bioRxivJClub
Guanosine tetraphosphate (ppGpp) promotes tolerance to 2 excess light in Arabidopsis thaliana.
bioRxiv · · Preprint · Open access
Romand, Hu + 12 more
Abstract ↗AI summary
The abstract is read at the publisher; the summary is JClub's.
Over-accumulating guanosine tetraphosphate (ppGpp) in Arabidopsis thaliana via RSH3 overexpression increases tolerance to excess light.
- Why it matters: The specific stresses that involve ppGpp signalling in plants are not fully defined, limiting understanding of how plants acclimate to changing environments.
- What they did: The study used transgenic Arabidopsis thaliana lines overexpressing RSH3 (OX:RSH3) to test excess-light acclimation and measured photosynthetic responses including NPQ.
- The result: Although OX:RSH3 plants showed higher NPQ than wild type, NPQ was not critical; instead, ppGpp accumulation produced broad physiological priming, and ppGpp levels rose after excess light exposure.
The findingWhy it mattersWhat they didThe result
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