Hierarchy amongst photosynthetic acclimation responses for plant fitness

Authors: Frenkel, Martin; Bellafiore, Stephane; Rochaix, Jean-David; Jansson, Stefan

Source: Physiologia Plantarum, Volume 129, Number 2, February 2007 , pp. 455-459(5)

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Abstract:

We have compared the seed production of Arabidopsis wild-type and mutant plants impaired in the regulation of the photosynthetic light reactions grown under natural conditions in the field. Mutant plants (npq4) lacking feedback de-excitation were, as previously demonstrated, severely affected in seed production. Seed sets of plants deficient in state transitions (stn7) were 19% smaller than those of wild-type plants, whereas plants missing the STN8 kinase required for the phosphorylation of the core photosystem II reaction centre polypeptides (stn8) had a normal seed production. Plants lacking both STN7 and STN8 kinases were strongly affected, indicating that these mutations act synergistically. In contrast, npq4×stn7 double mutants had the same seed set as npq4 mutants.

Document Type: Research article

DOI: http://dx.doi.org/10.1111/j.1399-3054.2006.00831.x

Affiliations: 1: Department of Molecular Biology and Department of Plant Biology, University of Geneva, 30 Quai Ernest Ansermet, 1211 Geneva 4, Switzerland

Publication date: 2007-02-01