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Effects of water deficit on the relative water content, proline accumulation and injury of cell membranes in leaves of old and modern cultivars of winter wheat

100%

Bandurska H., Gorny A. G., Zielezinska M.

Acta Physiologiae Plantarum

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2007

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tom 29

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nr 1 Suppl.

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Genotypic variation in response to iso-osmotic and soil moisture stresses among old and modern cultivars of winter wheat

100%

Mendel M., Gorny A. G.

Journal of Applied Genetics

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1996

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tom 37

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nr 1

The study was performed to evaluate range of the genotypie variation in drought susceptibility at juvenile growth stages among 23 old and modern winter cultivars of Triticum aestivum and one old cv. of T. spelta. Response of germinated seeds to mannitol-simulated drought stress as well as that in seedling shoot and root growth, water use and leaf transpiration under varied soil moisture were measured. Considerable genotypie variation for all morpho-physiological traits was found between wheat cultivars. There were significant differences between the older and modern cultivars. The former showed usually an enhanced rooting ability and higher water requirements, while the newer indicated more efficient water use. The older cultivars were more resistant to both iso-osmotic stress and low soil moisture at the juvenile growth stage. However, no clear differences were found between the two groups of cultivars in the variation range of the drought susceptibility indices. Complex patterns of the response to drought were observed. Cultivars, which distinguished by both a lower shoot : root ratio and a stronger drought-induced stimulative root growth, tended to be more resistant. Although only moderate the relationships noticed, a consideration of the root plasticity screening in local wheat breeding appears to be justified.

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Effects of water deficit on the relative water content, proline accumulation and injury of cell membranes in leaves of old and modern cultivars of winter wheat

88%

Bandurska H., Gorny A., Zielezinska M.

Zeszyty Problemowe Postępów Nauk Rolniczych

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2008

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tom 524

Genotype-dependent variation in water stress-induced tissue dehydration (RWC), proline accumulation (PA), membrane injury (MI) and stress resistance (R) was studied among old and modern cultivars of winter wheat (Triticum aestivum L.). Twenty-day- old seedlings grown in nutrient solution were subjected to a moderate water stress (-0.75 MPa) by immersing (for 72 h) their root systems in aerated nutrient solution with the addition of polyethylene glycol (PEG 6000). Both cultivar groups tended to exhibit a different responsibility to the moderate stress. Water deficit induced reductions in the water content of leaves in five out of nine modern cultivars only and in these cultivars an increased accumulation of free proline was found. The highest, about 100-fold increase in PA was noticed in the modern cvs Emika and Finezja. The highest MI (≈ 12%) had the modern cv. Finezja. The leaf PA under stress positively correlated with MI, but both characteristics showed negative correlations with RWC. Only weak and insignificant relationships between leaf characteristics and stress resistance were observed. The results suggest that none of the individual measured physiological parameters would indirectly serve as a precise indicator for drought resistance in the studied wheat collection.

Ograniczanie wyników

1 Acta Physiologiae Plantarum

1 Journal of Applied Genetics

1 Zeszyty Problemowe Postępów Nauk Rolniczych

2 Bandurska H.

2 Gorny A. G.

2 Zielezinska M.

1 Gorny A.

1 Mendel M.

1 2008

1 2007

1 1996

Effects of water deficit on the relative water content, proline accumulation and injury of cell membranes in leaves of old and modern cultivars of winter wheat

Genotypic variation in response to iso-osmotic and soil moisture stresses among old and modern cultivars of winter wheat

Effects of water deficit on the relative water content, proline accumulation and injury of cell membranes in leaves of old and modern cultivars of winter wheat