Wheat production in Bangladesh: its future in the light of global warming

Hossain, Altaf; Silva, Jaime A. Teixeira da

doi:10.1093/aobpla/pls042

Cited by 78 publications

(52 citation statements)

References 43 publications

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“…Its consumption has been increasing with changing food habit in our country. The average production of this crop in Bangladesh is low compared to other wheat growing countries because wheat is mainly grown under nonirrigated conditions during the dry winter (November to April) in Bangladesh (Hossain and Silva, 2013). Although the vast storage of soil moisture resulted from monsoon rain supports the plant growth favorably at the early stages of growth, the plant suffers from water stress at the reproductive stage when the residual soil moisture depletes (Lopez et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

Effect of Polyethylene Glycol Induced Water Stress on Germination and Seedling Growth of Wheat (<i>Triticum aestivum</i>)

et al. 2017

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The performance of twenty wheat genotypes under Polyethylene Glycol (PEG) induced water stress during germination and early seedling growth stages were tested under three levels of water potential i) Control (Tap water), ii) -2 bars and iii) -4 bar at the Crop Physiology and Ecology Laboratory of Hajee Mohammad Danesh Science and Technology University, Dinajpur during September 2014 to October 2014. Rate of germination and vigor index of all wheat genotypes were delayed with the increment of water stress induced by PEG. Shoot and root lengths and seedling dry weight of 10 days old seedlings were found to be reduced due to the increment of water stress. However, the degree of reduction of these parameters with the increment of water stress was not similar for all wheat genotypes. Stress tolerance index (STI) based on seedling dry weight indicated a wide difference in stress tolerance among the wheat genotypes. At moderate water deficit stress, BARI Gom 25, E 34, E 28 and BAW 1170 showed more stress tolerance and the wheat genotypes-Sourav, E 23 and BAW 1140 showed greater stress sensitivity than the other wheat genotypes. At higher water deficit stress, BARI Gom 25, BARI Gom 28, E 28 and BAW 1170 showed more stress tolerance and the wheat genotypes-Satabdi, Sourav, BARI Gom 26, E 23, E 38, E 24, BAW 1163, BAW 1140 and BAW 1151 showed greater stress sensitivity than the others. Considering both moderate and high water deficit stress, BARI Gom 25, E 28 and BAW 1170 were found as tolerant and Sourav, E 23 and BAW 1140 were found as water deficit stress sensitive wheat genotypes.

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Section: Introductionmentioning

confidence: 99%

Effect of Polyethylene Glycol Induced Water Stress on Germination and Seedling Growth of Wheat (<i>Triticum aestivum</i>)

et al. 2017

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“…To fulfill domestic demand of cereals, Bangladesh requires importing 3.0 million tons of wheat every year to meet the yield gap [3]. Unfavorable environmental conditions including heat stress, drought stress, and salinity are the main reasons for over 52% of the difference between current and recorded wheat production [1] and a 55% difference between average yields and yield potential [3]. To ensure future food security, the wheat production area needs expansion.…”

Section: Introductionmentioning

confidence: 99%

Polyethylene Glycol (PEG)-Treated Hydroponic Culture Reduces Length and Diameter of Root Hairs of Wheat Varieties

2015

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Abstract:Wheat is an important cereal crop worldwide that often suffers from moisture deficits at the reproductive stage. Polyethylene glycol (PEG)-treated hydroponic conditions create negative osmotic potential which is compared with moisture deficit stress. An experiment was conducted in a growth chamber to study the effects of PEG on root hair morphology and associated traits of wheat varieties. Plants of 13 wheat varieties were grown hydroponically and three different doses of PEG 6000 (w/v): 0% (control), 0.3% and 0.6% (less than −1 bar) were imposed on 60 days after sowing for 20 days' duration. A low PEG concentration was imposed to observe how initial low moisture stress might affect root hair development. PEG-treated hydroponic culture significantly decreased root hair diameter and length. Estimated surface area reduction of root hairs at the main axes of wheat plants was around nine times at the 0.6% PEG level compared to the control plants. Decrease in root hair diameter and length under PEG-induced culture decreased "potential" root surface area per unit length of main root axis. A negative association between panicle traits, length and dry weight and the main axis length of young roots indicated competition for carbon during their development. Data provides insight into how a low PEG level might alter root hair development.

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“…As well as the indirect impacts on agriculture through storms and associated flooding, changing temperatures are projected to reduce crop yields, for example, Hossain and da Silva (2013) found that climate change could potentially reduce grain yields in the region between 3 and 15 percent (by 2050) while Basak et al, (2010) found that increasing temperatures have a potential negative impact on Boro rice crop yields.…”

Section: Food Security Challengesmentioning

confidence: 99%

Food and nutrition security trends and challenges in the Ganges Brahmaputra Meghna (GBM) delta

Soesbergen

Nilsen

Burgess

et al. 2017

Elementa: Science of the Anthropocene

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The population of the Ganges Brahmaputra Meghna (GBM) delta is highly vulnerable to food insecurity and malnutrition due to the specific environmental, climatic and human development factors affecting agricultural production and fisheries. To better understand the impacts of climate and environmental change on food security and nutrition in this delta, this study combines spatially explicit data from the 2007 and 2011 Bangladesh Demographic and Health Survey (BDHS) with a standard satellite remotely sensed vegetation greenness index (Normalised Difference Vegetation Index, NDVI), used as a proxy for rice production. The strength of association between NDVI and child nutrition in this tropical mega-delta were tested, showing correlations between two widely used indicators of child malnutrition; stunting and wasting, and deviations from a 10 year mean NDVI (anomalies) for rice crop growing seasons – regarded as critical to individual children’s early lives. For children surveyed in 2007 we found that the likelihood of being stunted decreased with increased NDVI as a measure of food production. Similarly, for children surveyed in 2011, the likelihood of being wasted reduced with increased NDVI. However, regression results for stunting in 2011 and wasting in 2007 were not statistically significant. Our findings suggest that NDVI can be regarded as indicative of climatic variability and periods of low food production but is only partly successful as an indicator of climate related impacts on child nutrition in the GBM delta. Furthermore, our study highlights some of the uncertainties and challenges with linking environmental indicators such as the NDVI with household survey data across spatial and temporal scales.

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Wheat production in Bangladesh: its future in the light of global warming

Abstract: Global warming has already seen a radical change in temperature regimes in Bangladesh. This review provides the first up-to-date perspective and detailed analysis of wheat research in Bangladesh and the impact that global warming will have on its agriculture, especially wheat farming.

Cited by 78 publications

References 43 publications

Effect of Polyethylene Glycol Induced Water Stress on Germination and Seedling Growth of Wheat (<i>Triticum aestivum</i>)

Effect of Polyethylene Glycol Induced Water Stress on Germination and Seedling Growth of Wheat (<i>Triticum aestivum</i>)

Polyethylene Glycol (PEG)-Treated Hydroponic Culture Reduces Length and Diameter of Root Hairs of Wheat Varieties

Food and nutrition security trends and challenges in the Ganges Brahmaputra Meghna (GBM) delta

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