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Thermo-induced maintenance of photo-oxidoreductases underlies plant autotrophic development

Cited 6 time in Web of Science Cited 6 time in Scopus
Authors
Ha, Jun-Ho; Lee, Hyo-Jun; Jung, Jae-Hoon; Park, Chung-Mo
Issue Date
2017-04
Citation
Developmental Cell, Vol.41 No.2, p. 170
Keywords
autotrophic transitionchlorophyll biosynthesisFCAreactive oxygen speciesthermomorphogenesis
Abstract
Chlorophyll biosynthesis enables autotrophic development of developing seedlings. Upon light exposure, the chlorophyll precursor protochlorophyllide produces reactive oxygen species (ROS). Developing seedlings acquire photosynthetic competence through the action of protochlorophyllide oxidoreductases (PORs) that convert protochlorophyllide to chlorophyllide, reducing ROS production that would otherwise induce cellular damage and chlorophyll bleaching. Here, we show that FCA mediates the thermostabilization of PORs to trigger the conversion of protochlorophyllide to chlorophyllide in developing seedlings. FCA also facilitates the thermal induction of POR genes through histone acetylation that promotes the accessibility of RNA polymerases to the gene promoters. The combined action of FCA maintains PORs at warm temperatures, shifting the chlorophyll-ROS balance toward autotrophic development. We propose that the FCA-mediated thermal adaptation of autotrophic development allows developing seedlings to cope with the heat-absorbing soil surface layer under natural conditions. The thermal adaptive mechanism would provide a potential basis for studying crop performance at warm temperatures.
ISSN
1534-5807
URI
https://hdl.handle.net/10371/171983
DOI
https://doi.org/10.1016/j.devcel.2017.03.005
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College of Natural Sciences (자연과학대학)Dept. of Chemistry (화학부)Journal Papers (저널논문_화학부)
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