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

被引：126

作者：

Barbour, Margaret M. ^{[1
,2
]}

Warren, Charles R. ^{[3
]}

Farquhar, Graham D. ^{[4
]}

Forrester, Guy ^{[1
]}

Brown, Hamish ^{[5
]}

机构：

[1] Landcare Res, Lincoln 7640, New Zealand

[2] Univ Sydney, Fac Agr Food & Nat Resources, Sydney, NSW 2567, Australia

[3] Univ Sydney, Sch Biol Sci, Sydney, NSW 2006, Australia

[4] Australian Natl Univ, Res Sch Biol, Environm Biol Grp, Canberra, ACT 2601, Australia

[5] New Zealand Inst Plant & Food Res, Christchurch, New Zealand

来源：

PLANT CELL AND ENVIRONMENT | 2010年 / 33卷 / 07期

关键词：

Hordeum vulgare; leaf internal conductance; photosynthesis; stomatal conductance; water use efficiency; WATER-USE EFFICIENCY; INTERNAL CONDUCTANCE; PHOTOSYNTHETIC CAPACITY; CO2; DIFFUSION; LEAF ANATOMY; NITROGEN USE; YIELD; LIGHT; FIELD; DELTA-C-13;

D O I：

10.1111/j.1365-3040.2010.02138.x

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

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 (Delta(p)). These results suggest g(m) has unexplored potential to provide TE improvement within crop breeding programmes.

引用

页码：1176 / 1185

页数：10

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