Genetic variation in tolerance to the osmotic stress componentof salinity stress in durum wheat

Functional Plant Biology : FPB
Richard A JamesR. Munns

Abstract

Salinity affects plant growth by the osmotic stress of the salt around the roots as well as by toxicity caused by excessive accumulation of salt in leaves. The aim of this study was to determine whether there is significant genetic variation in tolerance to osmotic stress that can be useful in improving the salinity tolerance of crop plants. Durum wheat is a salt-sensitive crop whose yield is reduced by moderately saline soils. Genetic variation in tolerance to osmotic stress in durum wheat was examined in 50 international durum varieties and landraces by measuring the response of stomatal conductance to salt stress before salts built up in the leaf. Stomatal conductance is a sensitive indicator of the osmotic stress because it is reduced immediately with the onset of salinity, and is the initial and most profound cause of a decline in CO2 assimilation rate. Genetic differences of 2-3-fold were found in the magnitude of the response of stomatal conductance to salt-induced osmotic stress. Higher stomatal conductance in salt related to higher CO2 assimilation rate. There was a positive relationship between stomatal conductance and relative growth rate in salt. This study shows the potential for new genetic gains in salt tolerance...Continue Reading

References

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Mar 21, 2003·Annals of Botany·Mark Tester, Romola Davenport
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Jan 1, 2002·Functional Plant Biology : FPB·Richard A JamesSusanne von Caemmerer
Dec 1, 2004·Functional Plant Biology : FPB·Megan P LindsayRana Munns
Aug 1, 2002·Functional Plant Biology : FPB·Anna Rita RivelliA G Tony Condon

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Citations

Apr 1, 2012·Functional Plant Biology : FPB·Joaquim M CostaMaria M Chaves
Dec 5, 2008·Plant, Cell & Environment·Karthika RajendranStuart J Roy
Mar 24, 2012·Journal of Experimental Botany·Ehsan TavakkoliGlenn K McDonald
Jul 8, 2010·Journal of Experimental Botany·Rana MunnsHamlyn G Jones
Nov 27, 2015·The New Phytologist·Yusuf GencGraham H Lyons
Oct 7, 2016·Annals of Botany·S NegrãoM Tester
Dec 1, 2016·Functional Plant Biology : FPB·Rana MunnsTimothy D Colmer
Nov 1, 2009·Functional Plant Biology : FPB·Guo Yu QiuSadanori Sase
May 1, 2013·Functional Plant Biology : FPB·Megan C SheldenAntony Bacic
Nov 1, 2017·Functional Plant Biology : FPB·Joanne TilbrookStuart J Roy
Jul 8, 2020·Biomolecules·Riyazuddin RiyazuddinRavi Gupta
Dec 2, 2010·Journal of Experimental Botany·Afrasyab RahnamaMichelle Watt
Nov 29, 2012·Journal of Experimental Botany·Yuri Shavrukov
Jun 13, 2017·PloS One·Jaswant S KhokharMartin R Broadley
Nov 1, 2009·Functional Plant Biology : FPB·Xavier R R SiraultRobert T Furbank
Oct 22, 2020·Plants·Nir SadeEduardo Blumwald
Feb 11, 2021·Plants·Pasqualina ColasuonnoJose Miguel Soriano
May 1, 2021·International Journal of Molecular Sciences·Aleksandra OrzechowskaKatarzyna Wątor
Mar 29, 2021·The New Phytologist·Sohail M KarimiRosalia Deeken

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Methods Mentioned

BETA
salt treatments
salt treatment

Software Mentioned

Genstat

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