Plants reprogram somatic cells following injury and regenerate new tissues and organs. Upon perception of inductive cues, somatic cells often dedifferentiate, proliferate, and acquire new fates to repair damaged tissues or develop new organs from wound sites. Wound stress activates transcriptional cascades to promote cell fate reprogramming and initiate new developmental programs. Wounding also modulates endogenous hormonal responses by triggering their biosynthesis and/or directional transport. Auxin and cytokinin play pivotal roles in determining cell fates in regenerating tissues and organs. Exogenous application of these plant hormones enhances regenerative responses in vitro by facilitating the activation of specific developmental programs. Many reprogramming regulators are epigenetically silenced during normal development but are activated by wound stress and/or hormonal cues.

中文翻译：

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植物再生的分子机制

植物在损伤后重新编程体细胞并再生新的组织和器官。在感知诱导线索后，体细胞通常会去分化、增殖并获得新的命运以修复受损组织或从伤口部位发育新器官。伤口压力激活转录级联以促进细胞命运重编程并启动新的发育程序。伤口还通过触发其生物合成和/或定向运输来调节内源性激素反应。生长素和细胞分裂素在决定再生组织和器官的细胞命运方面起着关键作用。这些植物激素的外源应用通过促进特定发育程序的激活来增强体外再生反应。