...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Experimental Botany >Microbial amelioration of crop salinity stress
【24h】

Microbial amelioration of crop salinity stress

机译：微生物改良作物盐分胁迫

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The use of soil and irrigation water with a high content of soluble salts is a major limiting factor for crop productivity in the semi-arid areas of the world. While important physiological insights about the mechanisms of salt tolerance in plants have been gained, the transfer of such knowledge into crop improvement has been limited. The identification and exploitation of soil microorganisms (especially rhizosphere bacteria and mycorrhizal fungi) that interact with plants by alleviating stress opens new alternatives for a pyramiding strategy against salinity, as well as new approaches to discover new mechanisms involved in stress tolerance. Although these mechanisms are not always well understood, beneficial physiological effects include improved nutrient and water uptake, growth promotion, and alteration of plant hormonal status and metabolism. This review aims to evaluate the beneficial effects of soil biota on the plant response to saline stress, with special reference to phytohormonal signalling mechanisms that interact with key physiological processes to improve plant tolerance to the osmotic and toxic components of salinity. Improved plant nutrition is a quite general beneficial effect and may contribute to the maintenance of homeostasis of toxic ions under saline stress. Furthermore, alteration of crop hormonal status to decrease evolution of the growth-retarding and senescence-inducing hormone ethylene (or its precursor 1-aminocyclopropane-1-carboxylic acid), or to maintain source-sink relations, photosynthesis, and biomass production and allocation (by altering indole-3-acetic acid and cytokinin biosynthesis) seem to be promising target processes for soil biota-improved crop salt tolerance.
机译：在世界半干旱地区，使用可溶性盐含量高的土壤和灌溉水是作物生产力的主要限制因素。虽然已经获得了有关植物耐盐性机制的重要生理学见识，但将此类知识转移到作物改良中的方法受到限制。通过缓解胁迫与植物相互作用的土壤微生物（尤其是根际细菌和菌根真菌）的识别和开发为抗盐分金字塔策略提供了新的选择，并为发现新的与胁迫耐受性相关的机制提供了新方法。尽管并不总是很好地理解这些机制，但是有益的生理作用包括改善的养分和水分吸收，促进生长以及改变植物激素状态和代谢。这篇综述旨在评估土壤生物区系对植物对盐胁迫的响应的有益影响，并特别提及与主要生理过程相互作用的植物激素信号传导机制，以提高植物对盐分的渗透性和毒性成分的耐受性。改善植物营养是一个相当普遍的有益效果，可能有助于维持盐分胁迫下有毒离子的体内平衡。此外，改变作物激素状态以减少发育迟缓和诱导衰老的激素乙烯（或其前体1-氨基环丙烷-1-羧酸）的进化，或维持源库关系，光合作用以及生物量的生产和分配（通过改变吲哚-3-乙酸和细胞分裂素的生物合成）似乎是土壤生物群改善作物耐盐性的有希望的目标过程。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号