2,4-D attenuates salinity-induced toxicity by mediating anatomical changes, antioxidant capacity and cation transporters in the roots of rice cultivars.
2,4-D attenuates salinity-induced toxicity by mediating anatomical changes, antioxidant capacity and cation transporters in the roots of rice cultivars.
复制标题
DOI：
10.1038/s41598-017-09708-x
复制
发表时间：
2017-09-05
影响因子：
4.6
通讯作者：
Zhou W
中科院分区：
文献类型：
--
作者：
Islam F;Farooq MA;Gill RA;Wang J;Yang C;Ali B;Wang GX;Zhou W
生长调节剂除草剂被广泛应用于稻田杂草的控制，但其在赋予作物对环境胁迫的耐受性方面的作用仍然是未知的。以耐盐水稻品种XS 134和盐敏感水稻品种ZJ 88为材料，研究了不同盐胁迫下2，4-D对水稻生长、氧化损伤、抗氧化防御、阳离子转运蛋白基因表达和根系解剖结构的影响。盐胁迫和2，4-D施用的单独处理诱导氧化损伤，表现为与耐受品种相比，敏感品种的根生长下降，ROS产生增加，膜损伤和Na+积累增加。相反，2，4-D和盐胁迫联合处理通过调节木质素和胼胝质的沉积、阿萨、GSH的氧化还原状态以及抗氧化防御系统相关酶的活性，显著缓解了水稻根系的生长抑制和氧化胁迫。9个阳离子转运蛋白基因的表达分析表明，盐胁迫下敏感和抗性品种的根中改变和差异的基因表达。总之，这些结果表明，2，4-D差异调节Na+和K+水平，ROS的产生，抗氧化防御，解剖结构的变化和阳离子转运蛋白/基因在水稻品种的根。
Growth regulator herbicides are widely used in paddy fields to control weeds, however their role in conferring environmental stress tolerance in the crop plants are still elusive. In this study, the effects of recommended dose of 2,4-dichlorophenoxyacetic acid (2,4-D) on growth, oxidative damage, antioxidant defense, regulation of cation transporter genes and anatomical changes in the roots of rice cultivars XS 134 (salt resistant) and ZJ 88 (salt sensitive) were investigated under different levels of saline stress. Individual treatments of saline stress and 2,4-D application induced oxidative damage as evidenced by decreased root growth, enhanced ROS production, more membrane damage and Na+ accumulation in sensitive cultivar compared to the tolerant cultivar. Conversely, combined treatments of 2,4-D and saline stress significantly alleviated the growth inhibition and oxidative stress in roots of rice cultivars by modulating lignin and callose deposition, redox states of AsA, GSH, and related enzyme activities involved in the antioxidant defense system. The expression analysis of nine cation transporter genes showed altered and differential gene expression in salt-stressed roots of sensitive and resistant cultivars. Together, these results suggest that 2,4-D differentially regulates the Na+ and K+ levels, ROS production, antioxidant defense, anatomical changes and cation transporters/genes in roots of rice cultivars.
登录
查看更多内容
影响因子：
4.3
作者：
Almeida, Pedro;de Boer, Gert-Jan;de Boer, Albertus H.
通讯作者：
de Boer, Albertus H.
DOI：
10.3146/ps16-15.1
发表时间：
2017-01-01
期刊：
Peanut Science
影响因子：
--
作者：
Blanchett, B. H.;Grey, T. L.;Webster, T. M.
通讯作者：
Webster, T. M.
DOI：
10.21273/jashs.136.3.165
发表时间：
2011-05-01
影响因子：
1.9
作者：
Bondada, Bhaskar R.
通讯作者：
Bondada, Bhaskar R.
影响因子：
7.4
作者：
Capel, J;Jarillo, JA;MartinezZapater, JM
通讯作者：
MartinezZapater, JM
影响因子：
6.2
作者：
Ardie, Sintho Wahyuning;Liu, Shenkui;Takano, Tetsuo
通讯作者：
Takano, Tetsuo