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The leaf economics spectrum of triploid and tetraploid C 4 grass Miscanthus  x  giganteus

Journal Article · · Plant, Cell and Environment
DOI:https://doi.org/10.1111/pce.14433· OSTI ID:1888055
 [1];  [2];  [2];  [3];  [4];  [5];  [4];  [6];  [6];  [7];  [8];  [9]
  1. Center for Advanced Bioenergy and Bioproducts Innovation University of Illinois at Urbana‐Champaign Urbana Illinois USA, Carl R. Woese Institute for Genomic Biology University of Illinois at Urbana‐Champaign Illinois Urbana USA, Institute for Sustainability, Energy, and Environment University of Illinois at Urbana‐Champaign Urbana Illinois USA
  2. Carl R. Woese Institute for Genomic Biology University of Illinois at Urbana‐Champaign Illinois Urbana USA, Global Change and Photosynthesis Research Unit, USDA ARS Urbana Illinois USA
  3. Center for Advanced Bioenergy and Bioproducts Innovation University of Illinois at Urbana‐Champaign Urbana Illinois USA, Department of Plant Biology University of Illinois at Urbana‐Champaign Urbana Illinois USA
  4. Center for Advanced Bioenergy and Bioproducts Innovation University of Illinois at Urbana‐Champaign Urbana Illinois USA, Department of Crop Sciences University of Illinois at Urbana‐Champaign Urbana Illinois USA
  5. Department of Crop Sciences University of Illinois at Urbana‐Champaign Urbana Illinois USA
  6. Department of Plant and Soil Sciences Mississippi State University Starkville Mississippi USA
  7. Carl R. Woese Institute for Genomic Biology University of Illinois at Urbana‐Champaign Illinois Urbana USA, Department of Plant Sciences University of Cambridge Cambridge UK
  8. Center for Advanced Bioenergy and Bioproducts Innovation University of Illinois at Urbana‐Champaign Urbana Illinois USA, Carl R. Woese Institute for Genomic Biology University of Illinois at Urbana‐Champaign Illinois Urbana USA, Department of Plant Biology University of Illinois at Urbana‐Champaign Urbana Illinois USA
  9. Center for Advanced Bioenergy and Bioproducts Innovation University of Illinois at Urbana‐Champaign Urbana Illinois USA, Carl R. Woese Institute for Genomic Biology University of Illinois at Urbana‐Champaign Illinois Urbana USA, Global Change and Photosynthesis Research Unit, USDA ARS Urbana Illinois USA, Department of Plant Biology University of Illinois at Urbana‐Champaign Urbana Illinois USA
Abstract

The leaf economics spectrum (LES) describes multivariate correlations in leaf structural, physiological and chemical traits, originally based on diverse C 3 species grown under natural ecosystems. However, the specific contribution of C 4 species to the global LES is studied less widely. C 4 species have a CO 2 concentrating mechanism which drives high rates of photosynthesis and improves resource use efficiency, thus potentially pushing them towards the edge of the LES. Here, we measured foliage morphology, structure, photosynthesis, and nutrient content for hundreds of genotypes of the C 4 grass Miscanthus ×  giganteus grown in two common gardens over two seasons. We show substantial trait variations across M .×  giganteus genotypes and robust genotypic trait relationships. Compared to the global LES, M .×  giganteus genotypes had higher photosynthetic rates, lower stomatal conductance, and less nitrogen content, indicating greater water and photosynthetic nitrogen use efficiency in the C 4 species. Additionally, tetraploid genotypes produced thicker leaves with greater leaf mass per area and lower leaf density than triploid genotypes. By expanding the LES relationships across C 3 species to include C 4 crops, these findings highlight that M .×  giganteus occupies the boundary of the global LES and suggest the potential for ploidy to alter LES traits.

Research Organization:
Center for Advanced Bioenergy and Bioproducts Innovation (CABBI), Urbana, IL (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Biological and Environmental Research (BER)
Grant/Contract Number:
SC0018420
OSTI ID:
1888055
Alternate ID(s):
OSTI ID: 1888057
OSTI ID: 1996361
Journal Information:
Plant, Cell and Environment, Journal Name: Plant, Cell and Environment Journal Issue: 12 Vol. 45; ISSN 0140-7791
Publisher:
Wiley-BlackwellCopyright Statement
Country of Publication:
United Kingdom
Language:
English

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