High temperature stress.

Djanaguiraman, M.; Prasad, Priyanka; Jackson, Mike; Ford‐Lloyd, B. V.; Parry, M. A. J.

doi:10.1079/9781780641973.0201

Cited by 9 publications

(4 citation statements)

References 107 publications

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“…The adverse effects of short episodes of HT stress on yield of finger millet could be explained by a decrease in seed numbers and seed weight. Decreased seed numbers are generally attributed to decreased percent seed set caused by injury to microsporogenesis (pollen development) and mega‐sporogenesis (ovule development) process under HT stress (Cross, McKay, McHughens, & Bonham‐Smith, ; Prasad, Craufurd, Kakani, & Boote, ; Prasad, Pisipati, Mutava et al., ; Young, Wilen, & Bonham‐Smith, ; Djanaguiraman and Prasad, ). According to Jain et al.…”

Section: Discussionmentioning

confidence: 99%

Thresholds, sensitive stages and genetic variability of finger millet to high temperature stress

Opole

Prasad

Djanaguiraman

et al. 2018

J Agronomy Crop Science

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Finger millet [Eleusine coracana (L.) Gaertn.] is an important coarse cereal crop grown in the arid and semi‐arid regions and often experiences high temperature (HT) stress. The objectives of this research were (i) to quantify effects of season‐long HT stress on physiological and yield traits, (ii) to identify the developmental stages most sensitive to HT stress and (iii) to quantify the genetic variability for HT stress tolerance in finger millet. Research was conducted in controlled environment conditions. HT stress decreased the chlorophyll index, photosystem II activity, grain yield and harvest index. Maximum decrease in number of seeds per panicle and grain yield per plant was observed when stress was imposed during booting, panicle emergence or flowering stages. Maximum genotypic variation was explained by panicle width and number of seeds per panicle at optimum temperature (OT) and grain yield per plant at HT and number of seeds at HT. Based on the stress response and grain yield, tolerant or susceptible genotypes were identified. Finger millet is sensitive to HT stress during reproductive stages, and there was genotypic variability among the finger millet genotypes for number of seeds per panicle and grain yield under HT, which can be exploited to enhance stress tolerance.

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Section: Discussionmentioning

confidence: 99%

Thresholds, sensitive stages and genetic variability of finger millet to high temperature stress

Opole

Prasad

Djanaguiraman

et al. 2018

J Agronomy Crop Science

Self Cite

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“…Thus, it is important to target them separately as the traits that lead to tolerance in one may differ from the other. For instance, traits related with the root architecture ( Singh et al, 2010 ) or the stay green ( Borrell et al, 2014 ), will impact mainly the drought tolerance, whereas pollen viability and seed-set percentage under heat stress ( Nguyen et al, 2013 ) or higher cardinal temperatures ( Djanaguiraman and Prasad, 2014 ) will have a bigger impact on heat-stress tolerance. Therefore, the candidate germplasm tested and the selection criteria will also differ upon different evaluating conditions (i.e., eastern KS environments will benefit more broadly from adapted genotypes while western KS environments will favor germplasm adapted to grain filling water-stress tolerance).…”

Section: Discussionmentioning

confidence: 99%

Environment Characterization in Sorghum (Sorghum bicolor L.) by Modeling Water-Deficit and Heat Patterns in the Great Plains Region, United States

et al. 2022

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Environmental characterization for defining the target population of environments (TPE) is critical to improve the efficiency of breeding programs in crops, such as sorghum (Sorghum bicolor L.). The aim of this study was to characterize the spatial and temporal variation for a TPE for sorghum within the United States. APSIM-sorghum, included in the Agricultural Production Systems sIMulator software platform, was used to quantify water-deficit and heat patterns for 15 sites in the sorghum belt. Historical weather data (∼35 years) was used to identify water (WSP) and heat (HSP) stress patterns to develop water–heat clusters. Four WSPs were identified with large differences in the timing of onset, intensity, and duration of the stress. In the western region of Kansas, Oklahoma, and Texas, the most frequent WSP (∼35%) was stress during grain filling with late recovery. For northeast Kansas, WSP frequencies were more evenly distributed, suggesting large temporal variation. Three HSPs were defined, with the low HSP being most frequent (∼68%). Field data from Kansas State University sorghum hybrid yield performance trials (2006–2013 period, 6 hybrids, 10 sites, 46 site × year combinations) were classified into the previously defined WSP and HSP clusters. As the intensity of the environmental stress increased, there was a clear reduction on grain yield. Both simulated and observed yield data showed similar yield trends when the level of heat or water stressed increased. Field yield data clearly separated contrasting clusters for both water and heat patterns (with vs. without stress). Thus, the patterns were regrouped into four categories, which account for the observed genotype by environment interaction (GxE) and can be applied in a breeding program. A better definition of TPE to improve predictability of GxE could accelerate genetic gains and help bridge the gap between breeders, agronomists, and farmers.

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“…Climate change and variability highlight the need to explore genetic variability and new sources of tolerance more quickly, as well as harness all present genetic resources, identify new resources, and protect them for the future [51]. The reintegration of trees and farming systems through a broad set of methods known as agroforestry has the potential to mitigate these environmental effects, at least in part [107].…”

Section: Discussionmentioning

confidence: 99%

“…High-temperature stress is one of the major environmental factors limiting the productivity of grain crops and agroforestry in general. Grain yield is decreased by temperature stress, which impacts various physiological, growth, and yield processes [51]. High temperature is most often accompanied by decreasing water availability, thus the combined effect of both heat and drought on the yield of many crops is stronger than the effects of each stress alone [52].…”

Section: Temperature Stress Consequencesmentioning

confidence: 99%

Conceptualizing Multiple Stressors and Their Consequences in Agroforestry Systems

et al. 2022

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The natural environment of crops is exposed to a complex collection of biotic and abiotic pressures. Abiotic stresses cover a diversity of environmental elements that cannot be avoided, such as temperature, drought, salinity, cold, heat, light, and water stress. Biotic stress is caused by living organisms with which plants coexist and interact. Pathogens and herbivores are examples of biotic stressors that can threaten food security and result in significant economic losses. Agricultural production systems differ in the extent of stress towards cultivated crops; agroforestry is considered to provide a protective function against environmental stress. The concept of this review was to assess the impact of environmental change and the atmospheric variability on the plants in agroforestry systems. The application of trees in field crop production has become more and more involved in practice, especially in areas with an extreme climate and unfavorable soil conditions. The main reasons for the rising interest are the effects of climate change, soil degradation, and erosion. Most of the trees are used as hedgerows or farm boundaries, or as scattered planting on the farm to control soil erosion as well as to improve farm productivity, which requires a thorough understanding of each stress element.

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High temperature stress.

Cited by 9 publications

References 107 publications

Thresholds, sensitive stages and genetic variability of finger millet to high temperature stress

Thresholds, sensitive stages and genetic variability of finger millet to high temperature stress

Environment Characterization in Sorghum (Sorghum bicolor L.) by Modeling Water-Deficit and Heat Patterns in the Great Plains Region, United States

Conceptualizing Multiple Stressors and Their Consequences in Agroforestry Systems

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