Enigmas of senescence: a reappraisal on the hormonal crosstalk and the molecular mechanisms

IF 2.2 4区生物学 Q2 PLANT SCIENCES Theoretical and Experimental Plant Physiology Pub Date : 2024-02-26 DOI:10.1007/s40626-024-00308-5

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Abstract

Due to the already strained and severely challenged agricultural ecosystems of the modern world, predicted changes in life cycle of plants, including leaf senescence are receiving significant attention from stakeholders. The onset, progression and terminal phases of leaf senescence are greatly influenced by plant hormones. The senescence of leaves is accelerated by ethylene, jasmonic acid (JA), salicylic acid (SA), abscisic acid (ABA), brassinosteroids and strigolactones (SLs), whereas it is postponed by cytokinins (CKs), gibberellic acid (GA) and auxins. The crosstalk and signal transduction pathways between these growth regulators have been found to regulate leaf senescence by orchestrating various developmental and environmental factors. Premature leaf senescence lessens the plant’s nutritional capacity and shortens the vegetative production schedule, prompting an early transition from the vegetative to the reproductive stage and diminishing crop potential. As a result, a complete understanding of leaf senescence and finding novel ways to delay it is crucial for agricultural productivity. The ability to manipulate leaf senescence for agricultural enhancement has been made possible by significant advances in physiological and molecular awareness of leaf senescence. Although studies pertaining to leaf senescence have been given steadily more attention, there are still numerous challenges that need to be resolved. In this perspective, this review focuses on current advances in understanding the leaf senescence by molecular and genetic analyses with an emphasis on hormonal regulation of leaf senescence. We also hypothesize future research to better comprehend leaf senescence by employing various current technologies.

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衰老之谜：重新评估荷尔蒙串联和分子机制

摘要由于现代世界的农业生态系统已经十分紧张并受到严重挑战，包括叶片衰老在内的植物生命周期的预测变化正受到利益相关者的极大关注。叶片衰老的开始、进行和结束阶段在很大程度上受植物激素的影响。乙烯、茉莉酸 (JA)、水杨酸 (SA)、脱落酸 (ABA)、铜固醇和糙叶内酯 (SLs) 会加速叶片的衰老，而细胞分裂素 (CKs)、赤霉素 (GA) 和辅酶则会延缓叶片的衰老。研究发现，这些生长调节因子之间的相互影响和信号转导途径可通过协调各种发育和环境因素来调节叶片衰老。叶片过早衰老会降低植物的营养能力，缩短无性生产期，促使植物提前从无性阶段过渡到生殖阶段，降低作物的生长潜力。因此，全面了解叶片衰老并找到延缓衰老的新方法对农业生产至关重要。由于对叶片衰老的生理和分子认识取得了重大进展，操纵叶片衰老以提高农业产量的能力已成为可能。尽管有关叶片衰老的研究越来越受到重视，但仍有许多挑战需要解决。从这一角度出发，本综述侧重于通过分子和遗传分析了解叶片衰老的当前进展，重点是叶片衰老的激素调控。我们还对未来的研究提出了假设，希望利用当前的各种技术更好地理解叶片衰老。

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来源期刊

Theoretical and Experimental Plant Physiology PLANT SCIENCES-

CiteScore

4.20

自引率

7.70%

发文量

期刊介绍： The journal does not publish articles in taxonomy, anatomy, systematics and ecology unless they have a physiological approach related to the following sections: Biochemical Processes: primary and secondary metabolism, and biochemistry; Photobiology and Photosynthesis Processes; Cell Biology; Genes and Development; Plant Molecular Biology; Signaling and Response; Plant Nutrition; Growth and Differentiation: seed physiology, hormonal physiology and photomorphogenesis; Post-Harvest Physiology; Ecophysiology/Crop Physiology and Stress Physiology; Applied Plant Ecology; Plant-Microbe and Plant-Insect Interactions; Instrumentation in Plant Physiology; Education in Plant Physiology.