Diversity in root aeration traits associated with waterlogging tolerance in the genus Hordeum

Functional Plant Biology : FPB
Alaina J GarthwaiteTimothy D Colmer

Abstract

Growth, root aerenchyma, and profiles of radial O2 loss (ROL) along adventitious roots were evaluated in 35 'wild' Hordeum accessions and cultivated barley (H. vulgare L. ssp. vulgare) when grown in stagnant nutrient solution (deoxygenated and containing 0.1% agar). When grown in stagnant solution, accessions from wetland and 'intermediate' habitats were superior, compared with accessions from non-wetland habitats, in maintaining relative growth rate, tillering, and adventitious root mass. Constitutive aerenchyma formation in adventitious roots was ≥10% in 22 accessions (cf. H. vulgare at 2%). When grown in stagnant solution, aerenchyma was ≥ 20% in the adventitious roots of 14 accessions (cf. H. vulgare at 12%). Variation among the accessions in the volume of aerenchyma formed when grown in aerated or stagnant solution was not determined by the waterlogging regime of the species' natural habitat. However, the genus Hordeum comprises four genomes and when grown in stagnant solution accessions with the X genome formed, on average, 22% aerenchyma in adventitious roots (50 mm behind apex), whereas those with the H genome averaged 19%, and those with the Y or I genomes averaged 16 and 15%, respectively. Sixteen accessions formed a ...Continue Reading

Citations

Aug 15, 2008·Annals of Botany·Al Imran MalikTimothy David Colmer
Feb 1, 2014·Functional Plant Biology : FPB·Lukasz KotulaMikio Nakazono
Apr 1, 2007·Functional Plant Biology : FPB·Jiayin PangSergey Shabala
Sep 18, 2010·Journal of Experimental Botany·Timothy David Colmer, Hank Greenway
Feb 26, 2016·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Xuechen ZhangMeixue Zhou
Jul 16, 2015·Critical Reviews in Biotechnology·Ujjal J PhukanRakesh Kumar Shukla
Aug 1, 2009·Functional Plant Biology : FPB·T D Colmer, L A C J Voesenek
May 1, 2008·Annual Review of Plant Biology·J Bailey-Serres, L A C J Voesenek
Jul 15, 2005·Journal of Experimental Botany·Alaina J GarthwaiteTimothy D Colmer
Apr 12, 2013·Plant Biology·L A C J Voesenek, R Sasidharan
Apr 1, 2017·Functional Plant Biology : FPB·Dennis KonnerupTimothy David Colmer
May 17, 2008·The New Phytologist·Timothy D Colmer, Timothy J Flowers
Mar 4, 2006·Journal of Experimental Botany·Timothy D ColmerRana Munns
Mar 6, 2010·Journal of Zhejiang University. Science. B·Da-wei XueGuo-ping Zhang

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