Heat Sensing and Lipid Reprograming as a Signaling Switch for Heat Stress Responses in Wheat

2020 ◽  
Vol 61 (8) ◽  
pp. 1399-1407 ◽  
Author(s):  
Mostafa Abdelrahman ◽  
Takayoshi Ishii ◽  
Magdi El-Sayed ◽  
Lam-Son Phan Tran
Keyword(s):  
Heat Stress ◽  
Plant Species ◽  
Stress Responses ◽  
Calcium Influx ◽  
Global Climate ◽  
Wheat Yield ◽  
High Temperature Stress ◽  
Membrane Lipid ◽  
Wheat Varieties ◽  
The Impact

Abstract Temperature is an essential physical factor that affects the plant life cycle. Almost all plant species have evolved a robust signal transduction system that enables them to sense changes in the surrounding temperature, relay this message and accordingly adjust their metabolism and cellular functions to avoid heat stress-related damage. Wheat (Triticum aestivum), being a cool-season crop, is very sensitive to heat stress. Any increase in the ambient temperature, especially at the reproductive and grain-filling stages, can cause a drastic loss in wheat yield. Heat stress causes lipid peroxidation due to oxidative stress, resulting in the damage of thylakoid membranes and the disruption of their function, which ultimately decreases photosynthesis and crop yield. The cell membrane/plasma membrane plays prominent roles as an interface system that perceives and translates the changes in environmental signals into intracellular responses. Thus, membrane lipid composition is a critical factor in heat stress tolerance or susceptibility in wheat. In this review, we elucidate the possible involvement of calcium influx as an early heat stress-responsive mechanism in wheat plants. In addition, the physiological implications underlying the changes in lipid metabolism under high-temperature stress in wheat and other plant species will be discussed. In-depth knowledge about wheat lipid reprograming can help develop heat-tolerant wheat varieties and provide approaches to solve the impact of global climate change.

scholarly journals High-Temperature-Responsive Poplar lncRNAs Modulate Target Gene Expression via RNA Interference and Act as RNA Scaffolds to Enhance Heat Tolerance

2020 ◽  
Vol 21 (18) ◽  
pp. 6808
Author(s):  
Yuepeng Song ◽  
Panfei Chen ◽  
Peng Liu ◽  
Chenhao Bu ◽  
Deqiang Zhang
Keyword(s):  
High Temperature ◽  
Rna Interference ◽  
Stress Responses ◽  
Target Gene ◽  
Target Genes ◽  
Calcium Influx ◽  
High Temperature Stress ◽  
High Temperature Treatment ◽  
Ecological Stability ◽  
Temperature Responsive

High-temperature stress is a threat to plant development and survival. Long noncoding RNAs (lncRNAs) participate in plant stress responses, but their functions in the complex stress response network remain unknown. Poplar contributes to terrestrial ecological stability. In this study, we identified 204 high-temperature-responsive lncRNAs in an abiotic stress-tolerant poplar (Populus simonii) species using strand-specific RNA sequencing (ssRNA-seq). Mimicking overexpressed and repressed candidate lncRNAs in poplar was used to illuminate their regulation pattern on targets using nano sheet mediation. These lncRNAs were predicted to target 185 genes, of which 100 were cis genes and 119 were trans genes. Gene Ontology enrichment analysis showed that anatomical structure morphogenesis and response to stress and signaling were significantly enriched. Among heat-responsive LncRNAs, TCONS_00202587 binds to upstream sequences via its secondary structure and interferes with target gene transcription. TCONS_00260893 enhances calcium influx in response to high-temperature treatment by interfering with a specific variant/isoform of the target gene. Heterogeneous expression of these two lncRNA targets promoted photosynthetic protection and recovery, inhibited membrane peroxidation, and suppressed DNA damage in Arabidopsis under heat stress. These results showed that lncRNAs can regulate their target genes by acting as potential RNA scaffolds or through the RNA interference pathway.

scholarly journals Physiological Response to Short-Term Heat Stress in the Leaves of Traditional and Modern Plum (Prunus domestica L.) Cultivars

Horticulturae ◽  
2022 ◽  
Vol 8 (1) ◽  
pp. 72
Author(s):  
Marija Viljevac Vuletić ◽  
Ines Mihaljević ◽  
Vesna Tomaš ◽  
Daniela Horvat ◽  
Zvonimir Zdunić ◽  
...  
Keyword(s):  
Heat Stress ◽  
Elevated Temperature ◽  
High Temperature Stress ◽  
Guaiacol Peroxidase ◽  
Inadequate Response ◽  
Short Term ◽  
Modern Cultivar ◽  
Performance Indexes ◽  
Chlorophyll A Fluorescence Transients ◽  
The Impact

The aim of this study was to evaluate physiological responses to short-term heat stress in the leaves of traditional (Bistrica) and modern (Toptaste) plum cultivars. In this study, detached plum leaves were incubated at 25 °C (control) and 40 °C (stress). After 1 h of exposure to heat (40 °C), chlorophyll a fluorescence transients were measured, and several biochemical parameters were analyzed. Elevated temperature caused heat stress in both plum cultivars, seen as a decrease in water content (WT), but in the leaves of the cultivar Bistrica, an accumulation of proline and phenols, as well as an accumulation of photosynthetic pigments, suggest the activation of a significant response to unfavorable conditions. Conversely, in the leaves of Toptaste, a significant accumulation of malondialdehyde (MDA) and an activation of guaiacol peroxidase (GPOD), all together with a decreased soluble proteins content, indicate an inadequate response to maintaining homeostasis in the leaf metabolism. The impact of an elevated temperature on photosynthesis was significant in both plum cultivars as reflected in the decrease in performance indexes (PIABS and PItotal) and the maximum quantum yield of PSII (Fv/Fm), with significantly pronounced changes found in Toptaste. Unlike the traditional plum cultivar, Bistrica, in the modern cultivar, Toptaste, short-term heat stress increased the minimal fluorescence (F0) and absorption (ABS/RC), as well as Chl b in total chlorophylls. Additionally, the inactivation of RCs (RC/ABS) suggests that excitation energy was not trapped efficiently in the electron chain transport, which resulted in stronger dissipation (DI0/RC) and the formation of ROSs. Considering all presented results, it can be presumed that the traditional cultivar Bistrica has better tolerance to heat stress than the modern cultivar Toptaste. The cultivar, Bistrica, can be used as a basis in further plum breeding programs, as a source of tolerance for high temperature stress.

scholarly journals Geographic Distribution Shift of Invasive Plant Austroeupatorium inulifolium in the Future Climate Projection

2021 ◽  
pp. 38-47
Author(s):  
Angga Yudaputra ◽  
Izu Andry Fijridiyanto ◽  
Inggit Puji Astuti ◽  
Rizmoon Nurul Zulkarnaen ◽  
Ade Yuswandi ◽  
...  
Keyword(s):  
Climate Change ◽  
Plant Species ◽  
Geographic Distribution ◽  
Global Climate Change ◽  
Invasive Plant ◽  
Global Climate ◽  
Invasive Plant Species ◽  
The Future ◽  
The Impact ◽  
Occurrence Records

Aims: This study aims to predict the future geographic distribution shift of invasive plant species Austroeupathorium inulifolium as the impact of global climate change. Study Design: The rising temperature and precipitation change lead to the geographic distribution shift of organisms. A. inulifolium belongs to invasive plant species that often causes a substantial economic loss and ecological degradation in the invaded areas. Modelling of species distribution using the climate-based model could be used to understand the geographic distribution shift of invasive species in the future scenario under global climate change. Place and Duration of Study: Center for Plant Conservation and Botanic Gardens – LIPI and 6 months. Methodology: The total 2228 of occurrence records were derived from the Global Biodiversity Information Facility (GBIF) database. The seven climatic variables were selected from 19 variables using a pairwise correlation test (vifcor) with a threshold >0.7. The ensemble model was used by combining Random Forest (RF) and Support Vector Machine (SVM). Results: Both two models are well-performed either using AUC or TSS evaluation methods. RF and SVM have AUC >0.95, and TSS >0.8. The predicted current distribution tends to have larger distribution areas compared to observed occurrence records. The predicted future distribution seems to be shifted in several parts of North America and Europe. Conclusion: The geographic distribution of invasive plant species A. inulifolium will be shifted to the Northern part of globe in 2090. Mean temperature of driest quarter and precipitation of warmest quarter are the two most important variables that determine the distribution pattern of the A. inulifolium. The predictive distribution pattern of invasive plant A. inulifolium would be important to provide information about the impact of climate change to the geographic distribution shift of this species.

scholarly journals Identification of QTLs affecting post-anthesis heat stress responses in European bread wheat

2022 ◽  
Author(s):  
Gaëtan Touzy ◽  
Stéphane Lafarge ◽  
Elise Redondo ◽  
Vincent Lievin ◽  
Xavier Decoopman ◽  
...  
Keyword(s):  
Heat Stress ◽  
Bread Wheat ◽  
Heat Tolerance ◽  
Stress Responses ◽  
Grain Weight ◽  
High Yield ◽  
Wheat Varieties ◽  
Stay Green ◽  
A Genome ◽  
Main Effect

Abstract Key message The response of a large panel of European elite wheat varieties to post-anthesis heat stress is influenced by 17 QTL linked to grain weight or the stay-green phenotype. Abstract Heat stress is a critical abiotic stress for winter bread wheat (Triticum aestivum L.) especially at the flowering and grain filling stages, limiting its growth and productivity in Europe and elsewhere. The breeding of new high-yield and stress-tolerant wheat varieties requires improved understanding of the physiological and genetic bases of heat tolerance. To identify genomic areas associated with plant and grain characteristics under heat stress, a panel of elite European wheat varieties (N = 199) was evaluated under controlled conditions in 2016 and 2017. A split-plot design was used to test the effects of high temperature for ten days after flowering. Flowering time, leaf chlorophyll content, the number of productive spikes, grain number, grain weight and grain size were measured, and the senescence process was modeled. Using genotyping data from a 280 K SNP chip, a genome-wide association study was carried out to test the main effect of each SNP and the effect of SNP × treatment interaction. Genotype × treatment interactions were mainly observed for grain traits measured on the main shoots and tillers. We identified 10 QTLs associated with the main effect of at least one trait and seven QTLs associated with the response to post-anthesis heat stress. Of these, two main QTLs associated with the heat tolerance of thousand-kernel weight were identified on chromosomes 4B and 6B. These QTLs will be useful for breeders to improve grain yield in environments where terminal heat stress is likely to occur.

scholarly journals Compared to Australian Cultivars, European Summer Wheat (Triticum aestivum) Overreacts When Moderate Heat Stress Is Applied at the Pollen Development Stage

Agronomy ◽  
2018 ◽  
Vol 8 (7) ◽  
pp. 99 ◽  
Author(s):  
Kevin Begcy ◽  
Anna Weigert ◽  
Andrew Egesa ◽  
Thomas Dresselhaus
Keyword(s):  
Gene Expression ◽  
Heat Stress ◽  
Heat Waves ◽  
Negative Impact ◽  
Pollen Viability ◽  
Wheat Yield ◽  
Gene Expression Pattern ◽  
Type A ◽  
Transcriptional Level ◽  
The Impact

Heat stress frequently imposes a strong negative impact on vegetative and reproductive development of plants leading to severe yield losses. Wheat, a major temperate crop, is more prone to suffer from increased temperatures than most other major crops. With heat waves becoming more intense and frequent, as a consequence of global warming, a decrease in wheat yield is highly expected. Here, we examined the impact of a short-term (48 h) heat stress on wheat imposed during reproduction at the pollen mitosis stage both, at the physiological and molecular level. We analyzed two sets of summer wheat germplasms from Australia (Kukri, Drysdale, Gladius, and RAC875) and Europe (Epos, Cornetto, Granny, and Chamsin). Heat stress strongly affected gas exchange parameters leading to reduced photosynthetic and transpiration rates in the European cultivars. These effects were less pronounced in Australian cultivars. Pollen viability was also reduced in all European cultivars. At the transcriptional level, the largest group of heat shock factor genes (type A HSFs), which trigger molecular responses as a result of environmental stimuli, showed small variations in gene expression levels in Australian wheat cultivars. In contrast, HSFs in European cultivars, including Epos and Granny, were strongly downregulated and partly even silenced, while the high-yielding variety Chamsin displayed a strong upregulation of type A HSFs. In conclusion, Australian cultivars are well adapted to moderate heat stress compared to European summer wheat. The latter strongly react after heat stress application by downregulating photosynthesis and transpiration rates as well as differentially regulating HSFs gene expression pattern.

scholarly journals Impact of global climate change on livestock health: Bangladesh perspective

2020 ◽  
Vol 10 (2) ◽  
Author(s):  
Md Zulfekar Ali ◽  
Gemma Carlile ◽  
Mohammad Giasuddin
Keyword(s):  
Climate Change ◽  
Oxidative Stress ◽  
Heat Stress ◽  
Food Security ◽  
Global Climate Change ◽  
Global Climate ◽  
Extreme Weather Events ◽  
Livestock Health ◽  
The Impact ◽  
Global Carbon

The global carbon emission rate, due to energy-driven consumption of fossil fuels and anthropogenic activities, is higher at any point in mankind history, disrupting the global carbon cycle and contributing to a major cause of warming of the planet with air and ocean temperatures, which is rising dangerously over the past century. Climate change presents challenges both direct and indirect for livestock production and health. With more frequent extreme weather events including increased temperatures, livestock health is greatly affected by resulting heat stress, metabolic disorder, oxidative stress, and immune suppression, resulting in an increased propensity for disease incidence and death. The indirect health effects relate to the multiplication and distribution of parasites, reproduction, virulence, and transmission of infectious pathogens and/or their vectors. Managing the growing crossbreeding livestock industry in Bangladesh is also at the coalface for the emerging impacts of climate change, with unknown consequences for the incidence of emerging and re-emerging diseases. Bangladesh is now one of the most vulnerable nations to global climate change. The livestock sector is considered as a major part of food security for Bangladesh, alongside agriculture, and with one of the world’s largest growing economies, the impacts are exaggerated with this disaster. There has been no direct study conducted on the impact of climate  change on livestock health and the diseases in Bangladesh. This review looks to explore the linkage between climate change and livestock health and provide some guidelines to combat the impact on livestock from the Bangladesh perspective. Keywords: Animal health, Climate change, Food security, Heat stress, Oxidative stress.

scholarly journals Heat Stress Related Physiological and Metabolic Traits in Peanut Seedlings

2016 ◽  
Vol 43 (1) ◽  
pp. 24-35 ◽  
Author(s):  
D. Singh ◽  
M. Balota ◽  
E. Collakova ◽  
T.G. Isleib ◽  
G.E. Welbaum ◽  
...  
Keyword(s):  
Heat Stress ◽  
Fatty Acid ◽  
High Temperature ◽  
Unsaturated Fatty Acid ◽  
Stress Responses ◽  
High Temperature Stress ◽  
Growth Stages ◽  
Membrane Injury ◽  
Acid Ratio ◽  
High Yields

ABSTRACT To maintain high yields under an increasingly hotter climate, high temperature resilient peanut cultivars would have to be developed. Therefore, the mechanisms of plant response to heat need to be understood. The objective of this study was to explore the physiological and metabolic mechanisms developed by virginia-type peanut at early growth stages in response to high temperature stress. Peanut seedlings were exposed to 40/35 C (heat) and 30/25 C (optimum temperature) in a growth chamber. Membrane injury (MI), the Fv/Fm ratio, and several metabolites were evaluated in eight genotypes at four time-points (day 1, 2, 4, and 7) after the heat stress treatment initiation. Even though we were able to highlight some metabolites, e.g., hydroxyproline, galactinol, and unsaturated fatty acid, explaining specific differential physiological (MI) responses in peanut seedlings, overall our data suggested general stress responses rather than adaptive mechanisms to heat. Rather than individual metabolites, a combination of several metabolites better explained (41 to 61%) the MI variation in heat stressed peanut seedlings. The genotype SPT 06-07 exhibited lower MI, increased galactinol, reduced hydroxyproline, and higher saturated vs. unsaturated fatty acid ratio under heat stress compared to other genotypes. SPT 06-07 was also separated from the other genotypes during hierarchical clustering and, based on this and previous fieldwork, SPT 06-07 is proposed as a potential source for heat tolerance improvement of virginia-type peanut.

scholarly journals Heat Stress Targeting Individual Organs Reveals the Central Role of Roots and Crowns in Rice Stress Responses

2022 ◽  
Vol 12 ◽  
Author(s):  
Sylva Prerostova ◽  
Jana Jarosova ◽  
Petre I. Dobrev ◽  
Lucia Hluskova ◽  
Vaclav Motyka ◽  
...  
Keyword(s):  
Heat Stress ◽  
Ascorbate Peroxidase ◽  
Peroxidase Activity ◽  
Stress Responses ◽  
Plant Stress ◽  
Growth Strategy ◽  
Whole Plant ◽  
Whole Plants ◽  
Induced Changes ◽  
The Impact

Inter-organ communication and the heat stress (HS; 45°C, 6 h) responses of organs exposed and not directly exposed to HS were evaluated in rice (Oryza sativa) by comparing the impact of HS applied either to whole plants, or only to shoots or roots. Whole-plant HS reduced photosynthetic activity (Fv/Fm and QY_Lss), but this effect was alleviated by prior acclimation (37°C, 2 h). Dynamics of HSFA2d, HSP90.2, HSP90.3, and SIG5 expression revealed high protection of crowns and roots. Additionally, HSP26.2 was strongly expressed in leaves. Whole-plant HS increased levels of jasmonic acid (JA) and cytokinin cis-zeatin in leaves, while up-regulating auxin indole-3-acetic acid and down-regulating trans-zeatin in leaves and crowns. Ascorbate peroxidase activity and expression of alternative oxidases (AOX) increased in leaves and crowns. HS targeted to leaves elevated levels of JA in roots, cis-zeatin in crowns, and ascorbate peroxidase activity in crowns and roots. HS targeted to roots increased levels of abscisic acid and auxin in leaves and crowns, cis-zeatin in leaves, and JA in crowns, while reducing trans-zeatin levels. The weaker protection of leaves reflects the growth strategy of rice. HS treatment of individual organs induced changes in phytohormone levels and antioxidant enzyme activity in non-exposed organs, in order to enhance plant stress tolerance.

scholarly journals A review on the effect of heat stress in wheat (Triticum aestivum L.)

2021 ◽  
Vol 6 (3) ◽  
pp. 381-384
Author(s):  
Preeti Karki ◽  
Enzy Subedi ◽  
Garima Acharya ◽  
Manisha Bashyal ◽  
Nistha Dawadee ◽  
...  
Keyword(s):  
Heat Stress ◽  
High Temperature ◽  
Crop Yields ◽  
Abiotic Factors ◽  
Wheat Yield ◽  
Wheat Plant ◽  
Triticum Aestivum L ◽  
High Temperature Stress ◽  
Factors Affecting ◽  
The World

Wheat is one of the most important cereal crops in the world. It ranks first (in the world) and third (in Nepal) in terms of productivity and total cropped area. Worldwide, wheat provides nearly 55% of the carbohydrates and 20% of the food calories. The ideal temperature for its cultivation is about 15°-20°C. Among several abiotic factors, heat stress is one of the major factors affecting wheat production. Wheat is very sensitive to heat stress. Each degree rise in the temperature can decrease wheat yield by 6%. This review is written with an aim to reflect the influence of heat stress in the production of wheat and the mechanism of how loss in yield occurs. Some of the major findings of this research are : (a) Heat stress negatively effects germination, emergence, root growth, leaf, stem development and growth, tillering, grain yield and quality (b) A sharp decline in photosynthesis is evident when wheat plant is exposed to high temperature stress during vegetative or reproductive phase (c) With increases in temperature, rate of respiration is greater  than the rate of photosynthesis  which ultimately leads to carbon starvation (d) High temperature fastens the crop growth by making it to enter into jointing stage and reproductive stage earlier than normal resulting in decreased crop yield. The identification of such effects of heat stress in our crop helps us adopt several strategies or methods to mitigate the impacts on crop yields and improve tolerance to heat stress.

Sign in / Sign up

Export Citation Format

Share Document