Journal
PLANT SIGNALING & BEHAVIOR
Volume 13, Issue 12, Pages -Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/15592324.2018.1550317
Keywords
OHP1; one-helix protein; Arabidopsis; high light acclimation; photosynthesis and repair of photosynthetic complexes under light stress
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Plant ONE-HELIX PROTEINS (OHPs) are part of the light-harvesting complex superfamily whose members are involved in various processes related to sensing and capturing light as well as light protection. We recently showed the requirement of a functional OHP1-OHP2 heterodimer for efficient D1 synthesis. Interestingly, while the ohp1 knockout mutant showed a strong defect in accumulation of the photosystem II and is hardly viable, virus-induced gene silencing of OHP1 had no detectable impact on plant growth and performance under standard growth conditions. However, in vivo labeling assays with S-35-methionine indicate a reduced D1 synthesis rate. Here, we show that VIGS-OHP1 plants are more susceptible towards elevated light intensities than control plants. This underlines an obligatory function of OHP1 for light acclimation.
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