From Cell Division to Stress Tolerance:The Versatile Roles of Cytokinins in Plants  

作　　者：Antonio Rodrigues da Cunha Neto Alexandra dos Santos Ambrósio Arlinda de Jesus Rodrigues Resende Breno Régis Santos Michele Carla Nadal 

机构地区：[1]Instituto de Ciencias da Natureza,Universidade Federal de Alfenas,Alfenas,37130-001,Brazil [2]Escuela de Ciencias Agricolas y Veterinarias,Universidad Vina del Mar,Vina del Mar,2572007,Chile

出　　处：《Phyton-International Journal of Experimental Botany》2025年第3期539-560,共22页国际实验植物学杂志(英文)

基　　金：funded by Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior(CAPES)[Funding Code 001],CAPES/BRASIL PDPG-POSDOC No.2930/2022.Conselho Nacional de Desenvolvimento Cientifico e Tecnologico(CNPq);Fundacao de Amparo a Pesquisa do Estado de Minas Gerais(FAPEMIG)[BPD-00571-22].

摘　　要：Cytokinins are plant hormones that are essential for plant growth and development and are involved in a variety of processes.They are synthesized by the modification of adenine with an isoprenoid chain,resulting in cytokinins such as isopentenyladenine and zeatin.The levels of these hormones are regulated by conjugation,degradation and oxidation processes that modulate their activity.Cytokinins are perceived by cells through specific receptors that,when activated,trigger signaling cascades responsible for regulating the expression of genes critical for development.In addition,cytokinins interact with other hormones,such as auxins,to coordinate plant growth and architecture.They are transported by the xylem and phloem,allowing them to be distributed to different parts of the plant and to regulate processes such as cell division,morphogenesis and inhibition of leaf senescence,thereby prolonging the vegetative phase.Cytokinins also play a role in plant responses to biotic and abiotic stresses.They influence the expression of defense genes against pathogens and pests and adjust plant metabolism and growth in response to adverse conditions such as drought and salinity.Cytokinins interact in an integrated manner with other stress hormones,such as abscisic acid and ethylene,to coordinate plant responses to environmental challenges.In agriculture,the manipulation of cytokinins,whether by external application or genetic modification,shows great potential for increasing crop yields and improving plant resistance to stress.Advances in molecular biology and gene editing offer new opportunities to precisely modify these functions.This review elucidates recent research on cytokinins,covering their mechanisms of action,interactions with other hormones,and applications in agriculture.

关 键 词：Regulatory and transport mechanisms cell proliferation leaf senescence biotic stresses abiotic stresses hormonal metabolismo biotechnological applications genetic crop improvement 

分 类 号：R73[医药卫生—肿瘤]