Grain yield in wheat as affected by short periods of high temperature, drought and their interaction during pre- and post-anthesis stages

Kaur, Vikender; Behl, R. K.

doi:10.1556/crc.38.2010.4.8

Cited by 62 publications

(34 citation statements)

References 15 publications

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“…than each stress factor had separately [35], as also found in the present work. However, while [35] reported that drought stress caused a greater reduction than heat stress, in the present work only a slight difference could be observed between the two treatments. Hassan [31], on the other hand, observed a 21% decrease in grain yield due to drought and a 26% increase after heat stress.…”

Section: Discussionsupporting

confidence: 90%

Changes in the photosynthetic efficiency of winter wheat in response to abiotic stress

et al. 2014

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Changes in the photosynthetic efficiency of winter wheat in response to abiotic stress Abbreviations:Ci -intercellular CO 2 concentration; D -drought stress; D+H -drought + heat stress; E -transpiration; Fat -Fatima 2; g s -stomatal conductance; H -heat stress; Mag -Mv Magma; PAM -pulse amplitude modulated fluorometer; Pla -Plainsman V.; P N -net assimilation rate; Φ PSII -effective quantum yield of PSII IntroductionTemperature and drought have an extremely complex effect on the intensity of photosynthesis, as they influence numerous physiological processes, which in turn exert an effect on photosynthetic activity [1]. The optimum functioning of photosynthetic processes may depend on a number of other factors, including light intensity, CO 2 concentration, the plant's water balance, and whether the plants investigated are of the C3 or C4 type. Many factors may lead to a deterioration in photosynthetic intensity if they are not satisfactory for the plant.Various studies show that photosynthesis in wheat leaves starts to decline at temperatures between 28 and 35°C [2,3]. Heat stress during the reproductive phase may cause pollen sterility, tissue dehydration and lower CO 2 assimilation [1]. High temperatures injure the processes responsible for light gathering and light energy conversion, while increasing the level of photorespiration. The light-harvesting chlorophyllprotein complex may be irreversibly severed from the reaction centre nucleus, and the water-splitting system responsible for oxygen generation may also be Keywords: Heat stress • Drought • Photosynthesis • Grain yield • Grain filling • Winter wheatAbstract: The assessment of heat and drought tolerance is of primary importance in breeding programmes designed to improve heat and drought tolerance in cereals. Three winter wheat varieties grown in controlled growth chambers were exposed to heat (H) and drought (D) stress singly and in combination (H+D). The combined effects of H and D stress were much more severe than those of individual treatments for both physiological and yield parameters during grain filling. The chlorophyll content, effective quantum yield of PSII, net assimilation rate, transpiration, stomatal conductance and intercellular CO 2 concentration were greatly reduced by H, D and their interaction. Grain yield decreased to a greater extent (48.3%) in Plainsman V, averaged over the stress treatments, than in Mv Magma (67.8%) and Fatima 2 (53.7%). The least decline was found in grain number, except in Plainsman V. Mv Magma tolerated heat stress better than Fatima 2. In terms of photosynthetic activity, Plainsman V showed better drought tolerance than Mv Magma. The results showed that changes in physiological properties during stress treatment are not always associated with changes in yield parameters, so a combination of methods may be needed to give a more precise picture of the stress tolerance of wheat varieties.

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Section: Discussionsupporting

confidence: 90%

Changes in the photosynthetic efficiency of winter wheat in response to abiotic stress

et al. 2014

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“…Water scarcity and high temperature (>30°C) at the time of grain filling is one of the major constraints in increasing productivity of wheat in tropical countries like India (Rane and Nagarajan 2004;Zhao et al 2007;Yan et al 2008;Kaur and Behl 2010). Grain filling is mainly a process of starch biosynthesis and accumulation.…”

Section: Introductionmentioning

confidence: 99%

ADP-glucose pyrophosphorylase activity in relation to yield potential of wheat: Response to independent and combined high temperature and drought stress

Kaur

Madaan

Behl

2017

Cereal Research Communications

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ADP-glucose pyrophosphorylase (AGPase) activity in the developing grains of two contrasting wheat cultivars WH730 (thermo-tolerant) and UP2565 (thermo-sensitive) was determined in relation to their allosteric effectors and grain growth. The developing grains (35 days after anthesis) were excised from the middle portion of spikes of wheat genotypes subjected to high temperature, drought and their combination at booting, post-anthesis and booting+post-anthesis. The impact of stress treatments was studied by measuring starch content and yield attributes in relation to AGPase activity. AGPase, a key enzyme for starch synthesis, is allosterically activated by 3-phosphoglyceric acid (3-PGA) and inhibited by inorganic phosphate (Pi). Sensitivity of AGPase towards individual and combined high temperature and drought has not been adequately investigated, therefore the present study analyzed AGPase activity, its sensitivity to allosteric effectors under influence of high temperature, drought in order to elucidate the relationship of AGPase with starch accumulation and grain growth. Significant difference in behavior of the enzyme and its allosteric effectors were observed between the two cultivars under high temperature and/or drought. AGPase activity was substantially decreased by high temperature, drought and was found to be positively correlated with the 3-PGA, starch accumulation and yield attributes, while negatively correlated with Pi content. The results showed that effects of high temperature and drought were additive and more severe at booting+post-anthesis stage. Such studies might help in understanding the control mechanisms associated with the pathway of starch biosynthesis and thus provide chemical means to manipulate starch content vis-à-vis grain yield under heat and drought stress.

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“…Experimental studies, in which higher temperature and drought were applied together in post-anthesis stage showed a greater reduction of: grain weight per spike, average single grain weight, number of grains per spike, thousand grain weight, shortening of grain filling period and development than each of the two factors applied separately (Kaur and Behl, 2010). Cited authors showed varietal differences in wheat response to applied factors.…”

Section: Path Analysismentioning

confidence: 93%

“…thermal and rainfall factors, influence crop plants growth and development, causing quantitative modifications of plants morphological structure, durations of developmental phases and yield-forming factors levels, which determine grain yield per spike and per plant are presented widely in literature (Gut et al, 1996;Kaur and Behl, 2010;Porter and Gawith, 1999;Barnabás et. al., 2008;Modarresi et al, 2010;Orzech et al, 2009;Rahman et al, 2009;Rajala et al, 2009;Spiertz et al, 2006;Ugarte et al, 2007;Balla et al, 2012, Golba et al, 2013, Talukder et al, 2013.…”

Section: Path Analysismentioning

confidence: 99%

Analysis of Yield and Yield Related Traits Variability of Winter Wheat (Triticum aestivum L.) Cv. Izolda and Double Haploid Lines

Mańkowski¹,

Godzina-Sawczuk²,

Czaplicki³

2015

Plant Breeding and Seed Science

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The yield-forming potential of winter wheat is determined by several factors, namely total number of shoots per plant and total number of spikelets per spike. The field experiments were conducted during three vegetation seasons at the Plant Breeding and Acclimatization Institute -National Research Institute (PBAI-NRI), located in Radzików, Poland. The objective of this study was a comparative analysis of the structural yield-forming factor levels, which determine grain yield per spike and per plant of the DH lines and standard Izolda cultivar. Results indicate that several DH lines showed some differences in tested morphological structures of plant, yield factor levels and in grain yield per spike and per plant in comparison to standard Izolda, regardless of the year. Mean grain yield per plant of DH lines was 26.5% lower in comparison to standard Izolda only in the second year of study. It was caused by a reduction of productive tillers number. Structural yield-forming potential of DH lines was used in 38% and 59% and in case of Izolda in 47% and 61% (the second and the third year of experiment, respectively). The mean grain yield per spike of DH lines was 14.8% lower than Izolda cultivar only in third year of experiment and it was caused by about 12% lower number of grains per spike. Structural yield-forming potential of DH spikes was used in 82.4%, 85.4% and 84.9% and in case of Izolda in 83.8%, 87% and 89.5% (the first, the second and the third year of experiment, respectively). The grain yield per winter wheat plant (both DH lines and standard Izolda) was significantly correlated with the number of productive tillers per plant (r = 0.80). The grain yield per winter wheat spike (both DH lines and Izolda cultivar) was significantly and highly correlated with the number of grains per spike (r = 0.96), number of fertile spikelets per spike (r = 0.87) and the spike length (r = 0.80). Variation of spike and plant structural yield-forming factors determining grain yield levels were also analyzed. Calculated total variation coefficients values of each analyzed trait during three-year long studies were different depending on plant material -DH lines or standard Izolda. Low variation coefficients values characterized following traits (traits ranked by increasing values for DH lines and standard Izolda, respectively): total spikelets number per spike (6.6 and 6.3%), spike length (11.1 and 12.6%), fertile spikelets number per spike (13.7 and 11.7%)

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Grain yield in wheat as affected by short periods of high temperature, drought and their interaction during pre- and post-anthesis stages

Cited by 62 publications

References 15 publications

Changes in the photosynthetic efficiency of winter wheat in response to abiotic stress

Changes in the photosynthetic efficiency of winter wheat in response to abiotic stress

ADP-glucose pyrophosphorylase activity in relation to yield potential of wheat: Response to independent and combined high temperature and drought stress

Analysis of Yield and Yield Related Traits Variability of Winter Wheat (Triticum aestivum L.) Cv. Izolda and Double Haploid Lines

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