School of Life Sciences, Jawaharlal Nehru University, New Delhi, India.
Physiol Plant. 2023 Jul-Aug;175(4):e13968. doi: 10.1111/ppl.13968.
Serotonin is a well-studied pineal hormone that functions as a neurotransmitter in mammals and is found in varying amounts in diverse plant species. By modulating gene and phytohormonal crosstalk, serotonin has a significant role in plant growth and stress response, including root, shoot, flowering, morphogenesis, and adaptability responses to numerous environmental signals. Despite its prevalence and importance in plant growth and development, its molecular action, regulation and signalling processes remain unknown. Here, we highlight the current knowledge of the role of serotonin-mediated regulation of plant growth and stress response. We focus on serotonin and its regulatory connections with phytohormonal crosstalk and address their possible functions in coordinating diverse phytohormonal responses during distinct developmental phases, correlating with melatonin. Additionally, we have also discussed the possible role of microRNAs (miRNAs) in the regulation of serotonin biosynthesis. In summary, serotonin may act as a node molecule to coordinate the balance between plant growth and stress response, which may shed light on finding its key regulatory pathways for uncovering its mysterious molecular network.
血清素是一种研究充分的松果腺激素，在哺乳动物中作为神经递质发挥作用，并且在不同的植物物种中以不同的量存在。通过调节基因和植物激素的相互作用，血清素在植物生长和应激反应中发挥着重要作用，包括根、茎、花、形态发生和对许多环境信号的适应性反应。尽管它在植物生长和发育中普遍存在且重要，但它的分子作用、调节和信号转导过程仍然未知。在这里，我们强调了血清素介导的植物生长和应激反应调节的作用。我们重点关注血清素及其与植物激素相互作用的调节关系，并探讨它们在协调不同发育阶段不同植物激素反应中的可能功能，与褪黑素相关联。此外，我们还讨论了 microRNAs（miRNAs）在血清素生物合成调节中的可能作用。总之，血清素可能作为一个节点分子来协调植物生长和应激反应之间的平衡，这可能有助于找到其关键调节途径，揭示其神秘的分子网络。
