Impact of water deficit intensity on durum wheat seminal roots

Adda, Ahmed; Sahnoune, Mohamed; Kaid-Harch, Meriem; Merah, Othmane

doi:10.1016/j.crvi.2005.08.002

Cited by 16 publications

(5 citation statements)

References 21 publications

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“…According to El Hafid et al (1998b), water stress at tillering stops tiller emission and reduces the growth of tillers already formed. In addition, severe water stress reduces the length and volume of seminal roots, mainly in the deeper layers of soil, reducing the available water for wheat during the second part of the growing season (Adda et al, 2005). All this leads to increased sensitivity of the wheat plants during later periods of water shortage and in reductions in the potential yield which are difficult to compensate for later by irrigation.…”

Section: Differential Sensitivity Of Wheat To Drought According To Thmentioning

confidence: 99%

Response of durum wheat varieties to water in semi-arid Algeria

Merouche¹,

Debaeke²,

Messahel³

et al. 2014

Afr. J. Agric. Res.

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Irrigation and varietal improvement are two major ways of increasing and stabilizing durum wheat (Triticum durum Desf.) production in semi-arid Mediterranean countries. A 3-year study was conducted in Khemis-Miliana (Upper Chelif, Algeria) to evaluate the yield response of six durum wheat genotypes to deficit irrigation. Grain yield in the unirrigated treatment ranged from 2.0 t.ha-1 (2008) to 2.8 t.ha-1 (2009). In rainfed conditions, the local variety Mohammed Ben Bachir (MBB) was the least productive (yield < 2.0 t.ha-1) but the most stable, being the most insensitive to early drought. Yields of Bousselem exceeded 3.0 t.ha-1 whereas Mexicali and Vitron had more variable and lower yields. Rainwater productivity (RWPg, the ratio of grain yield to precipitation) ranged from 0.5 (MBB) to 1.1 kg.m-3 for Bousselem, Chen's, and Waha, three varieties known to be drought-tolerant. Deficit irrigation (140 mm) resulted in an increase in grain yield of 0.4 to 3.2 t.ha-1 depending on weather conditions and variety, with a mean response of 1.1 t.ha-1. Irrigating between shooting and booting increased straw production by 23% and grain production by 46% on average. The most explanatory components of final yield under rainfed management were the number of ears.m-² and the number of grains per ear, while under irrigated management the number of grains per ear and the thousand grain weight were more critical for yield determination. The development of irrigation on durum wheat could help to close the gap between current and attainable grain yields in semi-arid Algeria, provided groundwater is available and the flowering period escapes desiccating hot winds. Wheat breeding should be focused on developing genotypes with stable behavior under drought but which respond well to irrigation.

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Section: Differential Sensitivity Of Wheat To Drought According To Thmentioning

confidence: 99%

Response of durum wheat varieties to water in semi-arid Algeria

Merouche¹,

Debaeke²,

Messahel³

et al. 2014

Afr. J. Agric. Res.

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“…Severe water stress markedly reduced root traits. 219 Drought affects the growth and the crop productivity of wheat…”

Section: Droughtmentioning

confidence: 99%

Research advances in major cereal crops for adaptation to abiotic stresses

Maiti

Satya

2014

GM Crops & Food

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With devastating increase in population there is a great necessity to increase crop productivity of staple crops but the productivity is greatly affected by various abiotic stress factors such as drought, salinity. An attempt has been made a brief account on abiotic stress resistance of major cereal crops viz. In spite of good successes obtained on physiological and use molecular biology, the benefits of this high cost technology are beyond the reach of developing countries. This review discusses several morphological, anatomical, physiological, biochemical and molecular mechanisms of major cereal crops related to the adaptation of these crop to abiotic stress factors. It discusses the effect of abiotic stresses on physiological processes such as flowering, grain filling and maturation and plant metabolisms viz. photosynthesis, enzyme activity, mineral nutrition, and respiration. Though significant progress has been attained on the physiological, biochemical basis of resistance to abiotic stress factors, very little progress has been achieved to increase productivity under sustainable agriculture. Therefore, there is a great necessity of inter-disciplinary research to address this issue and to evolve efficient technology and its transfer to the farmers' fields.

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“…Most of studies shows that drought tolerance were associated to several morphological, physiological and biochemical characteristics and plants responded to drought through many modifications occurring in all plant organs (El Hafid et al, 1998;Adda et al, 2005;Monneveux et al, 2006;Zerrad et al, 2008;Li et al, 2010;Megherbi et al, 2012). Among these studies, little is known about effects of drought on grain filling and its quality.…”

Section: Introductionmentioning

confidence: 99%

Contribution of Current Photosynthesis and Reserves Remobilization in Grain Filling and Its Composition of Durum Wheat Under Different Water Regimes

Bouzid¹,

Arous²,

Felouah³

et al. 2020

Acta Univ. Agric. Silvic. Mendelianae Brun.

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In Algeria, drought affects grain weight and modified its biochemical composition. The present study was conducted to evaluate the effect of two water supplies (100% FC, 30% FC) on grain weight and composition of five genotypes of durum wheat (Triticum durum Desf.). We also examined the effects of shading of peduncle, spike and the entire plant and excision of awns, flag leaves and foliar system on grain weight, starch and amylose/amylopectin ratio. From this study, we found that grain weight was significantly reduced by the application of water deficit. However, this action is greatly related to genotype type. It is admitted that this trait is strongly conditioned by the grain filling process. The morphological characteristics of plants were implicated to grain weight elaboration. Among organs studied, the photosynthetic rate of spick and reserves remobilization from stem announced determinant in grain filling. We found also that starch content which is associated to amylose/amylopectin ratio is strongly related to grain weigh. Finally, grains weight variations were associated to starch content and mainly related to the water supply condition.

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Impact of water deficit intensity on durum wheat seminal roots

Cited by 16 publications

References 21 publications

Response of durum wheat varieties to water in semi-arid Algeria

Response of durum wheat varieties to water in semi-arid Algeria

Research advances in major cereal crops for adaptation to abiotic stresses

Contribution of Current Photosynthesis and Reserves Remobilization in Grain Filling and Its Composition of Durum Wheat Under Different Water Regimes

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