C 4 anatomy can evolve via a single developmental change.

Autor: Lundgren MR; Department of Animal and Plant Sciences, University of Sheffield, Western Bank, Sheffield, S10 2TN, UK., Dunning LT; Department of Animal and Plant Sciences, University of Sheffield, Western Bank, Sheffield, S10 2TN, UK., Olofsson JK; Department of Animal and Plant Sciences, University of Sheffield, Western Bank, Sheffield, S10 2TN, UK., Moreno-Villena JJ; Department of Animal and Plant Sciences, University of Sheffield, Western Bank, Sheffield, S10 2TN, UK., Bouvier JW; Department of Animal and Plant Sciences, University of Sheffield, Western Bank, Sheffield, S10 2TN, UK., Sage TL; Department of Ecology and Evolutionary Biology, University of Toronto, 25 Willcocks Street, Toronto, ON, M5S 3B2, Canada., Khoshravesh R; Department of Ecology and Evolutionary Biology, University of Toronto, 25 Willcocks Street, Toronto, ON, M5S 3B2, Canada., Sultmanis S; Department of Ecology and Evolutionary Biology, University of Toronto, 25 Willcocks Street, Toronto, ON, M5S 3B2, Canada., Stata M; Department of Ecology and Evolutionary Biology, University of Toronto, 25 Willcocks Street, Toronto, ON, M5S 3B2, Canada., Ripley BS; Botany Department, Rhodes University, Grahamstown, 6139, South Africa., Vorontsova MS; Comparative Plant and Fungal Biology, Royal Botanic Gardens, Kew, Richmond, Surrey, TW9 3AB, UK., Besnard G; Laboratoire Évolution & Diversité Biologique (EDB UMR5174), Université de Toulouse, CNRS, ENSFEA, UPS, IRD, 118 route de Narbonne, 31062, Toulouse, France., Adams C; Botany Department, Rhodes University, Grahamstown, 6139, South Africa., Cuff N; Northern Territory Herbarium, Department of Environment and Natural Resources, PO Box 496, Palmerston, NT, 0831, Australia., Mapaura A; National Herbarium and Botanic Garden, Harare, Zimbabwe., Bianconi ME; Department of Animal and Plant Sciences, University of Sheffield, Western Bank, Sheffield, S10 2TN, UK., Long CM; Department of Primary Industry and Fisheries, Northern Territory Government, Darwin, NT, 0801, Australia., Christin PA; Department of Animal and Plant Sciences, University of Sheffield, Western Bank, Sheffield, S10 2TN, UK., Osborne CP; Department of Animal and Plant Sciences, University of Sheffield, Western Bank, Sheffield, S10 2TN, UK.
Jazyk: angličtina
Zdroj: Ecology letters [Ecol Lett] 2019 Feb; Vol. 22 (2), pp. 302-312. Date of Electronic Publication: 2018 Dec 17.
DOI: 10.1111/ele.13191
Abstrakt: C 4 photosynthesis is a complex trait that boosts productivity in warm environments. Paradoxically, it evolved independently in numerous plant lineages, despite requiring specialised leaf anatomy. The anatomical modifications underlying C 4 evolution have previously been evaluated through interspecific comparisons, which capture numerous changes besides those needed for C 4 functionality. Here, we quantify the anatomical changes accompanying the transition between non-C 4 and C 4 phenotypes by sampling widely across the continuum of leaf anatomical traits in the grass Alloteropsis semialata. Within this species, the only trait that is shared among and specific to C 4 individuals is an increase in vein density, driven specifically by minor vein development that yields multiple secondary effects facilitating C 4 function. For species with the necessary anatomical preconditions, developmental proliferation of veins can therefore be sufficient to produce a functional C 4 leaf anatomy, creating an evolutionary entry point to complex C 4 syndromes that can become more specialised.
(© 2018 The Authors Ecology Letters published by CNRS and John Wiley & Sons Ltd.)
Databáze: MEDLINE
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