Physiological Responses of Spring Durum Wheat Cultivars to Early-season Drought in a Mediterranean Environment

Hafid, R. El; Smith, Dan H.; Karrou, Mohammed; Samir, Karima

doi:10.1006/anbo.1997.0567

Cited by 75 publications

(42 citation statements)

References 29 publications

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“…Therefore, it may be suggested that H. mucronatum may have a better ability to regulate intracellular water relations through biomass accumulation than C. ciliaris under drought stress conditions. It is well documented that decline in RWC is related to cell membrane properties and its adaptability to environmental changes such as drought (Katerji et al 1997, El Hafi d et al 1998, De Pereira-Neto et al 1999, Liu et al 2002, Molnar et al 2002, Blokhina et al 2003. However, spatial differences among the species cannot be ruled out as water relation characteristics refl ect the physiological differences among species and cultivars.…”

Section: Discussionmentioning

confidence: 99%

Physiological responses of two halophytic grass species under drought stress environment

Siddiqui¹,

Shahid²,

Cho³

et al. 2016

Acta Botanica Croatica

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-The physiological responses of two halophytic grass species, Halopyrum mucronatum (L.) Staph. and Cenchrus ciliaris (L.), under drought stress were evaluated. Biomass accumulation, relative water content, free proline, H 2 O 2 content, stomatal conductance, photosynthetic performance and quantum yield (F v /F m ratio) were studied. Under drought conditions, these halophytic plants expressed differential responses to water defi cit. Stomatal conductance and free proline content were higher in H. mucronatum than in C. ciliaris, while H 2 O 2 content in H. mucronatum was substantially lower than in C. ciliaris. Performance index showed considerable sensitivity to a water defi cit condition, more so in C. ciliaris than in H. mucronatum. Results were discussed in relation to comparative physiological performance and antioxidant enzymes activity of both halophytic grasses under drought stress.

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Section: Discussionmentioning

confidence: 99%

Physiological responses of two halophytic grass species under drought stress environment

Siddiqui¹,

Shahid²,

Cho³

et al. 2016

Acta Botanica Croatica

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“…Lower performance of durum wheat compared to bread wheat (Fig. 1A) under similar osmotic adjustment (OA) (Morgan et al, 1986) could be due to the unrecovered low CO2 exchange rate and water loss rate in previously droughted plants, resulting from persistent abscisic acid production in durum wheat (El Hafid et al, 1998). A long history of domestication and hybridization in wheat might further explain variation within the same genera since genome-wide diversity between wild and domesticated species has indicated that wheat and durum wheat have lost 69% and 84%, respectively of their nucleotide diversity (Haudry et al, 2007).…”

Section: Crop Species Variationmentioning

confidence: 99%

“…Early termination of rainy season in the lowland rain-fed areas of the Mekong region of Cambodia and Laos negatively affected the productivity of rice genotypes that flowered late and required a longer growing period (Tsubo et al, 2009). In the Mediterranean climate of North Africa, erratic and inadequate rainfall significantly depressed the important durum wheat production (El Hafid et al, 1998). The yield of food legumes grown in arid to semiarid environments or drylands such as the Mediterranean (e.g., faba beans, chickpea and lentil), was usually variable or low due to terminal droughts that characterize these areas (Karou and Oweis, 2012;Mafakheri et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Global synthesis of drought effects on cereal, legume, tuber and root crops production: A review

Daryanto

Wang

Jacinthe

2017

Agricultural Water Management

278

144

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As a result of climate change, drought is predicted to pose greater pressure on food production system than in the past. At the same time, crop yield co-varies with both environmental (e.g., water, temperature, aridity) and agronomic variables (i.e., crop species, soil texture, phenological phase).To improve our quantitative understanding on the effect of these co-varying factors on agricultural productivity, we synthesized previous meta-analysis studies summarizing the results of numerous independent field experiments on drought and its effect on the production of cereal, legume, root and/or tuber (root/tuber) crops. We also included new crops species that were not covered in previous meta-analyses and the effects of heat stress. Our results indicated that cereals tended to be more drought resistant than legumes and root/tubers. Most crops were more sensitive to drought during their reproductive (i.e., grains filling, tuber initiation) than during their vegetative phase, except for wheat, which was also sensitive during vegetative phase. Recovery from drought impact at reproductive phase was either: (i) unfeasible for crops experiencing damage to their reproductive organs (e.g., maize, rice) or (ii) limited for root/tuber crops, provided that water was abundant during the subsequent root/tuber bulking period. Across soil texture, the variability of yield reduction for cereals was also lower in comparison to legume or root/tuber crops, probably due to the extensive and deep rooting system of cereal crops. As crop species, plant phenology, and soil texture were important co-varying factors in determining drought-induced crop yield reduction, no single approach would be sufficient to improve crop performance during drought. Consequently, a combination of approaches, particularly site-specific management practices that consider soil conditions (i.e., intercropping, mulching, and crop rotation) and selection of crop varieties adjusted to the local climate should be adopted in order to improve the sustainability of agricultural production in a changing climate.3

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“…Drought stress may appear at different developmental stages, as a lack of water can occur pre-flowering, during grain-filling, or continuously [6]. Already in the juvenile stages, from sowing to tillering, drought can severely influence yield development [7]. At all stages, plants try to maintain water content in leaves in order to avoid drought stress [8,9], e.g., by stomatal closure, which, like most of the drought stress response mechanisms, is regulated by the phytohormone abscisic acid (ABA) [2,10].…”

Section: Introductionmentioning

confidence: 99%

QTL for Water Use Related Traits in Juvenile Barley

2016

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Water use efficiency (WUE) is a trait of prime interest in cases of drought stress because it provides information on biomass production in limited water conditions. In order to get information on WUE and additional water use related traits, i.e., dry weight (DW), fresh weight (FW), total leaf water (LW) and leaf water content (WC), greenhouse pot experiments were conducted on 156 barley genotypes (Hordeum vulgare L.) for control (70% maximal water capacity of soil) and drought stress conditions (20% of the maximal water capacity of soil). Significant correlations between WUE and the other water use related traits (r ≤ 0.65) were determined in juvenile barley, and genotypes suited for improving drought stress tolerance in early developmental stages were identified. Furthermore, based on the significant effects of genotypes and treatments, as well as their interaction, data were used for genome wide association studies (GWAS) resulting in the identification of 14 marker trait associations (MTAs) corresponding to four quantitative trait loci (QTL). For WUE, four MTAs were detected mostly located on barley chromosome 4H. For four MTAs, functional annotations related to the involvement in response to abiotic stress were found. These markers may be of special interest for breeding purposes in cases when they will be validated and also detected in later growth stages.

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Physiological Responses of Spring Durum Wheat Cultivars to Early-season Drought in a Mediterranean Environment

Cited by 75 publications

References 29 publications

Physiological responses of two halophytic grass species under drought stress environment

Physiological responses of two halophytic grass species under drought stress environment

Global synthesis of drought effects on cereal, legume, tuber and root crops production: A review

QTL for Water Use Related Traits in Juvenile Barley

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