[ Effet du déficit hydrique sur certains osmolytes chez cinq variétés de blé dur (Triticum durum) ]
Volume 17, Issue 3, August 2016, Pages 757–767
Safia CHAHBAR1 and Moulay Belkhodja2
1 Laboratory of Agro-Biotechnology and Nutrition in Semi-Arid Areas, Faculty of Natural Sciences and Life, Tiaret, Algeria
2 Laboratoire de Biotoxicologie Expérimentale, Biodépollution et de Phytoremediation BTEBDPR, Faculté des Sciences, Université Es-Senia - Oran, Algeria
Original language: French
Copyright © 2016 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Water stress is the major environmental stresses that affect agricultural production worldwide, especially in arid and semi-arid regions. This research investigated the effect of water deficit on five wheat cultivars grown in the greenhouse until anthesis. Mild (60%) and severe (30%) water deficit regimes were used with a control of 100% soil field capacity. The effect of water stress on parameters was investigated including; Relative water content (RWC), pigment content (chl a, chl b, carotenoids, chl tot), proline, soluble sugars, rate of K+ and Na+ were determined. The results indicated that the effect of water deficit on biochemical parameters depended on the combination of water stress regime and wheat cultivars. The analyses carried show that under water deficit stress RWC was sharply reduced due a combination of leaf growth reduction and abscission. Water deficits impose leaf chlorophyll content decrease. In addition, wheat genotypes a more significant accumulation of solubles sugars than of proline. It results from them also a rate high from Na+ and a low rate of K+ at the time of the stress. Finally, the contribution of the physio-biochimicals parameters in the adaptation of the durum wheat depends closely on the genotypes and intensity of the hydrous deficit.
Author Keywords: durum wheat, water deficit, soluble sugar, proline, pigment content, Na+, K+.
Volume 17, Issue 3, August 2016, Pages 757–767
Safia CHAHBAR1 and Moulay Belkhodja2
1 Laboratory of Agro-Biotechnology and Nutrition in Semi-Arid Areas, Faculty of Natural Sciences and Life, Tiaret, Algeria
2 Laboratoire de Biotoxicologie Expérimentale, Biodépollution et de Phytoremediation BTEBDPR, Faculté des Sciences, Université Es-Senia - Oran, Algeria
Original language: French
Copyright © 2016 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
Water stress is the major environmental stresses that affect agricultural production worldwide, especially in arid and semi-arid regions. This research investigated the effect of water deficit on five wheat cultivars grown in the greenhouse until anthesis. Mild (60%) and severe (30%) water deficit regimes were used with a control of 100% soil field capacity. The effect of water stress on parameters was investigated including; Relative water content (RWC), pigment content (chl a, chl b, carotenoids, chl tot), proline, soluble sugars, rate of K+ and Na+ were determined. The results indicated that the effect of water deficit on biochemical parameters depended on the combination of water stress regime and wheat cultivars. The analyses carried show that under water deficit stress RWC was sharply reduced due a combination of leaf growth reduction and abscission. Water deficits impose leaf chlorophyll content decrease. In addition, wheat genotypes a more significant accumulation of solubles sugars than of proline. It results from them also a rate high from Na+ and a low rate of K+ at the time of the stress. Finally, the contribution of the physio-biochimicals parameters in the adaptation of the durum wheat depends closely on the genotypes and intensity of the hydrous deficit.
Author Keywords: durum wheat, water deficit, soluble sugar, proline, pigment content, Na+, K+.
Abstract: (french)
Le déficit hydrique est la majeure contrainte environnementale qui affecte la production agricole mondiale, spécialement dans les zones aride et semi-aride. Une expérimentation est effectuée sur cinq variétés de blé dur (Triticum durum Desf.) sous conditions contrôlées au stade floraison. Un traitement hydrique conduit à capacité au champ (100%), et deux autres traitements subissent des déficits hydriques à intensités différentes modéré (SH60%) et sévère (SH30%). L’effet du déficit hydrique est étudié sur : teneur relative en eau (RWC), pigments chlorophylliens (chl a, chl b, carotenoides et chl tot), proline, sucres solubles, taux de K+ et Na+. Les résultats montrent que la RWC représente l’une des premières caractéristiques altérées en situations d’alimentation hydriques limitantes. La teneur en chlorophylle a et b varie en s’abaissant sous le régime hydrique imposé, si bien que la chlorophylle a reste toutefois supérieure aux autres pigments. L’accumulation des teneurs en sucres solubles et en proline devient plus nette au fur et à mesure que l’intensité du stress s’accentue. Les variétés utilisées accumulent plus de Na+ que de K+ à la déclaration de la contrainte hydrique imposé. Finalement, Les résultats obtenus lors de cette étude montrent que l’effet du déficit hydrique sur les paramètres biochimiques étudiés dépend de la durée et de l’intensité du déficit hydrique imposé ainsi que les variétés étudiées.
Author Keywords: blé dur, déficit hydrique, sucres solubles, proline, pigments chlorophylliens, Na+, K+.
How to Cite this Article
Safia CHAHBAR and Moulay Belkhodja, “Water deficit effects on osmolyts traits in five durum wheat varieties (Triticum durum),” International Journal of Innovation and Applied Studies, vol. 17, no. 3, pp. 757–767, August 2016.
