Autori: Monica David
Editorial: Romanian Agricultural Research, 29, p.45-52, 2012.
Osmotic adjustment is one of the important traits, potentially useful for improving plant performance under drought. We tested pollen response to osmotic stress, produced by immersion in 55% or 65% PEG 6000 solutions, without or with addition of KCl, to estimate osmotic adjustment (OA), by using quantitative measurements of projected pollen cytoplasm area, in 43 wheat cultivars. We found large differences between cultivars, both for the effect of PEG solutions without KCl addition (“intrinsic OA”) and for the effect of adding KCl to the PEG solutions (“osmolyte induced OA”). The total (overall) OA depended almost equally on the two OA components. The intrinsic and the osmolyte induced OA were not correlated, and this suggests that combining high levels of both mechanisms by breeding might allow genetic progress in drought resistance.
Cuvinte cheie: osmotic adjustment, osmolyte induced OA, intrinsic OA, wheat