Research Progress of Drought-resistant Genes in Forest Trees
Drought is an important environmental factor that seriously limits the production of agriculture and forestry all over the world.And it is resulted in a large number of losses in agriculture and forestry.In this paper,the mechanism of drought resistance in plants and the research status of drought resistance genes in trees were reviewed.By discussing and analyzing the prospect and existing problems of drought tolerance research of forest trees,it is proposed to make full use of molecular biology technology to mine drought-related genes.At present,the main drought-resistant genes are transcription factors.After cloning from forest trees,genetic transformation was carried out in poplar,Arabidopsis thaliana or other forest trees,and the function of drought-resistant genes was verified to clarify the molecular mechanism of drought resistance in forest trees.In addition,in the breeding application,we cloned drought-resistant genes from forest trees,created new germplasm with strong drought resistance through transgenic and gene editing,and then carried out pilot tests and environmental release to cultivate new varieties with strong drought resistance,so as to increase their biomass under drought conditions and improve their resistance and adaptability under adverse circumstances.Finally,new varieties of forests with strong drought-resistant ability are cultivated and improved by means of molecular genetics and breeding.Cultivating new varieties of drought-resistant forest trees is an effective means to increase their biomass and improve their quality of life under drought conditions.Obtaining drought-resistant forest germplasm through genetic breeding biotechnology could further improve their drought tolerance,provide more new forest materials for arid and semi-arid areas in China,promote the sustainable and benign development of forestry,and provide new germplasm for building beautiful scenes.
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