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Ecophysiological performance of four species of Clusiaceae with different modes of photosynthesis in a mosaic of riverine, rupestrian grasslands, and cerrado vegetation in SE-Brazil

Mattos, Eduardo ; Scarano, Fabio ; Cavalin, Pedro ; Fernandes, G. ; Rennenberg, Heinz ; Lüttge, Ulrich

Trees, 2019, Vol.33(3), pp.641-652 [Periódico revisado por pares]

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  • Título:
    Ecophysiological performance of four species of Clusiaceae with different modes of photosynthesis in a mosaic of riverine, rupestrian grasslands, and cerrado vegetation in SE-Brazil
  • Autor: Mattos, Eduardo ; Scarano, Fabio ; Cavalin, Pedro ; Fernandes, G. ; Rennenberg, Heinz ; Lüttge, Ulrich
  • Assuntos: Clusiaceae ; Crassulacean acid metabolism (CAM) ; CAM-cycling ; C-photosynthesis ; Mosaic of tropical vegetation ; Plant adaptations
  • É parte de: Trees, 2019, Vol.33(3), pp.641-652
  • Descrição: Byline: Eduardo A. Mattos (1), Fabio R. Scarano (1,2), Pedro O. Cavalin (1), G. Wilson Fernandes (3), Heinz Rennenberg (4), Ulrich Luttge (5) Keywords: Clusiaceae; Crassulacean acid metabolism (CAM); CAM-cycling; C.sub.3-photosynthesis; Mosaic of tropical vegetation; Plant adaptations Abstract: Key message Among four species of Clusiaceae (sensu lato) occurring in a mosaic of different types of tropical vegetation, Kielmeyera coriacea Mart. & Zucc. and Calophyllum brasiliense Camb. were C.sub.3-species with similar performance at micro-sites of contrasting water supply, Clusia criuva Cambess--although potentially a C.sub.3/CAM intermediate species--performed C.sub.3-photosynthesis, while Clusia arrudea Planchon & Triana ex Engl. performed C.sub.3-photosynthesis or CAM-cycling depending on site characteristics and dry or wet season. Depending on individual species, C.sub.3-photosynthesis proves to be a suitable option at a variety of environmental conditions, while CAM-cycling appears to be an escape under more severe stress. Abstract In this ecophysiological field work, we investigated possible microhabitat-dependent expression of modes of photosynthesis among species of Clusiaceae (sensu lato) in a mosaic of tropical vegetation. The study site was in the Serra de Sao Jose (21[degrees]08'S, 44[degrees]17 W in the municipality of Tiradentes, state of Minas Gerais, SE-Brazil). The mosaic of tropical vegetation types was made up of rupestrian grasslands, cerrado, small rock outcrops, and riverine and gallery forest alongside a small river. Four species were measured, namely C. criuva Camb., C. arrudea Planchon & Triana ex Engl., K. coriacea Mart. & Zucc., and C. brasiliense Camb. K. coriacea and C. brasiliense performed C.sub.3-photosynthesis with midday depressions and reversible acute photoinhibition in response to varying environmental conditions related to habitat types and wet and dry seasons, respectively. The C.sub.3/CAM intermediate C. criuva also performed C.sub.3-photosynthesis with midday depression and acute photoinhibition. It appeared not to be stressed enough to switch to its intrinsic CAM option. In contrast, while C. arrudea under favourable conditions in the gallery forest and the wet season also performed C.sub.3-photosynthesis, under drier conditions, it used CAM-cycling. For particular species, realization of CAM-options is a possibility of acclimation. Other species contemporarily may rely on different alternatives such as plastic performance of C.sub.3-photoynthesis. At the microsite level, overlapping functional diversity of species and diversity of habitats contributes to the complexity of this vegetation type. Author Affiliation: (1) 0000 0001 2294 473X, grid.8536.8, Departamento de Ecologia, Universidade Federal do Rio de Janeiro (UFRJ), CCS, IB, Caixa Postal 68020, Rio de Janeiro, RJ, CEP 21941-970, Brazil (2) Fundacao Brasileira para o Desenvolvimento Sustentavel, Rua Engenheiro Alvaro Niemeyer 76, Rio de Janeiro, RJ, CEP 22610-180, Brazil (3) 0000 0001 2181 4888, grid.8430.f, Lab. Ecologia Evolutiva e Biodiversidade/IBC, Universidade Federal de Minas Gerais, P.O. Box 486, Belo Horizonte, CEP 30161-970, Brazil (4) grid.5963.9, Institut fur Forstwissenschaften und Baumphysiologie, Professur fur Baumphysiologie, Freiburg University, Georges-Kohler-Allee 53/54, 79085, Freiburg, Germany (5) 0000 0001 0940 1669, grid.6546.1, Department of Biology, Darmstadt University of Technology, Schnittspahnstrasse 3-5, 64287, Darmstadt, Germany Article History: Registration Date: 19/12/2018 Received Date: 15/11/2018 Accepted Date: 19/12/2018 Online Date: 04/01/2019 Article note: Communicated by R. Guy. The authors dedicate this work to Professor Dr. h.c. Erwin Beck on the occasion of his 80th birthday.
  • Idioma: Inglês

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