农业土壤力学及生态环境影响效应的研究展望  

Molecular Mechanism of Plant Drought Tolerance

作　　者：李小昱[1] 

机构地区：[1]西北农业大学机械与电子工程学院

出　　处：《西北农业大学学报》1999年第4期109-112,共4页Journal of Northwest Sci-Tech University of Agriculture and Forestry（Natural Science Edition)

摘　　要：论述了农业土壤力学研究的意义，介绍了国内外该领域的研究进展，并提出从生态学的角度研究农业土壤力学的观点，即将农业土壤力学特性与各种动力学过程及整个自然环境联系起来，这有利于农业土壤资源的合理利用与生态环境的保护。而采用现代化测试方法的农业土壤力学研究将有利于精确农业的发展，促进农业生产的可持续发展。Plant could adapt water stress through osmotic adjustment,desiccation protection and metabolic changes.Under slight stress condition,osmotic adjustment plays the role.With more severe stress desiccation occurs,Accumulation of desiccation protectants such as LEA (Late Embryogenesis Abundant) protein and sugars avoids damage of biomacromolecules,especially membrane system in some extent.Long time mild water stress may change plant metabolic pathways,which is useful for plant to adapt stress conditions.This paper reviews the proceedings of gene expression and regulation in relation to osmotic adjustment,desiccation protection and metabolic changes.Proceedings of genetic transformation confering drought tolerance is also reviewed.

关 键 词：土壤 农业土壤力学 生态环境 

分 类 号：S152.9[农业科学—土壤学]