New phenotyping methods for screening wheat and barley for beneficial responses to water deficit

This review considers stomatal conductance as an indicator of genotypic differences in the growth response to water stress. The benefits of using stomatal conductance are compared with photosynthetic rate and other indicators of genetic variation in water stress tolerance, along with the use of mode...

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Bibliographic Details
Published in:Journal of experimental botany 2010-08, Vol.61 (13), p.3499-3507
Main Authors: Munns, Rana, James, Richard A, Sirault, Xavier R.R, Furbank, Robert T, Jones, Hamlyn G
Format: Article
Language:English
Subjects:
Barley
Biological and medical sciences
Botany - methods
Chlorophyll fluorescence
Dehydration
Dehydration - metabolism
drought tolerance
Fluorescence
Fundamental and applied biological sciences. Psychology
Genetic Variation
Genotype
Hordeum - genetics
Hordeum - growth & development
Hordeum - physiology
Hydroponics
Imaging
IR thermography
mannitol
PEG
Phenotype
Photosynthesis - physiology
Plant growth
Plant Leaves - growth & development
Plant Leaves - metabolism
Plant Stomata - metabolism
Plants
polyethylene glycol
REVIEW PAPER
salinity
Sodium Chloride - metabolism
Soil water
Soil water deficit
Stomatal conductance
Thermography
Triticum - genetics
Triticum - growth & development
Triticum - physiology
Water - physiology
water productivity
water use efficiency
Wheat
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Summary:This review considers stomatal conductance as an indicator of genotypic differences in the growth response to water stress. The benefits of using stomatal conductance are compared with photosynthetic rate and other indicators of genetic variation in water stress tolerance, along with the use of modern phenomics technologies. Various treatments for screening for genetic diversity in response to water deficit in controlled environments are considered. There is no perfect medium: there are pitfalls in using soil in pots, and in using hydroponics with ionic and non-ionic osmotica. Use of mixed salts or NaCl is recommended over non-ionic osmotica. Developments in infrared thermography provide new and feasible screening methods for detecting genetic variation in the stomatal response to water deficit in controlled environments and in the field.
ISSN:0022-0957
1460-2431
DOI:10.1093/jxb/erq199