
Application of CRISPR/Cas technique in woody plant improvement
HOU Jing, MAO Jinyan, ZHAI Hui, WANG Jie, YIN Tongming
JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2021, Vol. 45 ›› Issue (6) : 24-30.
Application of CRISPR/Cas technique in woody plant improvement
Long breeding periods and scarce germplasm resources have become the main bottlenecks in woody plant improvement. Recently, the CRISPR/Cas system has been developed into a precision site-directed editing technology that has been widely used in the breeding of woody plants such as Populus spp., Malus spp., Citrus spp., Vitis vinifera and Cassava spp.. The yield, quality, biotic- and abiotic-stress resistance, and other traits of woody plants have been significantly improved by genome editing, achieving the fixation of excellent genotypes within a single generation. This approach has accelerated the breeding process of woody plants and improves their breeding efficiency. Here, we summarize the application of CRISPR/Cas technology to woody plants, analyzing existing problems and future development trends. This review aims to provide a useful reference for gene function research and improvement of woody plants.
CRISPR/Cas / genome editing / molecular breeding / woody plants / breed improvement
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WRKY transcription factors are one of the largest families of transcriptional regulators in plants and form an integral part of signaling webs that modulates many plant processes. WKRY transcription factors have a variety of biological functions and play an important role in plant growth,development and senescence,abiotic and biotic stress and so on. At DNA level,WRKY transcription factors can bind to W-box TTGAC(C/T)in the promoter of its target genes and activate or inhibit the expression of downstream genes to regulate their response by self-regulation or cross-regulation. At protein level,WRKY transcription factors can regulate plant growth and development or various stress responses by interacting with a variety of proteins,including MAP kinases,histone deacetylase,resistant R proteins,and a variety of transcription factors. This paper reviews the research progress on the structure,biological function,regulatory mechanism and network of WRKY transcription factors,which will help us to understand their roles in plants more comprehensively.
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