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

Akram, Muhammad

doi:10.3329/bjar.v36i3.9264

Cited by 100 publications

(67 citation statements)

References 10 publications

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“…I 1 had significantly higher 1000-grain weight than all other water stress treatments in both seasons. Similar effects of water stress on 1000-grain weight were also reported by Qadir et al (1999), Dencic et al (2000) and Akram (2011). Furthermore, the highest mean values of 1000-kernel weight (51.72 and 50.95 g) in the first and second seasons, respectively, were obtained when nitrogen fertilizer was divided into four equal doses.…”

Section: -Kernel Weight (G)supporting

confidence: 71%

Effect of Irrigation Levels and Nitrogen Fertilizer Splitting on the Produc-tivity and Nitrogen Use Efficiency of Two Bread Wheat Cultivars

2016

AJAS

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This work was carried out during 2012/ 2013 and 2013/ 2014 seasons in the Agronomy Department Experimental Farm, Agriculture Faculty, Assiut University to study the effect of irrigation levels and nitrogen fertilizer splitting on the productivity and nitrogen use efficiency of two bread wheat cultivars.Three experiments each season were done. Each experiment was subjected to three irrigation levels (100, 75 and 50 % of irrigation requirement). The experiment was laid out in Randomized Complete Block Design (RCBD) in split -plot arrangement with three replicates. Two treatments of nitrogen fertilizer splitting (2 and 4 times) were assigned in main -plots and the wheat cultivars (Giza-168 and Sids-1) were arranged in sub-plots. The obtained results showed that studied irrigation levels, nitrogen fertilizer splitting and cultivars had a significant effect on all studied traits in the two growing seasons. Here too, the first and second order interactions had a significant influence on most studied traits in both seasons. Moreover, the highest mean values of grain yield (28.13 and 28.02 ardab fed -1 ) and NUE (56.26 and 56.03 kg grain/kg N applied) in the first and second seasons, respectively were obtained from Sids-1 cultivar subjected to I 1 irrigation level and received nitrogen fertilizer at four splits.

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Section: -Kernel Weight (G)supporting

confidence: 71%

Effect of Irrigation Levels and Nitrogen Fertilizer Splitting on the Produc-tivity and Nitrogen Use Efficiency of Two Bread Wheat Cultivars

2016

AJAS

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“…Many studies are in line with the findings of the present study that drought at tillering stage (Hussain et al 1987), during vegetative growth (Qadir et al 1999) and at crown root plus booting stage (Qamar et al 2011) caused reduction in LAI significantly in wheat than other irrigation treatments. Akram (2011), moisture stress at different crop growth stages affected CGR differently. …”

Section: Growth Indicesmentioning

confidence: 99%

Growth and yield performance of selected wheat varieties under water deficit conditions

Zaman

Karim

Bari

et al. 2017

Bangladesh J. Sci. Res.

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Effect of water deficit stress on growth and yield of three wheat (Triticum aestivum) varieties, viz. BARI Gom 25, BARI Gom 26 and Sourav was studied. Water deficit lowered the light interception at anthesis in wheat. Under water deficit condition, the highest amount of PAR interception was recorded in BARI Gom 26. The reduction of leaf area index (LAI), crop growth rate (CGR), relative growth rate (RGR) and net assimilation rate (NAR) were less in BARI Gom 26. Water deficit conditions lowered the SPAD values in all the three wheat varieties. BARI Gom 26 showed less reduction, while BARI Gom 25 reflected the highest reduction in SPAD value under water deficit condition. Under water deficit condition the maximum number of spikelets/spike, 1000-grain weight and HI were recorded in BARI Gom 26 and the minimum in BARI Gom 25. Under both control and water deficit conditions BARI Gom 26 gave the highest grain yield, while the lowest grain yield was obtained from BARI Gom 25.

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“…Plant water status was affected under drought condition. Thus, plants grown under water deficit have low leaf Ψ w and turgor potential (Ψ p ) [7]. Therefore, the maintenance of appropriate plant water status during water deficit is essential for continued growth and this process can be achieved by stomatal regulation [8].…”

Section: Introductionmentioning

confidence: 99%

“…Multiple characteristics of vascular structure have been investigated, such as modifications of the vascular bundle number and area and alteration of xylem/ phloem ratio, which are thought to be involved in the resistance of the plant to environmental stresses [18]. Several studies have shown that xylem and/or phloem vessel diameter was reduced in Ctenanthe setosa and Triticum aestivum plants subjected to drought stress [2][3][4][5][6][7][8][9][10][11][12][13][14]. Thus, xylem with narrow vessels is physiologically better protected against cavitation [19].…”

Section: Introductionmentioning

confidence: 99%

“…Leaf tissues exposed to drought shows various responses. Thus, in many species such as, Ctenanthe setosa and Triticum aestivum, the entire lamina and mesophyll thickness were reduced under drought stress [2][3][4][5][6][7][8][9][10][11][12][13][14], while it was unaffected by water stress in salvia spendens and Glycine max [13][14][15][16]. Bussotti et al [17] found that limited soil moisture caused a major thickening of the mesophyll, especially in the leaf cuticle and spongy parenchyma of the beech plant, Fagus sylvatica.…”

Section: Introductionmentioning

confidence: 99%

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Anatomical adaptations of Astragalus gombiformis Pomel. under drought stress

et al. 2014

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The present study was designed to study the effect of drought on root, stem and leaf anatomy of Astragalus gombiformis Pomel. Several root, stem and leaf anatomical parameters (cross section diameter, cortex, root cortical cells, pith, leaf lamina and mesophyll thickness) were reduced under moderate to severe water deficit (20–30 days of withheld irrigation). The stele/cross section root ratio increased under moderate water deficit. The root’s and stems vascular systems showed reduced xylem vessel diameter and increased wall thickness under water deficit. In addition, the root xylem vessel density was increased in these drought conditions while it was unchanged in the stems. The stomata density was increased under prolonged drought conditions whereas the stomata size was untouched. The leaf vascular system showed reduced xylem and phloem tissue thickness in the main vein under moderate to severe water deficit. However, in the lamina the vascular tissue and the distance between vascular bundle were unaffected. Our findings suggest a complex network of anatomical adaptations such as a reduced vessel size with increased wall thickness, lesser cortical and mesophyll parenchyma formation and increased stomata density. These proprieties are required for the maintenance of water potential and energy storage under water stress which can improve the resistance of A. gombiformis to survive in arid areas.

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

Cited by 100 publications

References 10 publications

Effect of Irrigation Levels and Nitrogen Fertilizer Splitting on the Produc-tivity and Nitrogen Use Efficiency of Two Bread Wheat Cultivars

Effect of Irrigation Levels and Nitrogen Fertilizer Splitting on the Produc-tivity and Nitrogen Use Efficiency of Two Bread Wheat Cultivars

Growth and yield performance of selected wheat varieties under water deficit conditions

Anatomical adaptations of Astragalus gombiformis Pomel. under drought stress

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