1. Modulation of auxin signalling through DIAGETROPICA and ENTIRE differentially affects tomato plant growth via changes in photosynthetic and mitochondrial metabolism
- Author
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Willian, Batista-Silva, David B, Medeiros, Acácio, Rodrigues-Salvador, Danilo M, Daloso, Rebeca P, Omena-Garcia, Franciele Santos, Oliveira, Lilian Ellen, Pino, Lázaro Eustáquio Pereira, Peres, Adriano, Nunes-Nesi, Alisdair R, Fernie, Agustín, Zsögön, and Wagner L, Araújo
- Subjects
Chlorophyll ,Plant Leaves ,Indoleacetic Acids ,Solanum lycopersicum ,Plant Growth Regulators ,Plant Stomata ,Water ,Photosynthesis ,Mitochondria ,Signal Transduction - Abstract
Auxin modulates a range of plant developmental processes including embryogenesis, organogenesis, and shoot and root development. Recent studies have shown that plant hormones also strongly influence metabolic networks, which results in altered growth phenotypes. Modulating auxin signalling pathways may therefore provide an opportunity to alter crop performance. Here, we performed a detailed physiological and metabolic characterization of tomato (Solanum lycopersicum) mutants with either increased (entire) or reduced (diageotropica-dgt) auxin signalling to investigate the consequences of altered auxin signalling on photosynthesis, water use, and primary metabolism. We show that reduced auxin sensitivity in dgt led to anatomical and physiological modifications, including altered stomatal distribution along the leaf blade and reduced stomatal conductance, resulting in clear reductions in both photosynthesis and water loss in detached leaves. By contrast, plants with higher auxin sensitivity (entire) increased the photosynthetic capacity, as deduced by higher V
- Published
- 2018