Transient Heat Waves May Affect the Photosynthetic Capacity of Susceptible Wheat Genotypes Due to Insufficient Photosystem I Photoprotection

Chovancek, Erik; Živčák, Marek; Botyanszka, Lenka; Hauptvogel, Pavol; Yang, Xinghong; Misheva, Svetlana; Hussain, Sajad; Brestič, Marián

doi:10.3390/plants8080282

Cited by 55 publications

(28 citation statements)

References 54 publications

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“…Thus, these highly expressed YTH genes in the wheat spikes might function in the development and architecture of spikes. The selection and creation of wheat germplasm with tolerance to multiple abiotic and biotic stresses is a key challenge for wheat breeding [42][43][44][45][46][47][48][49][50][51][52][53][54][55][56]. Our results and those of previous studies reveal that the expression of YTH gene is involved in the responses to various stresses and in plant development [10,13,15,17,21].…”

Section: Discussionsupporting

confidence: 65%

Genome-wide identification and expression analysis of YTH domain-containing RNA-binding protein family in common wheat

et al. 2020

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Background: N6-Methyladenosine (m6A) is the most widespread RNA modification that plays roles in the regulation of genes and genome stability. YT521-B homology (YTH) domain-containing RNA-binding proteins are important RNA binding proteins that affect the fate of m6A-containing RNA by binding m6A. Little is known about the YTH genes in common wheat (Triticum aestivum L.), one of the most important crops for humans. Results: A total of 39 TaYTH genes were identified in common wheat, which are comprised of 13 homologous triads, and could be mapped in 18 out of the 21 chromosomes. A phylogenetic analysis revealed that the TaYTHs could be divided into two groups: YTHDF (TaDF) and YTHDC (TaDC). The TaYTHs in the same group share similar motif distributions and domain organizations, which indicates functional similarity between the closely related TaYTHs. The TaDF proteins share only one domain, which is the YTH domain. In contrast, the TaDCs possess three C3H1-type zinc finger repeats at their N-termini in addition to their central YTH domain. In TaDFs, the predicated aromatic cage pocket that binds the methylysine residue of m6A is composed of tryptophan, tryptophan, and tryptophan (WWW). In contrast, the aromatic cage pocket in the TaDCs is composed of tryptophan, tryptophan, and tyrosine (WWY). In addition to the general aspartic acid or asparagine residue used to form a hydrogen bond with N 1 of m6A, histidine might be utilized in some TaDFb proteins. An analysis of the expression using both online RNA-Seq data and quantitative real-time PCR verification revealed that the TaDFa and TaDFb genes are highly expressed in various tissues/organs compared with that of TaDFcs and TaDCs. In addition, the expression of the TaYTH genes is changed in response to various abiotic stresses. Conclusions: In this study, we identified 39 TaYTH genes from common wheat. The phylogenetic structure, chromosome distribution, and patterns of expression of these genes and their protein structures were analyzed. Our results provide a foundation for the functional analysis of TaYTHs in the future.

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Section: Discussionsupporting

confidence: 65%

Genome-wide identification and expression analysis of YTH domain-containing RNA-binding protein family in common wheat

et al. 2020

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“…For cocksfoot (Dactylis glomerata), the optimum temperature range for maximum net canopy photosynthesis is between 19 and 22 • C and the values declining to lowest at 31 • C [10]. Physiological impairments due heat stress occurs in plants mainly due to reduction of Rubisco activity [11,12], reduction of maximum photochemical efficiency of photosystem II [13,14], reduction of apparent electron transport rate of photosystem I [15], production of reactive oxygen species (ROS) [16,17] and subsequent damages to the cell membranes [18]. Since high temperature stress often coincides with moisture limitation under field conditions, the combined impacts could be over and above the effects of individual stresses [13,14,19].…”

Section: Introductionmentioning

confidence: 99%

Using Leaf Temperature to Improve Simulation of Heat and Drought Stresses in a Biophysical Model

Perera

Cullen

Eckard

2019

Plants

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Despite evidence that leaf temperatures can differ by several degrees from the air, crop simulation models are generally parameterised with air temperatures. Leaf energy budget is a process-based approach that can be used to link climate and physiological processes of plants, but this approach has rarely been used in crop modelling studies. In this study, a controlled environment experiment was used to validate the use of the leaf energy budget approach to calculate leaf temperature for perennial pasture species, and a modelling approach was developed utilising leaf temperature instead of air temperature to achieve a better representation of heat stress impacts on pasture growth in a biophysical model. The controlled environment experiment assessed the impact of two combined seven-day heat (control = 25/15 • C, day/night, moderate = 30/20 • C, day/night, and severe = 35/25 • C, day/night) and drought stresses (with seven-day recovery period between stress periods) on perennial ryegrass (Lolium perenne L.), cocksfoot (Dactylis glomerata L.), tall fescue (Festuca arundinacea Schreb.) and chicory (Cichorium intybus L.). The leaf temperature of each species was modelled by using leaf energy budget equation and validated with measured data. All species showed limited homeothermy with the slope of 0.88 (P < 0.05) suggesting that pasture plants can buffer temperature variations in their growing environment. The DairyMod biophysical model was used to simulate photosynthesis during each treatment, using both air and leaf temperatures, and the patterns were compared with measured data using a response ratio (effect size compared to the well-watered control). The effect size of moderate heat and well-watered treatment was very similar to the measured values (~0.65) when simulated using T leaf, while T air overestimated the consecutive heat stress impacts (0.4 and 0). These results were used to test the heat stress recovery function (Tsum) of perennial ryegrass in DairyMod, finding that recovery after heat stress was well reproduced when parameterized with T sum = 20, while T sum = 50 simulated a long lag phase. Long term pasture growth rate simulations under irrigated conditions in south eastern Australia using leaf temperatures predicted 6-34% and 14-126% higher pasture growth rates, respectively at Ellinbank and Dookie, during late spring and summer months compared to the simulations using air temperatures. This study demonstrated that the simulation of consecutive heat and/or drought stress impacts on pasture production, using DairyMod, can be improved by using leaf temperatures instead of air temperature.

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“…Photosynthesis, one of the most important physiological processes in plants, is highly sensitive to environmental stresses. These stresses often inhibit photosynthesis considerably [ 116 , 117 , 118 , 119 , 120 , 121 , 122 , 123 , 124 ]. Many studies have reported that chloroplasts can act as sensors of the external environment [ 7 , 19 ].…”

Section: Conclusion and Future Perspectivesmentioning

confidence: 99%

The Role of Chloroplast Gene Expression in Plant Responses to Environmental Stress

Zhang

et al. 2020

IJMS

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Chloroplasts are plant organelles that carry out photosynthesis, produce various metabolites, and sense changes in the external environment. Given their endosymbiotic origin, chloroplasts have retained independent genomes and gene-expression machinery. Most genes from the prokaryotic ancestors of chloroplasts were transferred into the nucleus over the course of evolution. However, the importance of chloroplast gene expression in environmental stress responses have recently become more apparent. Here, we discuss the emerging roles of the distinct chloroplast gene expression processes in plant responses to environmental stresses. For example, the transcription and translation of psbA play an important role in high-light stress responses. A better understanding of the connection between chloroplast gene expression and environmental stress responses is crucial for breeding stress-tolerant crops better able to cope with the rapidly changing environment.

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Transient Heat Waves May Affect the Photosynthetic Capacity of Susceptible Wheat Genotypes Due to Insufficient Photosystem I Photoprotection

Cited by 55 publications

References 54 publications

Genome-wide identification and expression analysis of YTH domain-containing RNA-binding protein family in common wheat

Genome-wide identification and expression analysis of YTH domain-containing RNA-binding protein family in common wheat

Using Leaf Temperature to Improve Simulation of Heat and Drought Stresses in a Biophysical Model

The Role of Chloroplast Gene Expression in Plant Responses to Environmental Stress

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