of Agriculture and Forestry Sciences,Hengshui 053000,Hebei,China)

机构地区：[1]张家口市农业科学院,河北张家口075000 [2]新疆石河子职业技术学院,新疆石河子832003 [3]西南大学动物科学技术学院,重庆400715 [4]河北省农林科学院旱作农业研究所,河北衡水053000

出　　处：《作物杂志》2024年第6期140-146,共7页Crops

基　　金：河北省重点研发计划项目(19226424D);河北省现代农业产业技术体系草业创新团队建设专项资金项目(HBCT2018160201);张家口市科技支持计划项目(1511063C);张家口市重点研发计划项目(1911016C-2)。

摘　　要：采用耐盐燕麦品种张燕7号(A)和盐敏感品种坝莜18号(B)为试验材料,研究不同盐胁迫处理(对照0.0%、0.2%、0.4%和0.6%)对燕麦生长、光合生理特性及籽粒酚类物质含量的影响。结果表明,随着盐浓度增加,品种A和B出苗率、株高、单株干重、单株鲜重和叶片含水量都显著降低;在0.2%盐浓度下,2个品种的净光合速率、胞间CO_(2)浓度、超氧化物歧化酶和过氧化物酶活性都显著高于对照;在0.4%盐浓度处理下相对叶绿素含量和蒸腾速率显著高于对照。在0.6%浓度盐处理下气孔限制值达到最高峰,品种A较B高。盐浓度分别在0.6%和0.4%时,品种A和B籽粒总酚和总黄酮含量达到最高水平。盐浓度0.6%时,2个品种籽粒的抗氧化能力达到最高。综上所述,盐胁迫会影响植株的生长,降低光合指标,提高燕麦的酶活性、酚类物质及抗氧化能力,且盐胁迫对盐敏感品种坝莜18号的抑制作用大于耐盐品种张燕7号。Salt-tolerant oat variety Zhangyan 7(A)and salt-sensitive variety Bayou 18(B)were used as experimental materials to study the effects of different salt stress treatments(control 0.0%,0.2%,0.4%and 0.6%)on the growth,photosynthetic physiological characteristics and the contents of phenolic substances in oat grains.The results showed that,with the increase of salt concentration,the emergence rate,plant height,dry weight per plant,fresh weight per plant and leaf water content of A and B decreased significantly.Under 0.2%salt concentration,the Pn,Ci,SOD and POD activities of the two varieties were significantly higher than those of the control.The SPAD and Tr of A and B were higher than control at 0.4%salt concentration.Under the treatment of 0.6%concentration salt,Ls reached the highest peak,and variety A was higher than B.When the salt concentration were 0.6%and 0.4%,the contents of total phenol and total flavonoid in seeds of varieties A and B reached the highest level,respectively.When the salt concentration was 0.6%,the antioxidant capacity of two varieties reached the highest.In summary,salt stress can affect plant growth,reduce photosynthetic indexes,and improve enzyme activity,phenolic substances and antioxidant capacity of oat.Moreover,salt stress had a greater inhibitory effect on salt-sensitive Bayou 18 than salt-tolerant variety Zhangyan 7.

关 键 词：燕麦 盐胁迫 光合作用 抗氧化剂 酚类 生理特性 

分 类 号：S512.6[农业科学—作物学]