Effect of High Air Temperature on Grain Growth and Yields of Wheat Genotypes Differing in Heat Tolerance

Rahman, M. A.; Chikushi, Jiro; Yoshida, Satoshi; Yahata, Hisashi; Yasunaga, Eriko

doi:10.2480/agrmet.605

Cited by 22 publications

(14 citation statements)

References 18 publications

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“…As higher temperature shortened plant maturation causing reduction in grain growth duration (Rahman et al, 2005) which ultimately resulted in smaller grains. Among different hybrids, YH-1898 produced maximum grain weight (385.00 g) against the minimum (311.00 g) for maize hybrid AGB5800.…”

Section: Resultsmentioning

confidence: 99%

Evaluation of Maize Hybrids for Tolerance to High Temperature Stress in Central Punjab

Rahman¹,

Arif²,

Hussain³

et al. 2013

AJBEBT

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Each genotype has an optimum range of temperature for growth and development, when the temperature increases beyond this critical limit, it generates temperature stress which affects its performance adversely. The aim of the study was evaluate the variation exists among genotypes regarding heat stress, 25 maize hybrids were tested at Maize and Millets Research Institute, Yusafwala-Sahiwal, Pakistan. The studies were focused on screening for heat tolerant maize hybrids that are adaptable in agro-climatic conditions of Pakistan. Results indicate that the all the maize hybrids were significantly affected by high temperature stress. Maize hybrids YH-1898, KJ. Surabhi, FH-793 ND-6339 and NK -64017 showed reasonable tolerance against high temperature and they produced higher grain yield per unit area as compared to other maize hybrids.

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Section: Resultsmentioning

confidence: 99%

Evaluation of Maize Hybrids for Tolerance to High Temperature Stress in Central Punjab

Rahman¹,

Arif²,

Hussain³

et al. 2013

AJBEBT

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“…Late planted wheat decreased the photosynthetic rate that was associated with higher evapotranspiration (Valipour 2015b) and stomatal conductance (Takahashi and Nakaseko 1992). Many studies described that high temperature reduced the photosynthetic rate by accelerating the leaves senescence in wheat (Guttieri et al 2001;Rahman et al 2005;Pourreza et al 2009), maize (Valentinuz and Tollenaar 2004) and rice (Hong et al 1999;Xie et al 2011).…”

Section: Discussionmentioning

confidence: 99%

Physiological response of late sown wheat to exogenous application of silicon

Sattar¹,

Cheema

Abbas³

et al. 2017

Cereal Research Communications

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Late planting of wheat in rice-wheat cropping system is perhaps one of the major factors responsible for low crop yield. The main cause of reduction in yield is due to supra-optimal conditions during the reproductive growth. High temperature during reproductive phase induces changes in water relations, decreases photosynthetic rate, and transpiration rate, stomatal conductance and antioxidative defence system. Silicon (Si), being a beneficial nutrient not only provides significant benefits to plants growth and development but may also mitigate the adversities of high temperature. A field study was conducted at Agronomic Research Area of University of Agriculture; Faisalabad, Pakistan to assess the performance of late sown wheat with the soil applied Si. Experiment was comprised of three sowing dates; 10 th Nov (normal), 10 th Dec (late), 10 th Jan (very late) with two wheat varieties (Sehar-2006 and Faisalabad-2008), and an optimized dose of Si (100 mg per kg soil), applied at different growth stages (control, crown root, booting and heading). Results indicated that 100 mg Si per kg soil at heading stage offset the negative impact of high temperature and induced heat tolerance in late sown wheat. Silicon application improved 34% relative water contents (RWC), 30% water potential, 26% osmotic potential, 23% turgor potential and 21% photosynthetic rate, and 32% transpiration rate and 20% stomatal conductance in wheat flag leaf than control treatment. Further it was observed that Si application preventing the oxidative membrane damage due to enhanced activity of antioxidant enzymes, i.e. 35% superoxide dismutase (SOD) and 38% catalase (CAT). In conclusion results of this field study demonstrated that soil applied Si (100 mg per kg soil) at heading stage enhanced all physiological attributes of wheat flag leaf. Which in turn ameliorated the adverse effects of high temperature in late sown wheat. Study depicted that Si can be used as a potential nutrient in order to mitigate the losses induced by high temperature stress.

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“…In tolerant cultivars, leaf senescence is reported to occur after significant grain growth whereas in sensitive cultivars, leaf senescence occurs before substantial grain growth. High temperature induced forced maturation caused reduction in grain growth duration (Rahman et al, 2005) that finally resulted in lower 1000-grain weight and grain yield. Though spikes/m 2 and grains/spike were not influenced by foliar treatments, only the higher 1000-grain weight contributed to higher yield in response to foliar treatments.…”

Section: Grain Yield and Yield Componentsmentioning

confidence: 99%

“…Late-sown wheat is usually exposed to high temperature during flowering to grain-filling stages of the crop due to short spell of winter in Bangladesh (Ahmed and Meisner, 1994). High temperature enhances leaf senescence and reduces green area duration that affects the production of photosynthates and thereby results in shrivels and smaller grains (Rahman et al, 2005). The yield reduction of wheat under higher temperature is associated with a less number of 68 RAHMAN et al grains/spike and smaller grain size (Gibson and Paulsen, 1999).…”

Section: Introductionmentioning

confidence: 99%

Effects of foliar application of potassium orthophosphate on grain yield and kernel quality of Wheat (Triticum aestivum) under terminal heat stress

Rahman

Hasan

Begum

et al. 2014

Bangladesh J. Agric. Res

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A field experiment was conducted at Bangladesh Agricultural Research Institute (BARI) farm, Gazipur to evaluate the effect of foliar application of potassium orthophosphate on grain yield and kernel quality of wheat under the terminal heat stress imposed by late sowing for two consecutive years (2008-09 and 2009-10). Five combinations of foliar applications of potassium orthophosphate and Tilt were tested on three wheat varieties, namely Kanchan, Shatabdi, and Prodip. The result indicated that foliar application of potassium orthophosphate was effective in increasing SPAD value (Measure of leaf chlorophyll content) and leaf area of all the wheat varieties, whereas Tilt application was effective only in Kanchan. The grain size of wheat in terms of 1000-grain weight was improved and thereby contributed to grain yield. Also the foliar application of potassium orthophosphate decreased the number of immature, smaller and deformed kernel, and thus improved the kernel quality. Two foliar sprays of 0.1% potassium orthophosphate solution at 70 DAS (Days after sowing) and 80 DAS performed better results than other applications. There were varietal differences in response to foliar treatments and the variety Prodip and Shatabdi were more responsive to potassium orthophosphate compared to Kanchan. Potassium orthophosphate could be suggested to improve grain yield and kernel quality of wheat under terminal heat stress condition.

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Effect of High Air Temperature on Grain Growth and Yields of Wheat Genotypes Differing in Heat Tolerance

Cited by 22 publications

References 18 publications

Evaluation of Maize Hybrids for Tolerance to High Temperature Stress in Central Punjab

Evaluation of Maize Hybrids for Tolerance to High Temperature Stress in Central Punjab

Physiological response of late sown wheat to exogenous application of silicon

Effects of foliar application of potassium orthophosphate on grain yield and kernel quality of Wheat (Triticum aestivum) under terminal heat stress

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