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Field crops and the fear of heat stress—Opportunities, challenges and future directions

Published on Jan 1, 2017in Field Crops Research3.868
· DOI :10.1016/j.fcr.2016.09.024
P. V. Vara Prasad33
Estimated H-index: 33
(KSU: Kansas State University),
Raju Bheemanahalli5
Estimated H-index: 5
(KSU: Kansas State University),
S.V. Krishna Jagadish9
Estimated H-index: 9
(KSU: Kansas State University)
Sources
Abstract
The increased probability of occurrence of more intense and frequent heat stress episodes and extended warmer nights in the future are major challenges towards sustaining agricultural production. Cereals, millets and oil seed crops respond differently to increasing temperature at different growth and developmental stages but are highly susceptible to heat stress during the gametogenesis and the flowering stages. Interestingly, the duration of stress exposure induces differential responses i.e. season-long exposure to hightemperature and short episodes of heat stress coinciding with reproductive processes. Season-long high-temperature stress decreased biomass production, seed number, individual seed weight and yield of all grain crops. Short duration heat stress coinciding with either gametogenesis or anthesis leads to negative impact of seed-set, while stress exposure at post-anthesis stages decreased seed filling duration leading to decreased seed weight. Based on extensive research we have identified temperature thresholds across field crops and quantified the above changes. Impact of heat stress on pollen production, pollen viability, pollen lipid profiles, alternations in the pollen and stigmatic surface, pollen reactive oxygen species production, their membrane damage etc., differentiating contrasting cultivars across different field crops will be highlighted. In addition, considering the differential rate of increase in minimum night temperature, different physiological routes inducing yield losses under high day and high night temperature will be presented. Genetic variability across field crops in response to heat stress and more interestingly options from wild species of wheat (higher heat tolerance at flowering), rice (heat escape through early morning flowering) and their usefulness in heat stress tolerance breeding will be an interesting addition to our talk. The current progress achieved, opportunities available, unaddressed challenges and future direction of research that could help in crop improvement to sustain global food production under future hotter climates will be discussed.
  • References (72)
  • Citations (46)
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#1Wanju Shi (IRRI: International Rice Research Institute)H-Index: 7
#2Gui Xiao (IRRI: International Rice Research Institute)H-Index: 2
Last. Xinyou Yin (WUR: Wageningen University and Research Centre)H-Index: 27
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Abstract High night-time temperature (HNT) disturbs processes of both assimilate production (source) and assimilate accumulation (sink), and as a result substantially reduces yields of cereal crops. There have been reports that increasing nitrogen application can alleviate the negative impact of high-temperature stress on yield in rice ( Oryza sativa L.). However, little is known about the interactive effect of HNT and nitrogen (N) supply on rice grain yield and its underlying source-sink relati...
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#1Rajeev N. Bahuguna (IRRI: International Rice Research Institute)H-Index: 9
#2Celymar A. Solis (IRRI: International Rice Research Institute)H-Index: 2
Last. Krishna S.V. Jagadish (IRRI: International Rice Research Institute)H-Index: 20
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High night temperature (HNT) is a major constraint to sustaining global rice production under future climate. Physiological and biochemical mechanisms were elucidated for HNT-induced grain yield and quality loss in rice. Contrasting rice cultivars (N22, tolerant; Gharib, susceptible; IR64, high yielding with superior grain quality) were tested under control (23°C) and HNT (29°C) using unique field-based tents from panicle initiation till physiological maturity. HNT affected 1000 grain weight, gr...
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#1V. S. John Sunoj (KSU: Kansas State University)H-Index: 5
#2Kyle J. Shroyer (KSU: Kansas State University)H-Index: 3
Last. P. V. Vara Prasad (KSU: Kansas State University)H-Index: 33
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Abstract Global climate models predict increase in mean daily temperature to be mainly driven by rapid increase in nighttime temperature compared to daytime temperature, leading to narrowing diurnal temperature amplitude. Higher day and night temperatures induce significant negative impact on growth and development of different crops. However, limited studies have focused on quantifying impacts associated with different diurnal temperature amplitudes maintaining the same daily mean temperature. ...
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Wheat (Triticum aestivum L.) and barley (Hordeum vulgare L.) crops are exposed to warm nights during their growing seasons and this trend is unlikely to change. The aim of this work was to evaluate the effect of higher post-anthesis night temperatures on field-grown crop yield, focusing on final grain weight determination. Experiments combined: (i) two well-adapted crops with similar phenology: bread wheat and two-row malting barley, under (ii) two temperature regimes: ambient and high night tem...
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The study was carried out to assess genetic diversity among 119 lentil genotypes grown in different habitats for heat tolerance using morpho-physiological and reproductive traits and SSR markers. High-temperature stress was applied at seedling (35/33°C) and anthesis stages (35/20°C) to study the effects on morpho-physiological and reproductive traits under hydroponic condition, which was compared with non-stressed and stressed field conditions. A set of 209 alleles were identified by 35 SSR mark...
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AbstractThe rising temperatures are resulting in heat stress for various agricultural crops to limit their growth, metabolism, and leading to significant loss of yield potential worldwide. Heat stress adversely affects normal plant growth and development depending on the sensitivity of each crop species. Each crop species has its own range of temperature maxima and minima at different developmental stages beyond which all these processes get inhibited. The reproductive stage is on the whole more...
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Rice is one of the main food crops in the world. In the near future, yield is expected to be under pressure due to unfavorable climatic conditions, such as increasing temperatures. Therefore, improving rice germplasm in order to guarantee rice production under harsh environmental conditions is of top priority. Although many physiological studies have contributed to understanding heat responses during anthesis, the most heat-sensitive stage, molecular data are still largely lacking. In this study...
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Abstract Maize yield has to be increased in the next decades in order to satisfy world demand. This increase has to be achieved in a scenario of climate change particularly characterised by heat stress. Several agronomic and genetic strategies for increased tolerance to high temperatures will be necessary. Some results in other crops showed interactions between high temperature stress and nitrogen (N) availability. To the best of our knowledge, this interaction has not been tested in maize. Ther...
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