Food crops face rising temperatures: An overview of responses, adaptive mechanisms, and approaches to improve heat tolerance

Kaushal, Naveen; Bhandari, Kalpna; Siddique, Kadambot H. M.; Nayyar, Harsh

doi:10.1080/23311932.2015.1134380

Cited by 139 publications

(136 citation statements)

References 335 publications

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“…Heat‐tolerant plants have the ability to preserve high stomatal conductance at high temperature inducing transpirational heat dissipation (Kaushal et al., ). At high temperature (40/24°C), both quinoa genotypes exhibited high stomatal conductance (Figure b), similar to the results reported in “Titicaca” and “Achachino” quinoa cultivars (Becker et al., ; Yang et al., ) and a heat‐tolerant group of tomatoes (Zhou et al., ).…”

Section: Discussionmentioning

confidence: 99%

Effect of high temperature on pollen morphology, plant growth and seed yield in quinoa (Chenopodium quinoa Willd.)

Hinojosa

Matanguihan

Murphy

2018

J Agronomy Crop Science

108

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Quinoa (Chenopodium quinoa Willd.) has gained considerable attention worldwide during the past decade due to its nutritional and health benefits. However, its susceptibility to high temperatures has been reported as a serious obstacle to its global production. The objective of this study was to evaluate quinoa growth and pollen morphology in response to high temperatures. Pollen morphology and viability, plant growth and seed set, and several physiological parameters were measured at anthesis in two genotypes of quinoa subjected to day/night temperatures of 22/16°C as a control treatment and 40/24°C as the heat stress treatment. Our results showed that heat stress reduced the pollen viability between 30% and 70%. Although no visible morphological differences were observed on the surface of the pollen between the heat‐stressed and non‐heat‐stressed treatments, the pollen wall (intine and extine) thickness increased due to heat stress. High temperature did not affect seed yield, seed size and leaf greenness. On the other hand, high temperature improved the rate of photosynthesis. We found that quinoa has a high plasticity in response to high temperature, though pollen viability and pollen wall structure were affected by high temperatures in anthesis stage. This study is also the first report of quinoa pollen being trinucleate.

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Section: Discussionmentioning

confidence: 99%

Effect of high temperature on pollen morphology, plant growth and seed yield in quinoa (Chenopodium quinoa Willd.)

Hinojosa

Matanguihan

Murphy

2018

J Agronomy Crop Science

108

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“…According to Kaushal et al (2016), heat stress has harmful effects on plants, affecting growth, development, metabolism, and yield. Exposure to high temperatures causes a series of morphoanatomical, physiological, and biochemical changes, reducing the life cycle, increasing senescence, and severely affecting yield.…”

Section: Resultsmentioning

confidence: 99%

Effect of heat stress on common bean under natural growing conditions in three locations in different climate zones in the state of So Paulo, Brazil

Silva¹,

Reis²,

Gonçalves³

et al. 2018

J. Plant Breed. Crop Sci.

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Common bean (Phaseolus vulgaris L.) originated in medium to high altitude regions and is sensitive to high temperatures. Climate changes from an increase in global temperatures are foreseen, and therefore better understanding of the mechanisms of heat tolerance is necessary. In this context, the aim of this study was to investigate the effects of heat stress on twelve common bean genotypes under natural growing conditions in three locations (Campinas, Votuporanga, and Ribeirão Preto, SP, Brazil) and in two growing seasons (fall-winter 2016 and summer 2016/2017). Data were analyzed by combined analysis of variance in a 2 × 3 × 12 factorial arrangement, considering two crop seasons, three locations, and twelve genotypes as factors. This was followed by the Scott-Knott mean comparison test (P<0.05), genetics, genetics×environment (GGE)-biplot analysis for grain yield and Pearson correlation for the summer season. Significant differences were found for the crop season, location, and genotype for most of the traits evaluated. It was found that the high temperatures, reached in summer, negatively affected the performance of cultivars, resulting in a reduction of 40% in grain yield. Votuporanga, which reached the highest temperatures during the summer, was considered as the most unfavorable environment. The genotypes that proved to be more productive in the summer for the locations of Campinas were BRS Agreste and FT Nobre; for Votuporanga, the genotypes Pérola and IPR Tangará; and for Ribeirão Preto, the genotypes SEA 5 and BRS Estilo. The highlighted correlations observed by the Pearson test were the highest leaf temperature reducing grain yield and, the highest relative index of chlorophyll contributed to higher productivity.

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“…Increases in temperature may cause yield declines between 2.5% and 10% across a number of agronomic species throughout the twenty-first century (Hatfield et al 2011). The unfavorable temperature may significantly affect photosynthesis, respiration, water balance, and membrane stability of leaves reported by Kaushal et al (2016). …”

Section: Introductionmentioning

confidence: 94%

Adaptive physiological and biochemical response of sugarcane genotypes to high-temperature stress

Kohila

Gomathi

2018

Ind J Plant Physiol.

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Impact of elevated temperature on physiological and biochemical changes were evaluated in 5 commercial sugarcane genotypes and 2 wild species clones at two different growth phases. The study revealed that heat stress decreased chlorophyll content, chlorophyll stability index (CSI), SPAD value, maximum quantum efficiency of PSII photochemistry (Fv/Fm ratio), leaf gas exchange parameters, relative water content (RWC), and activities of nitrate reductase (NR), sucrose-metabolizing enzymes (SPS, SS, AI, NI) in all the genotypes and species clones. In contrast, elevated temperature induced an increase in proline, total phenolics content (TP), antioxidant enzyme activities (SOD and POX), lipid peroxidation (LP), membrane injury index (MII) and soluble sugar content in all clones. Principal component analysis based on physiological heat tolerance indexes could clearly distinguish sugarcane genotypes into three heat tolerance clusters. Noteworthy in comparison to the heat-sensitive varieties, sugarcane genotype that possessed higher degrees of heat tolerance Co 99004 displayed higher chlorophyll content, CSI, antioxidant enzyme activities, NR activity, RWC, total phenols, sucrose-metabolizing enzymes, soluble sugar content and leaf gas exchange and lower level of lipid peroxidation and membrane injury index.

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Food crops face rising temperatures: An overview of responses, adaptive mechanisms, and approaches to improve heat tolerance

Cited by 139 publications

References 335 publications

Effect of high temperature on pollen morphology, plant growth and seed yield in quinoa (Chenopodium quinoa Willd.)

Effect of high temperature on pollen morphology, plant growth and seed yield in quinoa (Chenopodium quinoa Willd.)

Effect of heat stress on common bean under natural growing conditions in three locations in different climate zones in the state of So Paulo, Brazil

Adaptive physiological and biochemical response of sugarcane genotypes to high-temperature stress

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