关键词: 低价林, 早期诊断, 生态因子途径, 油松, 辽宁西部

Abstract: Plant cell wall mainly consists of cellulose, hemi-cellulose, pectic substances, lignin, and proteins. It has a number of functions, including maintain cell stability, transport materials, and protect cell against environmental stresses. When the plant life cycle is affected by various environmental signals, cell wall properties will have great change, and cell wall components content and structure will be also changed, which is supposed to be the causes of the changes in cell wall mechanical properties. These changes can be considered as the responses of plants to environmental stress. This paper summarized the research advances in the changes of cell wall polysaccharides and proteins content and structure and related enzyme activities, and the responses and relevant mechanisms of small molecules secreted to cell spaces under abiotic environmental stresses, such as water deficit, low temperature stress, heavy metals stress, and UV-B radiation. In considering of the recent researches at gene, genomic, and proteomics levels, the future research directions in this area were also discussed.

Key words: Low value forest, Early diagnosis, Ecological factor approach, Chinese pine, Western Liaoning Province