植物DIR家族成员结构特征及生物学功能研究进展

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Research Progress on Structural Characteristics and Biological Functions of DIR Family Members in Plants

ZHANG Jinpeng，YANG Mengping，SUN Xuhong，LI Zhixin，LOU Shubao， XING Jinyue，WANG Huaipeng，SONG Jiling （KeshanBranchofHeilongjiangAcademyofAgriculturalSciences/Test-TubePlantletBankofNationalPotatoGermplasm Resources（Keshan）/National Potato ImprovementCenter/KeyLaboratory ofPotato Biology and Genetic Breeding， Ministry ofAgriculture and Rural Affairs，Qiqihar 161000）

Abstract：Throughout their growth and development，plants are exposed to numerous adverse environmental conditions.In response to these stresses，plants synthesize secondary metabolites such as lignin and lignans， which contribute tocell wall reinforcement and defense.Dirigent （（DIR）proteins were characterizedasa family of auxiliary proteins inplants，typically containing aconserved dirigent domain.They have been implicated in lignin polymerization and lignan biosynthesis by mediating the stereo-andregioselectivity of oxidative coupling reactions.In recent years，DIR family in various plant species have been extensively studied for their roles in plant growth，development，andresponses tobioticandabiotic stresses.This reviewcomprehensively focuses on recent advances in the structural characteristics，subfamily classification，and biological functions of the DIR family members inplants.It particularly emphasizes elucidating the mechanisms by which DIR genes respond to stresses such as drought，low temperature，and pathogen infection.The information synthesized in this review provides the theoretical basis for elucidating how DIR genesregulate plant growth，development，stress tolerance，and quality formation.It will ultimately guide the development of elitegermplasm characterized by high yield，superior quality，and broad-spectrum stress tolerance.

Keywords：DIR;lignin;lignan;biotic and abiotic stresses

植物在生长发育过程中遭受多样复杂的环境因素影响，为了应对这些因素植物会产生一系列的次生代谢物，如类胡萝卜素、花青素、木质素、木脂素、植保素、生物碱及植物激素等[1]。（剩余29857字）