Responds Of Germination And Physiologic Of The Salt Stress To The Primary Plants In The Lower Reaches Of The Tarim River

Tarim Basin region, particularly in the downstream area has always been concerned because of its'vulnerable areas of ecological environment. The local ecological environment is worsening by the reasons of local special geographical location and climatic conditions, economic and social development, and human activities of production and life of high intensity. Recently, serious damage to the ecosystem of River gradually began to be taken seriously. Since 2000, the country's key projects in the Tarim eco-management plan was introduced 10 years until 2010 to achieve the 11 ecological water transport, the Tarim River Basin ecological environment restoration and protection of vegetation plays an important role.However, additional water is only one aspect. Because of time differences and water regional differences, led to the restoration of the monitoring sections of the effects are inconsistent, the ecological environment in some areas still continue to deteriorate.Therefore, how to plant water recovery and protection of ecological environment is the essence of the full use of the problem.According to the survey, the upper reaches of the Tarim River runoff area is gathering, and also became a gathering place for the water contains salt. Soil salts contained significantly higher plant growth and hinders the absorption of water, so water to supplement the River in the extreme lack of water downstream, while the local environment of saline and local Salt tolerant vegetation is also the very ability to explore and study with significance.The lower reache of Tarim River is the main monitoring sections of the salt resistance of plants and experimental analysis of the survey. In the field survey and sample the vegetation species, composition, number of statistics, based on the choice of 7 main downstream plants, collecting seeds, and germination coercion indoor simulation tests. In the germination process, the life form the basis for the classification of various plants, germination rate records; on the physiological indices, including malondialdehyde (MDA), free proline (Pro) and superoxide dismutase (SOD) weremeasurement, recording, post-experimental data for statistical analysis and variance analysis. Germination and physiological indices for the analysis of comprehensive comparison, reached the following conclusions:(1)The lower reaches of the main perennial herb salt tolerance relative strength of the salt, semi-bush plants Apocynum salt resistance is relatively weak. Salt thorn bush growing bell cap in 0.4mol / L or so.(2)In the wild desert of 7 under salt stress malondialdehyde (MDA) content, free proline (Pro) content and superoxide dismutase containing (SOD) activity of the anomaly difference analysis, change law analysis and the ANOVA reached a preliminary discussion of the three enzymes in plants at different stress levels and between the more significant difference (P <0.01), different plants under salt stress changes in each index is significantly differences. Reflect the impact of the saline environment of wild desert plant survival and growth of the state of the important factors.(3)From the change of three enzymes of the plant's process, the plant is not obvious variation of an index or a change in concentration is slightly inconsistent with the overall changes, but does not affect the three enzymes comprehensive analysis of the results, with the germination rate of the same conclusions.That it reflects a variety of integrated indicators of salt stress on the actual impact of plants.These conclusions drawn from this study in order to provide reference and basis for restore the vegetation and ecological environment protection.