Carbon isotope discrimination varies genetically in C4 species

Hubick, Kerry T., Hammer, Graeme L., Farquhar, Graham D., Wade, Len J., von Caemmerer, Susanne and Henderson, Sally A. (1990) Carbon isotope discrimination varies genetically in C4 species. Plant Physiology, 92 2: 534-537. doi:10.1104/pp.92.2.534

Author Hubick, Kerry T.
Hammer, Graeme L.
Farquhar, Graham D.
Wade, Len J.
von Caemmerer, Susanne
Henderson, Sally A.
Title Carbon isotope discrimination varies genetically in C4 species
Formatted title
Carbon isotope discrimination varies genetically in C4 species
Journal name Plant Physiology   Check publisher's open access policy
ISSN 0032-0889
Publication date 1990-02
Sub-type Other
DOI 10.1104/pp.92.2.534
Volume 92
Issue 2
Start page 534
End page 537
Total pages 4
Place of publication Rockville, MD, United States
Publisher American Society of Plant Biologists
Language eng
Formatted abstract
Carbon-isotope discrimination (Δ) is used to distinguish between different photosynthetic pathways. It has also been shown that variation in Δ occurs among varieties of C3 species, but not as yet, in C4 species. We now report that Δ also varies among genotypes of sorghum (Sorghum bicolor Moench), a C4 species. The discrimination in leaves of field-grown plants of 12 diverse genotypes of sorghum was measured and compared with their grain yields. Discrimination varied significantly among genotypes, and there was a significant negative correlation between grain yield and Δ. The variation in Δ may be caused by genetic differences in either leakiness of the bundle-sheath cells or by differences in the ratio of assimilation rate to stomatal conductance. At the leaf level, the former should be related to light-use efficiency of carbon fixation and the latter should be related to transpiration efficiency. Both could relate to the yield of the crop.
Q-Index Code CX
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Other
Collection: Queensland Alliance for Agriculture and Food Innovation
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Created: Mon, 07 Mar 2011, 15:32:56 EST