Variability in mesophyll conductance between barley genotypes, and effects on transpiration efficiency and carbon isotope discrimination

Publication Type:Journal Article
Year of Publication:2010
Authors:BARBOUR, MARGARETM, WARREN, CHARLESR, FARQUHAR, GRAHAMD, FORRESTER, GUY, BROWN, HAMISH
Journal:Plant, Cell & Environment
Volume:33
Issue:7
Date Published:2010
ISBN Number:1365-3040
Keywords:Hordeum, Hordeum vulgare, leaf internal conductance, photosynthesis, stomatal conductance, water use efficiency
Abstract:

Leaf internal, or mesophyll, conductance to CO2 (gm) is a significant and variable limitation of photosynthesis that also affects leaf transpiration efficiency (TE). Genotypic variation in gm and the effect of gm on TE were assessed in six barley genotypes (four Hordeum vulgare and two H. bulbosum). Significant variation in gm was found between genotypes, and was correlated with photosynthetic rate. The genotype with the highest gm also had the highest TE and the lowest carbon isotope discrimination as recorded in leaf tissue (Δp). These results suggest gm has unexplored potential to provide TE improvement within crop breeding programmes.

URL:http://dx.doi.org/10.1111/j.1365-3040.2010.02138.x
Short Title:Plant, Cell & Environment
Fri, 2014-01-24 22:44 -- admin
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith