Adaptation of Barley Roots to Low Oxygen Supply and its Relation to Potassium and Sodium Uptake
AUTOR(ES)
Pitman, M. G.
RESUMO
The uptake of Na+ and K+ by barley seedlings grown on aerated or non-aerated solutions was studied. Plants growing in culture solution took up K+ with high selectivity whether the solution was aerated or not. Roots of plants grown on aerated CaSO4 and transferred to a solution of KCl and NaCl had a lower preference for K+ than roots of plants grown on non-aerated CaSO4. Both kinds of low-salt roots were much less able to discriminate between K+ and Na+ than high-salt roots grown on a culture solution. The different levels of K+ selectivity are suggested to be related to H+ release from the tissue.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=396249Documentos Relacionados
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