PLASTID MOVEMENT IMPAIRED1 and PLASTID MOVEMENT IMPAIRED1-RELATED1 Mediate Photorelocation Movements of Both Chloroplasts and Nuclei

Plant Physiology
Noriyuki SuetsuguMasamitsu Wada

Abstract

Organelle movement and positioning play important roles in fundamental cellular activities and adaptive responses to environmental stress in plants. To optimize photosynthetic light utilization, chloroplasts move toward weak blue light (the accumulation response) and escape from strong blue light (the avoidance response). Nuclei also move in response to strong blue light by utilizing the light-induced movement of attached plastids in leaf cells. Blue light receptor phototropins and several factors for chloroplast photorelocation movement have been identified through molecular genetic analysis of Arabidopsis (Arabidopsis thaliana). PLASTID MOVEMENT IMPAIRED1 (PMI1) is a plant-specific C2-domain protein that is required for efficient chloroplast photorelocation movement. There are two PLASTID MOVEMENT IMPAIRED1-RELATED (PMIR) genes, PMIR1 and PMIR2, in the Arabidopsis genome. However, the mechanism in which PMI1 regulates chloroplast and nuclear photorelocation movements and the involvement of PMIR1 and PMIR2 in these organelle movements remained unknown. Here, we analyzed chloroplast and nuclear photorelocation movements in mutant lines of PMI1, PMIR1, and PMIR2. In mesophyll cells, the pmi1 single mutant showed severe defects i...Continue Reading

Citations

Jan 23, 2016·Journal of Plant Research·Sam-Geun Kong, Masamitsu Wada
Mar 18, 2016·Plant & Cell Physiology·Matt StataRowan F Sage
May 21, 2016·Frontiers in Plant Science·Noriyuki Suetsugu, Masamitsu Wada
Sep 1, 2016·Proceedings of the National Academy of Sciences of the United States of America·Noriyuki SuetsuguMasamitsu Wada
Nov 20, 2016·Plant, Cell & Environment·Noriyuki SuetsuguMasamitsu Wada
Jan 31, 2018·Journal of Cell Science·Masamitsu Wada, Sam-Geun Kong
Jul 15, 2020·Plant Cell Reports·Weronika KrzeszowiecHalina Gabryś
Nov 15, 2016·Proceedings of the Japan Academy. Series B, Physical and Biological Sciences·Masamitsu Wada
Mar 31, 2020·Photosynthesis Research·Arkajo Majumdar, Rup Kumar Kar

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