Enhanced N‐metabolites, <scp>ABA</scp> and <scp>IAA</scp>‐conjugate in anthers instigate heat sensitivity in spring wheat

Bheemanahalli, Raju; Impa, Somayanda M.; Krassovskaya, Inga; Vennapusa, Amaranatha R.; Gill, Kulvinder S.; Obata, Toshihiro

doi:10.1111/ppl.13109

Cited by 21 publications

(11 citation statements)

References 66 publications

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“…The responses of plants to high temperatures have been described in many cases. These include, among others, various well‐known processes such as the appearance of heat shock proteins (HSPs), activation of the antioxidant system, induction of stress hormones, such as abscisic acid (ABA), at the expense of cytokinins (Yang et al 2019, Bheemanahalli et al 2020, Prerostova et al 2020), etc. Changes in the photosynthetic machinery at high temperatures have also been intensively studied (Allakhverdiev et al 2008, Hu et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Acclimation of photosynthetic processes and metabolic responses to elevated temperatures in cereals

Janda

Tajti

Hamow

et al. 2020

Physiologia Plantarum

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The aim of the present work was to better understand the molecular mechanisms of heat acclimation processes in cereals. A large number of winter and spring wheat, barley and oat varieties were grown under either control conditions (22/20°C) or under a mild heat stress (30°C) that induce the acclimation processes. The temperature dependence of chlorophyll a fluorescence induction and gas exchange parameters showed that heat acclimation increased the thermotolerance of the photosynthetic apparatus, but these changes did not differ sharply in the winter–spring type cereals. Similarly, to wheat, elevated temperature also led to increasing transpiration rate and reduced water use efficiency in barley and oat plants. A non‐targeted metabolomic analysis focusing on polar metabolites in two selected barley (winter type Mv Initium and spring type Conchita) and in two oat varieties (winter type Mv Hópehely and spring type Mv Pehely) revealed substantial differences between both the two species and between the acclimated and non‐acclimated plants. Several compounds, including sugars, organic acids, amino acids and alcohols could be separated and detected. The expression level of the CYP707, HSP90, galactinol synthase, raffinose synthase and α‐galactosidase genes showed genotype‐dependent changes after 1 day; however, the CYP707 was the only one, which was still upregulated in at least some of the genotypes. Results suggest that heat acclimation itself does not require general induction of primary metabolites. However, induction of specific routes, e.g. the induction of the raffinose family oligosaccharides, especially the synthesis of galactinol, may also contribute the improved heat tolerance in cereals.

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Section: Introductionmentioning

confidence: 99%

Acclimation of photosynthetic processes and metabolic responses to elevated temperatures in cereals

Janda

Tajti

Hamow

et al. 2020

Physiologia Plantarum

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“…Increased levels of endogenous ABA under drought stress conditions have been reported in many plant species, which include grain crops like sorghum [ 215 ], rice [ 216 ], barley [ 217 ], the soybean [ 218 ], and wheat [ 219 ]. The level of ABA is also influenced by cold stress in wheat [ 220 ], heat stress in wheat [ 115 , 221 , 222 ], and salt stress in maize [ 223 ]. ABA accumulates in stressed plants, interrupts their photosynthesis, and stimulates stomata closure to reduce water loss through transpiration.…”

Section: Mechanisms Associated With Stress Tolerancementioning

confidence: 99%

The Adaptation and Tolerance of Major Cereals and Legumes to Important Abiotic Stresses

Rane

Singh

Kumar

et al. 2021

IJMS

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Abiotic stresses, including drought, extreme temperatures, salinity, and waterlogging, are the major constraints in crop production. These abiotic stresses are likely to be amplified by climate change with varying temporal and spatial dimensions across the globe. The knowledge about the effects of abiotic stressors on major cereal and legume crops is essential for effective management in unfavorable agro-ecologies. These crops are critical components of cropping systems and the daily diets of millions across the globe. Major cereals like rice, wheat, and maize are highly vulnerable to abiotic stresses, while many grain legumes are grown in abiotic stress-prone areas. Despite extensive investigations, abiotic stress tolerance in crop plants is not fully understood. Current insights into the abiotic stress responses of plants have shown the potential to improve crop tolerance to abiotic stresses. Studies aimed at stress tolerance mechanisms have resulted in the elucidation of traits associated with tolerance in plants, in addition to the molecular control of stress-responsive genes. Some of these studies have paved the way for new opportunities to address the molecular basis of stress responses in plants and identify novel traits and associated genes for the genetic improvement of crop plants. The present review examines the responses of crops under abiotic stresses in terms of changes in morphology, physiology, and biochemistry, focusing on major cereals and legume crops. It also explores emerging opportunities to accelerate our efforts to identify desired traits and genes associated with stress tolerance.

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“…Increased expression of genes involved in glycine, serine, and threonine metabolism under heat stress suggests the possible role of these enzyme activities and their influence on promoting some essential amino acid transportation and synthesis in response to heat stress. Previous studies in plants reported a considerable effect and possible mechanisms with the induction of amino acid synthesis in response to heat stress in plants [43,44]. We found an upregulation pattern of genes encoding enzymes involved in ascorbate and aldarate metabolism, such as UDP-sugar pyrophosphorylase (EC: 2.7.7.64), L-ascorbate peroxidase (EC: 1.11.1.11), and aldehyde dehydrogenase (NAD+) (EC: 1.2.1.3), and downregulation of GDP-L-galactose phosphorylase (EC: 2.7.7.69) at 6-h stress ( Figure S5).…”

Section: Unique Deg-enriched Pathways In V Corymbosummentioning

confidence: 99%

Differential Morpho-Physiological and Transcriptomic Responses to Heat Stress in Two Blueberry Species

Callwood

Melmaiee

Kulkarni

et al. 2021

IJMS

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Blueberries (Vaccinium spp.) are highly vulnerable to changing climatic conditions, especially increasing temperatures. To gain insight into mechanisms underpinning the response to heat stress, two blueberry species were subjected to heat stress for 6 and 9 h at 45 °C, and leaf samples were used to study the morpho-physiological and transcriptomic changes. As compared with Vaccinium corymbosum, Vaccinium darrowii exhibited thermal stress adaptation features such as small leaf size, parallel leaf orientation, waxy leaf coating, increased stomatal surface area, and stomatal closure. RNAseq analysis yielded ~135 million reads and identified 8305 differentially expressed genes (DEGs) during heat stress against the control samples. In V. corymbosum, 2861 and 4565 genes were differentially expressed at 6 and 9 h of heat stress, whereas in V. darrowii, 2516 and 3072 DEGs were differentially expressed at 6 and 9 h, respectively. Among the pathways, the protein processing in the endoplasmic reticulum (ER) was the highly enriched pathway in both the species: however, certain metabolic, fatty acid, photosynthesis-related, peroxisomal, and circadian rhythm pathways were enriched differently among the species. KEGG enrichment analysis of the DEGs revealed important biosynthesis and metabolic pathways crucial in response to heat stress. The GO terms enriched in both the species under heat stress were similar, but more DEGs were enriched for GO terms in V. darrowii than the V. corymbosum. Together, these results elucidate the differential response of morpho-physiological and molecular mechanisms used by both the blueberry species under heat stress, andhelp in understanding the complex mechanisms involved in heat stress tolerance.

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Enhanced N‐metabolites, ABA and IAA‐conjugate in anthers instigate heat sensitivity in spring wheat

Cited by 21 publications

References 66 publications

Acclimation of photosynthetic processes and metabolic responses to elevated temperatures in cereals

Acclimation of photosynthetic processes and metabolic responses to elevated temperatures in cereals

The Adaptation and Tolerance of Major Cereals and Legumes to Important Abiotic Stresses

Differential Morpho-Physiological and Transcriptomic Responses to Heat Stress in Two Blueberry Species

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