Agricultural and Biological Sciences
7 years ago

Discovery of key enzyme unlocks potential for sustainable plant degradation process

Journal of Plant Physiology
Mg-dechelation of chlorophyll a by Stay-Green activates chlorophyll b degradation through expressing Non-Yellow Coloring 1 in Arabidopsis thaliana
Tomoaki Sato, Yousuke Shimoda, Kaori Matsuda, Ayumi Tanaka, Hisashi Itô

Paper Summary

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Chlorophyll a degradation in plants starts with removing magnesium, done by a protein called Stay-Green (SGR). SGR doesn't touch chlorophyll b, which needs to turn into chlorophyll a before breaking down. Non-Yellow Coloring 1 (NYC1) helps with this conversion. When SGR is boosted in Arabidopsis plants, both chlorophyll types break down. Without NYC1, chlorophyll b doesn't degrade properly. This shows that SGR triggers chlorophyll b breakdown by increasing NYC1 levels. This process helps regulate plant metabolism effectively.