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

Margaret M. Barbour; Charles R. Warren; Graham D. Farquhar; Guy Forrester; Hamish Brown

doi:10.1111/j.1365-3040.2010.02138.x

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

Margaret M. Barbour^*, Charles R. Warren, Graham D. Farquhar, Guy Forrester, Hamish Brown

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

133 Citations (Scopus)

Abstract

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

Original language	English
Pages (from-to)	1176-1185
Number of pages	10
Journal	Plant, Cell and Environment
Volume	33
Issue number	7
DOIs	https://doi.org/10.1111/j.1365-3040.2010.02138.x
Publication status	Published - Jul 2010

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

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.",

keywords = "Hordeum vulgare, Leaf internal conductance, Photosynthesis, Stomatal conductance, Water use efficiency",

author = "Barbour, \{Margaret M.\} and Warren, \{Charles R.\} and Farquhar, \{Graham D.\} and Guy Forrester and Hamish Brown",

year = "2010",

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language = "English",

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T1 - Variability in mesophyll conductance between barley genotypes, and effects on transpiration efficiency and carbon isotope discrimination

AU - Barbour, Margaret M.

AU - Warren, Charles R.

AU - Farquhar, Graham D.

AU - Forrester, Guy

AU - Brown, Hamish

PY - 2010/7

Y1 - 2010/7

N2 - 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.

AB - 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.

KW - Hordeum vulgare

KW - Leaf internal conductance

KW - Photosynthesis

KW - Stomatal conductance

KW - Water use efficiency

UR - https://www.scopus.com/pages/publications/77954747235

U2 - 10.1111/j.1365-3040.2010.02138.x

DO - 10.1111/j.1365-3040.2010.02138.x

M3 - Article

SN - 0140-7791

VL - 33

SP - 1176

EP - 1185

JO - Plant, Cell and Environment

JF - Plant, Cell and Environment

IS - 7

ER -

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

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