Yield and yield components of durum wheat (Triticum durum Desf.) as influenced by water stress at various growth stages

1999 ◽  
Vol 2 (4) ◽  
pp. 1438-1440 ◽  
Author(s):  
Muhammad Iqbal ◽  
K. Ahmed . ◽  
I. Ahmad . ◽  
M. Sadiq . ◽  
M.Y. Ashraf .
Keyword(s):  
Water Stress ◽  
Durum Wheat ◽  
Yield Components ◽  
Triticum Durum ◽  
Growth Stages ◽  
Yield And Yield Components ◽  
Triticum Durum Desf

Yield and yield components of wheat subjected to water stress under rainfed conditions in Pakistan

2003 ◽  
Vol 51 (3) ◽  
pp. 315-323 ◽  
Author(s):  
R. H. Kazmi ◽  
M. Q. Khan ◽  
M. K. Abbasi
Keyword(s):  
Water Stress ◽  
Leaf Area ◽  
Yield Components ◽  
Flag Leaf ◽  
Growth Stages ◽  
Terminal Drought ◽  
Yield And Yield Components ◽  
Rainfed Conditions ◽  
Control Terminal ◽  
Stalk Length

The investigation was concerned with the effects of water stress on the yield and yield components of wheat grown under rainfed conditions in Rawalakot, Pakistan. A pot experiment was conducted with four wheat genotypes, Inqlab-91, Chakwal-97, Rawal-87 and Kohsar-95, tested against five irrigation levels with drought imposed at different growth stages including control, terminal drought, post-anthesis drought, three irrigations and pre-anthesis drought. The parameters studied were flag leaf area, ear stalk length, number of grains per spike and grain yield per pot. Flag leaf area and ear stalk length exhibited a significant reduction of 14 and 36%, respectively, when wheat was subjected to water stress. The proportional reduction in yield was 40% with three irrigations and 98% in the case of pre-anthesis drought depending upon the extent and degree of stress. Results showed that wheat could withstand and tolerate drought only up to anthesis, after which water stress resulted in the complete failure of the crop. It could be deduced that the critical stage for moisture in wheat started 60 days after germination, and became more severe at 90 days, i.e. at the anthesis stage. Among the genotypes, Inqlab-91 was found to be more tolerant of drought and could thus be a good option for further testing and recommendation for rainfed areas.

Irrigation effects on quality characteristics of durum wheat

2003 ◽  
Vol 83 (2) ◽  
pp. 327-331 ◽  
Author(s):  
M. Güler
Keyword(s):  
Water Stress ◽  
Durum Wheat ◽  
Grain Filling ◽  
Quality Characteristics ◽  
Kernel Weight ◽  
Growth Stages ◽  
Key Words Wheat ◽  
Triticum Durum Desf ◽  
Irrigation Effects

Water stress can affect the quality characteristics of durum wheat (Triticum durum Desf.). The responses of three cultivars of durum wheat to four irrigation regimes [no irrigation or irrigation applied at three growth stages (sowing, jointing, and anthesis)] were evaluated at Ankara, Turkey, from 1993 to 1995. Thousand-kernel weight and test weight increased with irrigation at all three stages, whereas irrigation at sowing and jointing resulted in high pigmentation and protein values. When irrigation was applied at sowing and jointing, but not at anthesis, with water stress occurring only at grain filling, the quality of the grain was positively affected. Key words: Wheat, durum, stress, water quality, grain, irrigation

scholarly journals Growth And Yield Components Of Wheat Under Water Stress Of Different Growth Stages

1970 ◽  
Vol 36 (3) ◽  
pp. 455-468 ◽  
Author(s):  
M Akram
Keyword(s):  
Triticum Aestivum ◽  
Water Stress ◽  
Yield Components ◽  
Growth And Yield ◽  
Growth Stages ◽  
Wheat Cultivars ◽  
Yield And Yield Components ◽  
Relative Water ◽  
Different Growth Stages ◽  
Water Contents

A field experiment was conducted to determine the sensitivity of wheat to water stress and changes in water relations and yield of wheat (Triticum aestivum L.) under water stress conditions applied at different growth stages. The experiment comprised of two wheat cultivars and four water stress treatments, maintained by withholding water at tillering, anthesis, and at both stages. Water stress caused reduction in leaf relative water contents, water potential, osmotic potential, turgor potential, growth and yield components of both the wheat cultivars. The results indicated that high value of relative water contents were associated with increased yield and yield components. Consecutive stresses at both growth stages caused severe reduction in yield and yield components in both cultivars of wheat. Keywords: Water stress; water relations; growth; Triticum aestivum; yield components. DOI: http://dx.doi.org/10.3329/bjar.v36i3.9264 BJAR 2011; 36(3): 455-468

Physiological attributes associated with early-season drought resistance in spring durum wheat cultivars

1998 ◽  
Vol 78 (2) ◽  
pp. 227-237 ◽  
Author(s):  
R. El Hafid ◽  
Dan H. Smith ◽  
M. Karrou ◽  
K. Samir
Keyword(s):  
Water Stress ◽  
Drought Stress ◽  
Durum Wheat ◽  
Drought Resistance ◽  
Triticum Durum ◽  
Dry Matter ◽  
Wheat Cultivars ◽  
Early Season ◽  
Physiological Attributes ◽  
Triticum Durum Desf

One of the common features of the Mediterranean climate in North Africa is the uncertainty of rainfall immediately after wheat (Triticum durum Desf) emerges. Relatively little work has been done to compare the drought resistance of spring durum wheat cultivars under early-season drought stress. There is a limited insight into the physiological basis of spring durum wheat drought resistance in rainfed Mediterranean regions. Field experiments were conducted in 1995 and 1996 growing seasons, and a greenhouse experiment was conducted in 1996 to examine differences in some physiological characters among six spring durum wheat cultivars in response to different durations of early-season drought, and rewatering; and to determine the relationships of these characters to drought resistance. Six spring durum wheat cultivars were evaluated under four water regimes. Water regime treatments were: a well-irrigated treatment; and three water deficit treatments imposed during the period from emergence through either the onset of tillering, mid-tillering or the end of tillering. Cultivars differed widely in their response to early season water stress. Under drought stress conditions, grain yield, aboveground dry matter yield, water use efficiency for the grain (WUEg) and for the total dry matter (WUEdm) were strongly positively associated with net CO2 uptake:transpiration ratio (A/E), and osmoregulation capacity. It is concluded that drought-induced changes in A, A/E, stomatal resistance, and osmotic adjustment are possible key control points in determining the drought-resistance of a cultivar. Furthermore, there is a substantial degree of intraspecific variation for the above mentioned physiological attributes to explore as a selection tool. Selection for high osmoregulation capacity and high A/E ratio would seem to be a justifiable means of improving total dry matter and grain yield under conditions of early-season water stress. Key words: Wheat, Triticum durum Desf., physiological attributes, early-season drought

scholarly journals Comparative study of proline accumulation of Some varieties of Durum Wheat (Triticum durum Desf.) under water Stress Conditions.

2016 ◽  
Vol 73 (2) ◽  
pp. 306 ◽  
Author(s):  
Yasmina Semiani ◽  
Marie Stella Bradea ◽  
Abdelkader Benbelkacem ◽  
Mohammed Semian
Keyword(s):  
Water Stress ◽  
Durum Wheat ◽  
Triticum Durum ◽  
Turgor Pressure ◽  
Proline Accumulation ◽  
Stress Conditions ◽  
Research Station ◽  
Abiotic Constraints ◽  
Triticum Durum Desf ◽  
Plot Design

Proline accumulation, as a marker of resistance to the abiotic constraints, was evaluated on seventeen genotypes of Durum wheat (Triticum Durum Desf) under water stress conditions. An experiment was implemented at INRAA research station located at Baraki, Algiers. The experimental design adopted is that of split plot design with water regime (irrigated and non irrigated treatments) as main plots and varieties as sub plots and three repetitions. Proline accumulation was significantly increased under water stress (p<0.01). There was differences between varieties and their interaction with water regimes (p<0.001) and 04 groups were identified. When plants are subjected to water stress they increase their rate of proline, this enables to improve the capacity of the cell to maintain it turgor pressure at low water potential. Key words: Durum wheat (Triticum durum Desf.), Proline accumulation, resistance, water stress.

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