scholarly journals Interactive Effects of Elevated [CO2] and Water Stress on Physiological Traits and Gene Expression during Vegetative Growth in Four Durum Wheat Genotypes

2016 ◽  
Vol 7 ◽  
Author(s):  
Susan Medina ◽  
Rubén Vicente ◽  
Amaya Amador ◽  
José Luis Araus
Keyword(s):  
Gene Expression ◽  
Water Stress ◽  
Durum Wheat ◽  
Elevated Co2 ◽  
Vegetative Growth ◽  
Interactive Effects ◽  
Physiological Traits ◽  
Wheat Genotypes

Gene expression and physiological responses to salinity and water stress of contrasting durum wheat genotypes

2015 ◽  
Vol 58 (1) ◽  
pp. 48-66 ◽  
Author(s):  
Salima Yousfi ◽  
Antonio J. Márquez ◽  
Marco Betti ◽  
José Luis Araus ◽  
Maria Dolores Serret
Keyword(s):  
Gene Expression ◽  
Water Stress ◽  
Durum Wheat ◽  
Physiological Responses ◽  
Wheat Genotypes

Harvest index combined with impaired N availability constrains the responsiveness of durum wheat to elevated CO2 concentration and terminal water stress

2014 ◽  
Vol 41 (11) ◽  
pp. 1138 ◽  
Author(s):  
Gorka Erice ◽  
Alvaro Sanz-Sáez ◽  
Amadeo Urdiain ◽  
Jose L. Araus ◽  
Juan José Irigoyen ◽  
...  
Keyword(s):  
Water Stress ◽  
Durum Wheat ◽  
Elevated Co2 ◽  
Water Availability ◽  
Harvest Index ◽  
Grain Filling ◽  
Co2 Concentration ◽  
N Availability ◽  
Elevated Co2 Concentration

Despite its relevance, few studies to date have analysed the role of harvest index (HI) in the responsiveness of wheat (Triticum spp.) to elevated CO2 concentration ([CO2]) under limited water availability. The goal of the present work was to characterise the role of HI in the physiological responsiveness of durum wheat (Triticum durum Desf.) exposed to elevated [CO2] and terminal (i.e. during grain filling) water stress. For this purpose, the performance of wheat plants with high versus low HI (cvv. Sula and Blanqueta, respectively) was assessed under elevated [CO2] (700 μmol mol–1 vs 400 μmol mol–1 CO2) and terminal water stress (imposed after ear emergence) in CO2 greenhouses. Leaf carbohydrate build-up combined with limitations in CO2 diffusion (in droughted plants) limited the responsiveness to elevated [CO2] in both cultivars. Elevated [CO2] only increased wheat yield in fully watered Sula plants, where its larger HI prevented an elevated accumulation of total nonstructural carbohydrates. It is likely that the putative shortened grain filling period in plants exposed to water stress also limited the responsiveness of plants to elevated [CO2]. In summary, our study showed that even under optimal water availability conditions, only plants with a high HI responded to elevated [CO2] with increased plant growth, and that terminal drought constrained the responsiveness of wheat plants to elevated [CO2].

scholarly journals Yield and yield traits of durum wheat (Triticum durum desf.) and bread wheat (Triticum aestivum L.) genotypes under drought stress

Genetika ◽  
2016 ◽  
Vol 48 (2) ◽  
pp. 717-727
Author(s):  
Tofig Allahverdiyev
Keyword(s):  
Water Stress ◽  
Drought Stress ◽  
Durum Wheat ◽  
Bread Wheat ◽  
Geometric Mean ◽  
Triticum Aestivum L ◽  
Tolerance Index ◽  
Yield Traits ◽  
Wheat Genotypes ◽  
Spike Number

Field experiment was conducted to study the effect of water stress on yield and yield traits of durum wheat and bread wheat genotypes. Water stress caused significant reduction in plant height (PH), peduncle length (PL), spike number/m2(SN), spike length (SL), spike width (SW), spikelets number/spike (SNS), spike mass (SM), grain number/spike (GNS), grain mass/spike (GMS), biological yield (BY), thousand kernel mass (TKM), grain yield (GY) and harvest index (HI). Wheat traits such as SN, SM, BY, TKM, GY were more vulnerable to drought stress. Positive significant correlation of GY with SN, BY and HI under rain-fed condition was found. Genotypes of durum wheat were more sensitive to drought than that bread wheat genotypes. The significant and positive correlation of GY with Stress Tolerance Index (STI), Mean Productivity (MP) and Geometric Mean Productivity (GMP) indicated that these indices were more effective in identifying high yielding, drought tolerance genotypes.

Assessment of biochemical and physiological parameters of durum wheat genotypes at the seedling stage during polyethylene glycol-induced water stress

2020 ◽  
Vol 92 (1) ◽  
pp. 81-93 ◽  
Author(s):  
Alireza Pour-Aboughadareh ◽  
Alireza Etminan ◽  
Mostafa Abdelrahman ◽  
Kadambot H. M. Siddique ◽  
Lam-Son Phan Tran
Keyword(s):  
Polyethylene Glycol ◽  
Water Stress ◽  
Durum Wheat ◽  
Physiological Parameters ◽  
Seedling Stage ◽  
Wheat Genotypes

scholarly journals Role of exogenous application of abscisic acid ABA in drought tolerance and evaluation of antioxidant activity in durum wheat genotypes

2020 ◽  
Vol 7 (2) ◽  
pp. 44-60
Author(s):  
R. Bousba ◽  
M. Rached-Kanouni ◽  
N. Benghersallah ◽  
A. Djekoune ◽  
N. Ykhlef
Keyword(s):  
Water Stress ◽  
Drought Tolerance ◽  
Durum Wheat ◽  
Potential Role ◽  
Stomatal Resistance ◽  
Wheat Genotypes ◽  
Hydroponic Experiment ◽  
Exogenous Treatment ◽  
Physiological And Biochemical

AbstractSurvival under stressful circumstance depends on the plant’s aptitude to perceive the stimulus, generate and transmit the signals, and initiate various physiological and biochemical changes. This study aims to evaluate the exogenous seed treatment by abscissic acid (ABA) in durum wheat genotypes under water stress conditions. In this investigation, a hydroponic experiment was conducted to evaluate the potential role of exogenously applied abscicic acid in improving drought tolerance in wheat. Three contrasting wheat genotypes were used in this work: Hoggar, Hedba3 and Sigus. Two levels of water stress were induced: 2h and 4h, the aim of this work was to evaluate the action of seed exogenous treatment with ABA for 8 and 16h on physiological and biochemical parameters like stomatal resistance, antioxidant enzyme activity and quantification of ABA by HPLC. The results showed that water stress caused a decrease in endogenous ABA concentration in the roots of the stressed varieties with the exception of Hedba3. Furthermore, after ABA treatment for 16h, the two genotypes Hedba 3 and Hogar showed a higher accumulation of this phytohormone, compared to Sigus variety which marks a decrease in this concentration and which can be explained by the consumption of the ABA in the defense against the ROS.

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