Abiotic Stress-Induced Leaf Senescence: Regulatory Mechanisms and Application

• Published in: International journal of molecular sciences Vol. 24; no. 15; p. 11996
• Main Authors: Tan, Shuya, Sha, Yueqi, Sun, Liwei, Li, Zhonghai
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 26-07-2023; MDPI
• Subjects: Abiotic stress; Agricultural production; Arabidopsis; Chlorophyll; crop; Crops, Agricultural - genetics; Crops, Agricultural - growth & development; DNA binding proteins; Drought; Droughts; Enzymes; Fruits; Gene expression; Gene Expression Regulation, Plant; Genetic research; Genetic transcription; leaf senescence; Leaves; Nitrogen; Photosynthesis; Plant Growth Regulators - metabolism; Plant Leaves - growth & development; Plant Leaves - metabolism; Plant Leaves - physiology; Plant Senescence; Proteins; Review; Salinity; Senescence; stress tolerance; Stress, Physiological; transcription factor; Transcription factors; Transgenic plants; transcription factor; stress tolerance; Arabidopsis; crop; abiotic stress; leaf senescence
• ISSN: 1422-0067; 1661-6596; 1422-0067
• DOI: 10.3390/ijms241511996

Leaf senescence is a natural phenomenon that occurs during the aging process of plants and is influenced by various internal and external factors. These factors encompass plant hormones, as well as environmental pressures such as inadequate nutrients, drought, darkness, high salinity, and extreme temperatures. Abiotic stresses accelerate leaf senescence, resulting in reduced photosynthetic efficiency, yield, and quality. Gaining a comprehensive understanding of the molecular mechanisms underlying leaf senescence in response to abiotic stresses is imperative to enhance the resilience and productivity of crops in unfavorable environments. In recent years, substantial advancements have been made in the study of leaf senescence, particularly regarding the identification of pivotal genes and transcription factors involved in this process. Nevertheless, challenges remain, including the necessity for further exploration of the intricate regulatory network governing leaf senescence and the development of effective strategies for manipulating genes in crops. This manuscript provides an overview of the molecular mechanisms that trigger leaf senescence under abiotic stresses, along with strategies to enhance stress tolerance and improve crop yield and quality by delaying leaf senescence. Furthermore, this review also highlighted the challenges associated with leaf senescence research and proposes potential solutions.