A hidden link between leaf development and senescence. (November 2018)

• Record Type: Journal Article
• Authors: Koyama, Tomotsugu
• Is Part Of: Plant science. Volume 276(2018)
• Page Start: 105
• Page End: 110
• Publication Date: 2018-11
• Subjects: arf auxin response factor -- chl chlorophyll -- cin cincinnata -- cuc cup-shaped cotyledon -- ein ethylene insensitive -- ebf ein3-binding F box protein -- ER endoplasmic reticulum -- grf growth-regulating factor -- JA jasmonic acid -- knox knotted1-like homeobox -- NAD nicotinamide adenine dinucleotide -- old onset of leaf death -- ore1 oresara1 -- rev revoluta -- tcp teosinte branched1, cycloidea, proliferating cell nuclear antigen binding factor -- TAS trans-acting RNA -- TFs transcription factors; Ethylene -- Development -- miRNA -- Regulation -- Transcription factor -- Senescence; Botany -- Periodicals; Botanique -- Périodiques; 580
• DOI: 10.1016/j.plantsci.2018.08.006
• Languages: English
• ISSNs: 0168-9452

Abstract

Highlights: Developmental stage-dependent consequences of ethylene on leaves. Roles of developmental regulators in leaf senescence. Regulatory modules intertwined in leaf morphogenesis/differentiation and senescence. Abstract: Leaf senescence is the final step of leaf development and is usually accompanied by visible color changes from green to yellow or brown. Unlike the senescence of the whole body of animals and unicellular organisms, which is often associated with death, leaf senescence in plants requires highly integrative processes towards cell death with nutrient recycling and storage. Since leaf senescence plays pivotal roles in the production of plant biomass and grain yield, the mechanisms of degradation and relocation of macromolecules as well as the regulation of signaling and biosynthetic pathways have received much attention. The importance of the plant hormone ethylene in the onset of leaf senescence has been clearly documented. However, research has increasingly demonstrated that the function of ethylene in the regulation of leaf senescence is dependent on leaf development. This review raises the issue of how ethylene requires developmental regulators and focuses on the developmental aspect of leaf senescence. It also emphasizes the remarkable impact that developmental regulators have on regulating the onset of leaf senescence.