Daniela Liebsch1, Olivier Keech2. 1. Department of Plant Physiology, UPSC, Umeå University, Umeå, S-90187, Sweden. 2. Department of Plant Physiology, UPSC, Umeå University, Umeå, S-90187, Sweden. olivier.keech@umu.se.
Abstract
563 I. 563 II. 564 III. 564 IV. 565 V. 565 VI. 567 VII. 567 568 References 568 SUMMARY: Leaf senescence - the coordinated, active process leading to the organized dismantling of cellular components to remobilize resources - is a fundamental aspect of plant life. Its tight regulation is essential for plant fitness and has crucial implications for the optimization of plant productivity and storage properties. Various investigations have shown light deprivation and light perception via phytochromes as key elements modulating senescence. However, the signalling pathways linking light deprivation and actual senescence processes have long remained obscure. Recent analyses have demonstrated that PHYTOCHROME-INTERACTING FACTORS (PIFs) are major transcription factors orchestrating dark-induced senescence (DIS) by targeting chloroplast maintenance, chlorophyll metabolism, hormone signalling and production, and the expression of senescence master regulators, uncovering potential molecular links to the energy deprivation signalling pathway. PIF-dependent feed-forward regulatory modules might be of critical importance for the highly complex and initially light-reversible DIS induction.
563 I. 563 II. 564 III. 564 IV. 565 V. 565 VI. 567 VII. 567 568 References 568 SUMMARY: Leaf senescence - the coordinated, active process leading to the organized dismantling of cellular components to remobilize resources - is a fundamental aspect of plant life. Its tight regulation is essential for plant fitness and has crucial implications for the optimization of plant productivity and storage properties. Various investigations have shown light deprivation and light perception via phytochromes as key elements modulating senescence. However, the signalling pathways linking light deprivation and actual senescence processes have long remained obscure. Recent analyses have demonstrated that PHYTOCHROME-INTERACTING FACTORS (PIFs) are major transcription factors orchestrating dark-induced senescence (DIS) by targeting chloroplast maintenance, chlorophyll metabolism, hormone signalling and production, and the expression of senescence master regulators, uncovering potential molecular links to the energy deprivation signalling pathway. PIF-dependent feed-forward regulatory modules might be of critical importance for the highly complex and initially light-reversible DIS induction.
Authors: Minerva S Trejo-Arellano; Saher Mehdi; Jennifer de Jonge; Eva Dvorák Tomastíková; Claudia Köhler; Lars Hennig Journal: Plant Physiol Date: 2019-12-02 Impact factor: 8.340
Authors: Simon R Law; Daria Chrobok; Marta Juvany; Nicolas Delhomme; Pernilla Lindén; Bastiaan Brouwer; Abdul Ahad; Thomas Moritz; Stefan Jansson; Per Gardeström; Olivier Keech Journal: Plant Physiol Date: 2018-03-09 Impact factor: 8.340