A morpho-physiological approach differentiates bread wheat cultivars of contrasting tolerance under cyclic water stress
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Tartalom: http://www.sciencedirect.com/science/article/pii/S0176161...
Archívum: MTA Könyvtár
Gyűjtemény: Status = Published


Type = Article
Cím:
A morpho-physiological approach differentiates bread wheat cultivars of contrasting tolerance under cyclic water stress
Létrehozó:
Jäger, Katalin
Fábián, Attila
Eitel, Gabriella
Szabó, László
Deák, Csilla
Barnabás, Beáta
Papp, István
Dátum:
2014
Téma:
QD Chemistry / kémia
QK Botany / növénytan
Tartalmi leírás:
Leaf micromorphological traits and some physiological parameters with potential relevance to drought tolerance mechanisms were investigated in four selected winter wheat varieties. Plants were subjected to two cycles of drought treatment at anthesis. Yield components con?rmed contrasting drought-sensitive and -tolerant behavior of the genotypes. Drought tolerance was associated with small ?ag leaf surfaces and less frequent occurrence of stomata. Substantial variation of leaf cuticular thickness was found among the cultivars. Thin cuticle coincided with drought sensitivity and correlated with a high rate of dark- adapted water loss from leaves. Unlike in Arabidopsis, thickening of the cuticular matrix in response to water deprivation did not occur. Water stress induced epicuticular wax crystal depositions preferentially on the abaxial leaf surfaces. According to microscopy and electrolyte leakage measurements from leaf tissues, membrane integrity was lost earlier or to a higher extent in sensitive than in tolerant genotypes. Cellular damage and a decline of relative water content of leaves in sensitive cultivars became distinctive during the second cycle of water deprivation. Our results indicate strong variation of traits with potential contribution to the complex phenotype of drought tolerance in wheat genotypes. The maintained mem- brane integrity and relative water content values during repeated water limited periods were found to correlate with drought tolerance in the selection of cultivars investigated.
Típus:
Article
PeerReviewed
Formátum:
text
Azonosító:
Jäger, Katalin and Fábián, Attila and Eitel, Gabriella and Szabó, László and Deák, Csilla and Barnabás, Beáta and Papp, István (2014) A morpho-physiological approach differentiates bread wheat cultivars of contrasting tolerance under cyclic water stress. Journal of Plant Physiology, 171 (14). pp. 1256-1266. ISSN 0176-1617
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