The changes of leaf proteome caused by water deficit in maize (Zea mays L.): Comparison of the response of two inbred parental lines and their F1 hybrids
Abstract
Changes of leaf proteome caused by drought stress were studied in two parental inbred lines of maize and their reciprocal F1 hybrids. The response of all four genotypes to drought stress was often similar, i.e. the increase or decrease of the amount of proteins involved e.g. in photosynthesis (23 kDA polypeptide of Photosystem II OEC, fructose-bisphosphate aldolase, Rubisco activase precursor), glutathion transferase 5 or proteins with not fully known function (stress-responsive protein, In 1-2 protein).
At the same time, changes in protein composition due to stress in some cases differed between genotypes in control conditions (chaperonine 21 precursor, glutathion S-transferase GST 27, triosephosphate isomerase or HSP 26); some of these differences were amplified after the stress. In most cases, the respective protein was missing in one of the inbreds, whereas it could be found in both hybrids, which could be possibly associated with the better ability of hybrids to cope with water deficit.