scholarly journals Genetic and Molecular Mechanisms Conferring Heat Stress Tolerance in Tomato Plants

2021 ◽  
Vol 12 ◽  
Author(s):  
Ken Hoshikawa ◽  
Dung Pham ◽  
Hiroshi Ezura ◽  
Roland Schafleitner ◽  
Kazuo Nakashima
Keyword(s):  
Heat Stress ◽  
Abiotic Stress ◽  
High Temperatures ◽  
Food Systems ◽  
Molecular Mechanisms ◽  
Plant Morphology ◽  
Paris Agreement ◽  
Growth And Yield ◽  
Extreme Weather Events ◽  
Vegetable Crops

Climate change is a major threat to global food security. Changes in climate can directly impact food systems by reducing the production and genetic diversity of crops and their wild relatives, thereby restricting future options for breeding improved varieties and reducing the ability to adapt crops to future challenges. The global surface temperature is predicted to rise by an average of 0.3°C during the next decade, and the Paris Agreement (Paris Climate Accords) aims to limit global warming to below an average of 2°C, preferably to 1.5°C compared to pre-industrial levels. Even if the goal of the Paris Agreement can be met, the predicted rise in temperatures will increase the likelihood of extreme weather events, including heatwaves, making heat stress (HS) a major global abiotic stress factor for many crops. HS can have adverse effects on plant morphology, physiology, and biochemistry during all stages of vegetative and reproductive development. In fruiting vegetables, even moderate HS reduces fruit set and yields, and high temperatures may result in poor fruit quality. In this review, we emphasize the effects of abiotic stress, especially at high temperatures, on crop plants, such as tomatoes, touching upon key processes determining plant growth and yield. Specifically, we investigated the molecular mechanisms involved in HS tolerance and the challenges of developing heat-tolerant tomato varieties. Finally, we discuss a strategy for effectively improving the heat tolerance of vegetable crops.

scholarly journals iTRAQ-Based Quantitative Proteomic Analysis of Heat Stress-Induced Mechanisms in Pepper Seedlings

2020 ◽  
Author(s):  
Jing Wang ◽  
Chengliang Liang ◽  
Sha Yang ◽  
Jingshuang Song ◽  
Xuefeng Li ◽  
...  
Keyword(s):  
Heat Stress ◽  
Stress Response ◽  
Heat Tolerance ◽  
Proteomic Analysis ◽  
Molecular Mechanisms ◽  
Negative Impact ◽  
Growth And Yield ◽  
Vegetable Crops ◽  
Heat Stress Response ◽  
Quantitative Proteomic Analysis

Abstract Background: As one of the most important vegetable crops, pepper has rich nutritional value and high economic value. Increasing heat stress due to the global warming has a negative impact on the growth and yield of pepper. Result: In the present study, we investigated the changes of phenotype, physiology, and proteome in heat-tolerant (17CL30) and heat-sensitive (05S180) pepper seedlings in response to heat stress. Phenotypic and physiological changes showed that 17CL30 had a stronger ability to resist heat stress compared with 05S180. In proteomic analysis, a total of 3,874 proteins were identified, and 1,591 proteins were considered to participate in the process of heat stress response. According to bioinformatic analysis of heat-responsive proteins, the heat tolerance of 17CL30 might be related to a higher photosynthesis, signal transduction, carbohydrate metabolism, and stress defense, compared with 05S180. Conclusion: To understand the heat stress response mechanism of pepper, an iTRAQ-based quantitative proteomic analysis was employed to identify possible heat-responsive proteins and metabolic pathways in 17CL30 and 05S180 pepper seedlings under heat stress. This study provided new insights into the molecular mechanisms involved in heat tolerance of pepper and might offer supportive reference for the breeding of new pepper variety with heat resistance.

scholarly journals Climate Resilient Vegetable Farming: A Review

2021 ◽  
pp. 55-69
Author(s):  
. Shilpa ◽  
Priyanka Bijalwan
Keyword(s):  
Climate Change ◽  
Rural Communities ◽  
Environmental Sustainability ◽  
Food Systems ◽  
Heat Waves ◽  
Adaptation Strategy ◽  
Extreme Weather Events ◽  
Vegetable Crops ◽  
Resource Base ◽  
Transformative Adaptation

Climate change is one of the global challenges faced by the mankind today with the continuously rising temperature, triggering a host of extreme weather events such as heat waves, drought, and flooding. These climate induced challenges are manifesting themselves rapidly, causing socio-economic insecurities and health challenges, particularly in marginalized communities. There is increasing evidence of indirect associations between climate change and the rise in the rates of malnutrition, poor health, hunger and starvation, as well as food and water insecurity. In addition, climate-change impacts have put an additional pressure on already stressed natural resource base, reducing the resilience of agro-ecosystems that are, in part, providing food and nutritional security in rural communities. Tackling these challenges requires a paradigm shift from the current incremental adaptation strategies towards transformative alternatives that also place an equal emphasis on human nutrition and health, as well as environmental sustainability. In the context of marginalized farming communities, a transformative adaptation strategy is defined as one that causes a disruptive, but desirable and sustainable change to the social– ecological state of the system. In the context of this paper, the inclusion of adaptable nutrient dense vegetable crops into marginalized agricultural systems and dominant food systems is considered part of transformative adaptation.

scholarly journals Antioxidant Enzymes and Heat Shock Protein Genes from Liposcelis bostrychophila Are Involved in Stress Defense upon Heat Shock

Insects ◽  
2020 ◽  
Vol 11 (12) ◽  
pp. 839
Author(s):  
Ze Qing Miao ◽  
Yan Qing Tu ◽  
Peng Yu Guo ◽  
Wang He ◽  
Tian Xing Jing ◽  
...  
Keyword(s):  
Antioxidant Enzymes ◽  
Heat Stress ◽  
Thermal Stress ◽  
Heat Shock ◽  
Oxidative Damage ◽  
High Temperatures ◽  
Defense Mechanisms ◽  
Molecular Mechanisms ◽  
Instar Nymph ◽  
Liposcelis Bostrychophila

Psocids are a new risk for global food security and safety because they are significant worldwide pests of stored products. Among these psocids, Liposcelis bostrychophila has developed high levels of resistance or tolerance to heat treatment in grain storage systems, and thus has led to investigation of molecular mechanisms underlying heat tolerance in this pest. In this study, the time-related effects of thermal stress treatments at relatively high temperatures on the activities of antioxidant enzymes, including superoxide dismutase (SOD), catalase (CAT), peroxidases (POD), glutathione-S-transferases (GST) and malondialdehyde (MDA), of L. bostrychophila were determined. Thermal stress resulted that L. bostrychophila had a significantly higher MDA concentration at 42.5 °C, which indicated that the heat stress increased lipid peroxidation (LPO) contents and oxidative stress in this psocid pest. Heat stress also resulted in significant elevation of SOD, CAT and GST activities but decreased POD activity. Our data indicates that different antioxidant enzymes contribute to defense mechanisms, counteracting oxidative damage in varying levels. POD play minor roles in scavenging deleterious LPO, while enhanced SOD, CAT and GST activities in response to thermal stress likely play a more important role against oxidative damage. Here, we firstly identified five LbHsps (four LbHsp70s and one LbHsp110) from psocids, and most of these LbHsps (except LbHsp70-1) are highly expressed at fourth instar nymph and adults, and LbHsp70-1 likely presents as a cognate form of HSP due to its non-significant changes of expression. Most LbHsp70s (except LbHsp70-4) are significantly induced at moderate high temperatures (<40 °C) and decreased at extreme high temperatures (40–45 °C), but LbHsp110-1 can be significantly induced at all high temperatures. Results of this study suggest that the LbHsp70s and LbHsp110 genes are involved in tolerance to thermal stress in L. bostrychophila, and antioxidant enzymes and heat shock proteins may be coordinately involved in the tolerance to thermal stress in psocids.

scholarly journals A Systematic View Exploring the Role of Chloroplasts in Plant Abiotic Stress Responses

2019 ◽  
Vol 2019 ◽  
pp. 1-14 ◽  
Author(s):  
Yo-Han Yoo ◽  
Woo-Jong Hong ◽  
Ki-Hong Jung
Keyword(s):  
Abiotic Stress ◽  
High Temperature ◽  
Stress Response ◽  
Temperature Stress ◽  
Stress Responses ◽  
Cellular Response ◽  
Molecular Mechanisms ◽  
Close Association ◽  
High Temperature Stress ◽  
Growth And Yield

Chloroplasts are intracellular semiautonomous organelles central to photosynthesis and are essential for plant growth and yield. The significance of the function of chloroplast-related genes in response to climate change has not been well studied in crops. In the present study, the initial focus was on genes that were predicted to be located in the chloroplast genome in rice, a model crop plant, with genes either preferentially expressed in the leaf or ubiquitously expressed in all organs. The characteristics were analyzed by Gene Ontology (GO) enrichment and MapMan functional classification tools. It was then identified that 110 GO terms (45 for leaf expression and 65 for ubiquitous expression) and 1,695 genes mapped to MapMan overviews were strongly associated with chloroplasts. In particular, the MapMan cellular response overview revealed a close association between heat stress response and chloroplast-related genes in rice. Moreover, features of these genes in response to abiotic stress were analyzed using a large-scale publicly available transcript dataset. Consequently, the expression of 215 genes was found to be upregulated in response to high temperature stress. Conversely, genes that responded to other stresses were extremely limited. In other words, chloroplast-related genes were found to affect abiotic stress response mainly through high temperature response, with little effect on response to drought and salinity stress. These results suggest that genes involved in diurnal rhythm in the leaves participate in the reaction to recognize temperature changes in the environment. Furthermore, the predicted protein–protein interaction network analysis associated with high temperature stress is expected to provide a very important basis for the study of molecular mechanisms by which chloroplasts will respond to future climate changes.

scholarly journals High temperature susceptibility of sexual reproduction in crop plants

2019 ◽  
Vol 71 (2) ◽  
pp. 555-568 ◽  
Author(s):  
Neeta Lohani ◽  
Mohan B Singh ◽  
Prem L Bhalla
Keyword(s):  
Heat Stress ◽  
High Temperature ◽  
Sexual Reproduction ◽  
Molecular Mechanisms ◽  
Current Knowledge ◽  
Male Gametophyte ◽  
Reproductive Development ◽  
Crop Productivity ◽  
Extreme Weather Events ◽  
Species Specific

Abstract Climate change-induced increases in the frequency of extreme weather events, particularly heatwaves, are a serious threat to crop productivity. The productivity of grain crops is dependent on the success of sexual reproduction, which is very sensitive to heat stress. Male gametophyte development has been identified as the most heat-vulnerable stage. This review outlines the susceptibility of the various stages of sexual reproduction in flowering plants from the time of floral transition to double fertilization. We summarize current knowledge concerning the molecular mechanisms underpinning the heat stress-induced aberrations and abnormalities at flowering, male reproductive development, female reproductive development, and fertilization. We highlight the stage-specific bottlenecks in sexual reproduction, which regulate seed set and final yields under high-temperature conditions, together with the outstanding research questions concerning genotypic and species-specific differences in thermotolerance observed in crops. This knowledge is essential for trait selection and genetic modification strategies for the development of heat-tolerant genotypes and high-temperature-resilient crops.

Temperature dependence of wheat development

2008 ◽  
Vol 56 (3) ◽  
pp. 313-320 ◽  
Author(s):  
K. Balla ◽  
O. Veisz
Keyword(s):  
Heat Stress ◽  
Abiotic Stress ◽  
High Temperatures ◽  
Substantial Reduction ◽  
Vegetation Period ◽  
Stress Factors ◽  
Wheat Varieties ◽  
Rapid Decomposition ◽  
Abiotic Stress Factors ◽  
Temperature Levels

Among the abiotic stress factors influencing the growth and productivity of wheat varieties, extremely high temperatures have the most limiting effect. In an experiment set up in the gradient chamber of the Martonvásár phytotron to test the effect of various temperatures on four winter wheat varieties and one variety of spelt, substantial differences were observed in the heat stress tolerance of the varieties. There was a considerable reduction in the number of shoots and spikes as the result of heat stress, leading to a drastic loss of grain yield. It was clear from changes in the biomass and in the grain:straw ratio that extremely high temperatures led to a substantial reduction in the ratio of grain to straw in the varieties tested. In response to high temperature the wheat plants turned yellow earlier due to the rapid decomposition of the chlorophyll content. This resulted in a considerable shortening of the vegetation period and early ripening. Reductions in the parameters tested were observed at different temperature levels for each variety, indicating considerable differences in the ability of the varieties to adapt to abiotic stress factors.

scholarly journals iTRAQ-based quantitative proteomic analysis of heat stress-induced mechanisms in pepper seedlings

PeerJ ◽  
2021 ◽  
Vol 9 ◽  
pp. e11509
Author(s):  
Jing Wang ◽  
Chengliang Liang ◽  
Sha Yang ◽  
Jingshuang Song ◽  
Xuefeng Li ◽  
...  
Keyword(s):  
Heat Stress ◽  
Stress Response ◽  
Proteomic Analysis ◽  
Negative Impact ◽  
Bioinformatic Analysis ◽  
Growth And Yield ◽  
Vegetable Crops ◽  
Ros Scavenging ◽  
Heat Stress Response ◽  
Quantitative Proteomic Analysis

Background As one of the most important vegetable crops, pepper has rich nutritional value and high economic value. Increasing heat stress due to the global warming has a negative impact on the growth and yield of pepper. Methods To understand the heat stress response mechanism of pepper, an iTRAQ-based quantitative proteomic analysis was employed to identify possible heat-responsive proteins and metabolic pathways in 17CL30 and 05S180 pepper seedlings under heat stress. Result In the present study, we investigated the changes of phenotype, physiology, and proteome in heat-tolerant (17CL30) and heat-sensitive (05S180) pepper cultivars in response to heat stress. Phenotypic and physiological changes showed that 17CL30 had a stronger ability to resist heat stress compared with 05S180. In proteomic analysis, a total of 3,874 proteins were identified, and 1,591 proteins were considered to participate in the process of heat stress response. According to bioinformatic analysis of heat-responsive proteins, the heat tolerance of 17CL30 might be related to a higher ROS scavenging, photosynthesis, signal transduction, carbohydrate metabolism, and stress defense, compared with 05S180.

Effects of duration of coverage with spunbonded polyester rowcovers on growth and yield of bell pepper (Capsicum annuum L.)

2003 ◽  
Vol 83 (2) ◽  
pp. 387-391 ◽  
Author(s):  
D. Waterer
Keyword(s):  
Capsicum Annuum ◽  
High Temperatures ◽  
Vegetative Growth ◽  
Insect Pests ◽  
Warm Season ◽  
Growing Season ◽  
Growth And Yield ◽  
Vegetable Crops ◽  
Cropping Seasons ◽  
Yield Responses

Transparent rowcovers installed at transplanting and removed as growing conditions improve are commonly employed to promote development of warm-season vegetable crops. In regions with a brief and cool growing season, short-stature warm-season crops such as peppers could potentially benefit from being kept under the rowcovers for extended periods after transplanting. This study examined the influence of duration of coverage with spunbonded polyester rowcovers on vegetative growth, fruit yields and degree of fruit maturity of bell peppers over the 1999, 2000 and 2001 cropping seasons in Saskatchewan, Canada. Eight-week-old transplants of several cultivars of pepper were covered for 6 wk or 10 wk after transplanting or for the duration of the growing season. All growth and yield responses to the duration of coverage were consistent across the cultivars tested. In 1999, extending the period of coverage reduced aboveground vegetative growth of the crop, otherwise vegetative growth was not influenced by the duration of coverage. During the relatively cool 2000 cropping season, the duration of coverage had no effect on fruit yields or the proportion of the fruit that matured to red prior to frost. By contrast, in the warmer 1999 and 2001 cropping seasons, fruit yields declined as the duration of coverage increased. Excessively high temperatures interfere with fruit set in peppers. These results suggest that the risk of exposing the crop to excessively high temperatures may be increased by extending the period of coverage into the warmer periods of the growing season. Extending the period of coverage beyond the standard 6 wk also required additional labor and occasionally exacerbated problems with weeds and insect pests. Key words: Rowcovers, microclimate, ripening, pepper, Capsicum annuum

Phenology, growth and yield are strongly influenced by heat stress in late sown mustard (Brassica spp.) varieties

2020 ◽  
Vol 52 (4) ◽  
Author(s):  
Md. Mahfuz Bazzaz ◽  
Akbar Hossain ◽  
Muhammad Farooq ◽  
Hesham Alharby ◽  
Atif Bamagoos ◽  
...  
Keyword(s):  
Heat Stress ◽  
Growth And Yield ◽  
Brassica Spp

INFLUENCE OF GREENHOUSE SHADING AND DIFFERENT NUTRIENT MANAGEMENT PRACTICES ON ALLEVIATING HEAT STRESS, IMPROVING PLANT NUTRIENTS STATUS, FLOWERING GROWTH AND YIELD OF TOMATO

2020 ◽  
Vol 51 (4) ◽  
pp. 1001-1014
Author(s):  
Sulaiman & Sadiq
Keyword(s):  
Heat Stress ◽  
Management Practices ◽  
Nutrient Management ◽  
Block Design ◽  
Nutrient Status ◽  
Growth And Yield ◽  
Reproductive Growth ◽  
Positive Effects ◽  
Nutrition Programs ◽  
The Impact

The experiment was conducted in a greenhouse during 2017 and 2018 growing seasons to evaluate the impact of the shading and various nutrition programs on mitigating heat stress, reducing the use of chemical minerals, improving the reproductive growth and yield of tomato plant. Split-plot within Randomized Complete Block Design (RCBD) with three replications was conducted in this study. Shading factor was allocated in the main plots and the nutrition programs distributed randomly in the subplots. Results indicate that shading resulted in the decrease of daytime temperature by 5.7˚C as an average for both seasons; thus a significant increasing was found in leaf contents of macro nutrients (Nitrogen, Phosphorous, and Potassium), and micro nutrients (Iron, Zinc and Boron), except the Iron content in 2018 growing season. Furthermore, shading improved significantly the reproductive growth and tomato yield. Among the plant nutrition programs, the integrated nutrient management (INM) including the application of organic substances, bio inoculum of AMF and 50% of the recommended dose of chemical fertilizers; lead to the enhancement of nutrients content, reproductive characteristics and plant yield. Generally, combination of both shading and INM showed positive effects on plants nutrient status and persisting balance on tomato flowering growth and fruits yield.

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