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Phosphate (Pi) availability is a major factor limiting plant growth and development. The key transcription factor controlling Pi‐starvation response (PSR) is PHOSPHATE STARVATION RESPONSE 1 (PHR1) whose transcript levels do not change with changes in Pi levels. However, how PHR1 stability is regulated at the post‐translational level is relatively unexplored in Arabidopsis thaliana.
Inositol polyphosphates...
Nitrogen deficiency (−N) in plants triggers leaf senescence which is regulated by the transcription factor ORE1. Little is known about post‐translational regulation of ORE1 in this process. Here, we show that UBP12/UBP13 (ubiquitin‐specific protease 12/13) antagonize the action of NLA (nitrogen limitation adaptation) E3 ligase to maintain ORE1 homeostasis.
In vitro pull‐down and in vivo co‐immunoprecipitation...
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