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Bakery A, Vraggalas S, Shalha B, Chauchan H, Benhamed M, Fragkostefanakis S. Heat stress transcription factors as the central molecular rheostat to optimize plant survival and recovery from heat stress. THE NEW PHYTOLOGIST 2024. [PMID: 39061112 DOI: 10.1111/nph.20017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2024] [Accepted: 07/05/2024] [Indexed: 07/28/2024]
Abstract
Heat stress transcription factors (HSFs) are the core regulators of the heat stress (HS) response in plants. HSFs are considered as a molecular rheostat: their activities define the response intensity, incorporating information about the environmental temperature through a network of partner proteins. A prompted activation of HSFs is required for survival, for example the de novo synthesis of heat shock proteins. Furthermore, a timely attenuation of the stress response is necessary for the restoration of cellular functions and recovery from stress. In an ever-changing environment, the balance between thermotolerance and developmental processes such as reproductive fitness highlights the importance of a tightly tuned response. In many cases, the response is described as an ON/OFF mode, while in reality, it is very dynamic. This review compiles recent findings to update existing models about the HSF-regulated HS response and address two timely questions: How do plants adjust the intensity of cellular HS response corresponding to the temperature they experience? How does this adjustment contribute to the fine-tuning of the HS and developmental networks? Understanding these processes is crucial not only for enhancing our basic understanding of plant biology but also for developing strategies to improve crop resilience and productivity under stressful conditions.
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Affiliation(s)
- Ayat Bakery
- Institute of Molecular Biosciences, Plant Cell and Molecular Biology, Goethe University Frankfurt, 60438, Frankfurt am Main, Germany
- Botany Department, Faculty of Science, Ain Shams University, 11517, Cairo, Egypt
| | - Stavros Vraggalas
- Institute of Molecular Biosciences, Plant Cell and Molecular Biology, Goethe University Frankfurt, 60438, Frankfurt am Main, Germany
| | - Boushra Shalha
- Institute of Molecular Biosciences, Plant Cell and Molecular Biology, Goethe University Frankfurt, 60438, Frankfurt am Main, Germany
| | - Harsh Chauchan
- Institute of Molecular Biosciences, Plant Cell and Molecular Biology, Goethe University Frankfurt, 60438, Frankfurt am Main, Germany
- Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, Roorkee, 247 667, Uttarakhand, India
| | - Moussa Benhamed
- Université de Paris Cité, Institute of Plant Sciences Paris-Saclay (IPS2), F-91190, Gif-sur-Yvette, France
- Université Paris-Saclay, CNRS, INRAE, Univ Evry, Institute of Plant Sciences Paris-Saclay (IPS2), Orsay, 91405, France
- Institut Universitaire de France (IUF), Orsay, 91405, France
| | - Sotirios Fragkostefanakis
- Institute of Molecular Biosciences, Plant Cell and Molecular Biology, Goethe University Frankfurt, 60438, Frankfurt am Main, Germany
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Sun T, Wang W, Hu X, Meng L, Xiang L, Wang Y, Wang C, Luo H, Ziyomo C, Chan Z. HSFA3 functions as a positive regulator of HSFA2a to enhance thermotolerance in perennial ryegrass. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2024; 208:108512. [PMID: 38493664 DOI: 10.1016/j.plaphy.2024.108512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Revised: 03/01/2024] [Accepted: 03/07/2024] [Indexed: 03/19/2024]
Abstract
Perennial ryegrass (Lolium perenne) is a widely used cool season turfgrass with outstanding turf quality and grazing tolerance. High temperature is the key factor restricting the distribution of perennial ryegrass in temperate and sub-tropic regions. In this study, we found that one HEAT SHCOK TRANSCRIPTION FACOTR (HSF) class A gene from perennial ryegrass, LpHSFA3, was highly induced by heat stress. LpHSFA3 is localized in nucleus and functions as a transcription factor. Ectopic overexpression of LpHSFA3 in Arabidopsis improved thermotolerance and rescued heat sensitive deficiency of athsfa3 mutant. Overexpression of LpHSFA3 in perennial ryegrass enhanced heat tolerance and increased survival rate in summer season as evidenced by decreased EL and MDA, increased number of green leaves and total chlorophyll content. LpHSFA3 binds to the HSE region in LpHSFA2a promoter to constitutively activate the expression of LpHSFA2a and downstream heat stress responsive genes. Ectopic overexpression of LpHSFA2a consequently rescued thermal sensitivity of athsfa3 mutant and enhanced thermotolerance of athsfa2 mutant. Perennial ryegrass protoplasts with overexpression of LpHSFA3 and LpHSFA2a exhibited induction of similar subsets of heat responsive genes. These results indicated that transcription factor LpHSFA3 functions as positive regulator of LpHSFA2a to improve thermotolerance of perennial ryegrass, providing further evidence to understand the regulatory networks of plant heat stress response.
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Affiliation(s)
- Tianxiao Sun
- National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan, Hubei, 430070, China; Hubei Hongshan Laboratory, Wuhan, 430070, China
| | - Weiliang Wang
- National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Xianmei Hu
- National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Lin Meng
- National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Lin Xiang
- National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Yanping Wang
- National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Caiyun Wang
- National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Hong Luo
- Department of Genetics and Biochemistry, Clemson University, Clemson, SC, 29634, USA
| | - Cathrine Ziyomo
- Biosciences for Africa (B4A), International Livestock Research Institute, Box 30709, 00100, Nairobi, Kenya
| | - Zhulong Chan
- National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan, Hubei, 430070, China; Hubei Hongshan Laboratory, Wuhan, 430070, China.
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Graci S, Barone A. Tomato plant response to heat stress: a focus on candidate genes for yield-related traits. FRONTIERS IN PLANT SCIENCE 2024; 14:1245661. [PMID: 38259925 PMCID: PMC10800405 DOI: 10.3389/fpls.2023.1245661] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Accepted: 12/15/2023] [Indexed: 01/24/2024]
Abstract
Climate change and global warming represent the main threats for many agricultural crops. Tomato is one of the most extensively grown and consumed horticultural products and can survive in a wide range of climatic conditions. However, high temperatures negatively affect both vegetative growth and reproductive processes, resulting in losses of yield and fruit quality traits. Researchers have employed different parameters to evaluate the heat stress tolerance, including evaluation of leaf- (stomatal conductance, net photosynthetic rate, Fv/Fm), flower- (inflorescence number, flower number, stigma exertion), pollen-related traits (pollen germination and viability, pollen tube growth) and fruit yield per plant. Moreover, several authors have gone even further, trying to understand the plants molecular response mechanisms to this stress. The present review focused on the tomato molecular response to heat stress during the reproductive stage, since the increase of temperatures above the optimum usually occurs late in the growing tomato season. Reproductive-related traits directly affects the final yield and are regulated by several genes such as transcriptional factors, heat shock proteins, genes related to flower, flowering, pollen and fruit set, and epigenetic mechanisms involving DNA methylation, histone modification, chromatin remodelling and non-coding RNAs. We provided a detailed list of these genes and their function under high temperature conditions in defining the final yield with the aim to summarize the recent findings and pose the attention on candidate genes that could prompt on the selection and constitution of new thermotolerant tomato plant genotypes able to face this abiotic challenge.
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Affiliation(s)
| | - Amalia Barone
- Department of Agricultural Sciences, University of Naples Federico II, Portici, Naples, Italy
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Tu J, Abid M, Luo J, Zhang Y, Yang E, Cai X, Gao P, Huang H, Wang Z. Genome-wide identification of the heat shock transcription factor gene family in two kiwifruit species. FRONTIERS IN PLANT SCIENCE 2023; 14:1075013. [PMID: 37799558 PMCID: PMC10548268 DOI: 10.3389/fpls.2023.1075013] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Accepted: 08/28/2023] [Indexed: 10/07/2023]
Abstract
High temperatures have a significant impact on plant growth and metabolism. In recent years, the fruit industry has faced a serious threat due to high-temperature stress on fruit plants caused by global warming. In the present study, we explored the molecular regulatory mechanisms that contribute to high-temperature tolerance in kiwifruit. A total of 36 Hsf genes were identified in the A. chinensis (Ac) genome, while 41 Hsf genes were found in the A. eriantha (Ae) genome. Phylogenetic analysis revealed the clustering of kiwifruit Hsfs into three distinct groups (groups A, B, and C). Synteny analysis indicated that the expansion of the Hsf gene family in the Ac and Ae genomes was primarily driven by whole genome duplication (WGD). Analysis of the gene expression profiles revealed a close relationship between the expression levels of Hsf genes and various plant tissues and stress treatments throughout fruit ripening. Subcellular localization analysis demonstrated that GFP-AcHsfA2a/AcHsfA7b and AcHsfA2a/AcHsfA7b -GFP were localized in the nucleus, while GFP-AcHsfA2a was also observed in the cytoplasm of Arabidopsis protoplasts. The results of real-time quantitative polymerase chain reaction (RT-qPCR) and dual-luciferase reporter assay revealed that the majority of Hsf genes, especially AcHsfA2a, were expressed under high-temperature conditions. In conclusion, our findings establish a theoretical foundation for analyzing the potential role of Hsfs in high-temperature stress tolerance in kiwifruit. This study also offers valuable information to aid plant breeders in the development of heat-stress-resistant plant materials.
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Affiliation(s)
- Jing Tu
- College of Life Science, Nanchang University, Nanchang, China
- Lushan Botanical Garden, Chinese Academy of Sciences, Jiujiang, China
| | - Muhammad Abid
- Lushan Botanical Garden, Chinese Academy of Sciences, Jiujiang, China
| | - Juan Luo
- College of Life Science, Nanchang University, Nanchang, China
- Lushan Botanical Garden, Chinese Academy of Sciences, Jiujiang, China
| | - Yi Zhang
- College of Life Science, Nanchang University, Nanchang, China
- Lushan Botanical Garden, Chinese Academy of Sciences, Jiujiang, China
| | - Endian Yang
- College of Life Science, Nanchang University, Nanchang, China
- Lushan Botanical Garden, Chinese Academy of Sciences, Jiujiang, China
| | - Xinxia Cai
- College of Life Science, Nanchang University, Nanchang, China
- Lushan Botanical Garden, Chinese Academy of Sciences, Jiujiang, China
| | - Puxin Gao
- Lushan Botanical Garden, Chinese Academy of Sciences, Jiujiang, China
| | - Hongwen Huang
- College of Life Science, Nanchang University, Nanchang, China
- Lushan Botanical Garden, Chinese Academy of Sciences, Jiujiang, China
| | - Zupeng Wang
- College of Life Science, Nanchang University, Nanchang, China
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Parakkunnel R, Bhojaraja Naik K, Susmita C, Girimalla V, Bhaskar KU, Sripathy KV, Shantharaja CS, Aravindan S, Kumar S, Lakhanpaul S, Bhat KV. Evolution and co-evolution: insights into the divergence of plant heat shock factor genes. PHYSIOLOGY AND MOLECULAR BIOLOGY OF PLANTS : AN INTERNATIONAL JOURNAL OF FUNCTIONAL PLANT BIOLOGY 2022; 28:1029-1047. [PMID: 35722513 PMCID: PMC9203654 DOI: 10.1007/s12298-022-01183-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 04/27/2022] [Accepted: 05/04/2022] [Indexed: 05/03/2023]
Abstract
The Heat Shock Factor (Hsf) genes are widely distributed across the plant kingdom regulating the plant response to various abiotic stresses. In addition to natural selection, breeding and accelerated selection changed the structure and function of Hsf genes. 1076 Hsf genes from 30 genera from primitive algae to the most advanced plant species and major crop plants were used for phylogenetic analysis. The interspecific divergence was studied with 11 members of genus Oryza while intraspecific divergence was studied with sesame pan-genome adapted to diverse ecological niches. B2 genes in eudicots and monocots originated separately while A1 gave rise to the recently evolved Class-C genes and land colonization happened with evolution of A1 genes. An increase in the number of lineages in the Oryza clade with the evolution of AA genome indicated independent domestication and positive selection was observed in > 53% of loci whereas the highly conserved homologues were under purifying selection. The paralogous genes under positive selection exhibited more domain changes for diversified function and increased fitness. A significant co-evolving cluster involving amino acids Phenylalanine, Lysine and Valine played crucial role in maintaining hydrophobic core along with highly conserved Tryptophan residues. A mutation of Glutamic acid to Glutamine was observed in A8 genes of Lamiales affecting protein solvency. Breeding resulted in accumulation of mutations reducing the hydrophobicity of proteins and a further reduction in protein aggregation. This study identify genome duplications, non-neutral selection and co-evolving residues as causing drastic changes in the conserved domain of Hsf proteins. Supplementary information The online version contains supplementary material available at 10.1007/s12298-022-01183-7.
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Affiliation(s)
- Ramya Parakkunnel
- ICAR- Indian Institute of Seed Science, Regional Station, GKVK Campus, Bengaluru, Karnataka 560065 India
| | - K Bhojaraja Naik
- ICAR- Indian Institute of Seed Science, Regional Station, GKVK Campus, Bengaluru, Karnataka 560065 India
| | - C Susmita
- ICAR- Indian Institute of Seed Science, Mau, Uttar Pradesh 275103 India
| | - Vanishree Girimalla
- ICAR- Indian Institute of Seed Science, Regional Station, GKVK Campus, Bengaluru, Karnataka 560065 India
| | - K Udaya Bhaskar
- ICAR- Indian Institute of Seed Science, Regional Station, GKVK Campus, Bengaluru, Karnataka 560065 India
| | - KV Sripathy
- ICAR- Indian Institute of Seed Science, Regional Station, GKVK Campus, Bengaluru, Karnataka 560065 India
| | - CS Shantharaja
- ICAR- Indian Institute of Seed Science, Regional Station, GKVK Campus, Bengaluru, Karnataka 560065 India
| | - S Aravindan
- 4Division of Genomic Resources, ICAR- National Bureau of Plant Genetic Resources, New Delhi, 110012 India
| | - Sanjay Kumar
- ICAR- Indian Institute of Seed Science, Mau, Uttar Pradesh 275103 India
| | | | - KV Bhat
- 4Division of Genomic Resources, ICAR- National Bureau of Plant Genetic Resources, New Delhi, 110012 India
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6
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Lal MK, Tiwari RK, Gahlaut V, Mangal V, Kumar A, Singh MP, Paul V, Kumar S, Singh B, Zinta G. Physiological and molecular insights on wheat responses to heat stress. PLANT CELL REPORTS 2022; 41:501-518. [PMID: 34542670 DOI: 10.1007/s00299-021-02784-4] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Accepted: 09/07/2021] [Indexed: 05/25/2023]
Abstract
Increasing temperature is a key component of global climate change, affecting crop growth and productivity worldwide. Wheat is a major cereal crop grown in various parts of the globe, which is affected severely by heat stress. The morphological parameters affected include germination, seedling establishment, source-sink activity, leaf area, shoot and root growth. The physiological parameters such as photosynthesis, respiration, leaf senescence, water and nutrient relation are also affected by heat. At the cellular level, heat stress leads to the generation of reactive oxygen species that disrupt the membrane system of thylakoid, chloroplast and plasma membrane. The deactivation of the photosystem, reduction in photosynthesis and inactivation of rubisco affect the production of photoassimilates and their allocation. This ultimately affects anthesis, grain filling, size, number and maturity of wheat grains, which hamper crop productivity. The interplay of various systems comprising antioxidants and hormones plays a crucial role in imparting heat stress tolerance in wheat. Thus, implementation of various omics technologies could foster in-depth insights on heat stress effects, eventually devising heat stress mitigation strategies by conventional and modern breeding to develop heat-tolerant wheat varieties. This review provides an integrative view of heat stress responses in wheat and also discusses approaches to develop heat-tolerant wheat varieties.
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Affiliation(s)
- Milan Kumar Lal
- ICAR-Central Potato Research Institute, Shimla, Himachal Pradesh, India
- ICAR-Indian Agricultural Research Institute, New Delhi, India
| | - Rahul Kumar Tiwari
- ICAR-Central Potato Research Institute, Shimla, Himachal Pradesh, India
- ICAR-Indian Agricultural Research Institute, New Delhi, India
| | - Vijay Gahlaut
- Division of Biotechnology, CSIR-Institute of Himalayan Bioresource Technology, Palampur, Himachal Pradesh, India
| | - Vikas Mangal
- ICAR-Central Potato Research Institute, Shimla, Himachal Pradesh, India
| | - Awadhesh Kumar
- ICAR-National Rice Research Institute, Cuttack, Odisha, India
| | - Madan Pal Singh
- ICAR-Indian Agricultural Research Institute, New Delhi, India
| | - Vijay Paul
- ICAR-Indian Agricultural Research Institute, New Delhi, India
| | - Sudhir Kumar
- ICAR-Indian Agricultural Research Institute, New Delhi, India
| | - Brajesh Singh
- ICAR-Central Potato Research Institute, Shimla, Himachal Pradesh, India.
| | - Gaurav Zinta
- Division of Biotechnology, CSIR-Institute of Himalayan Bioresource Technology, Palampur, Himachal Pradesh, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh, India.
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Kevei Z, Ferreira SDS, Casenave CMP, Kurowski T, Mohareb F, Rickett D, Stain C, Thompson AJ. Missense mutation of a class B heat shock factor is responsible for the tomato bushy root-2 phenotype. MOLECULAR HORTICULTURE 2022; 2:4. [PMID: 37789386 PMCID: PMC10515254 DOI: 10.1186/s43897-022-00025-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Accepted: 01/18/2022] [Indexed: 10/05/2023]
Abstract
The bushy root-2 (brt-2) tomato mutant has twisting roots, and slower plant development. Here we used whole genome resequencing and genetic mapping to show that brt-2 is caused by a serine to cysteine (S75C) substitution in the DNA binding domain (DBD) of a heat shock factor class B (HsfB) encoded by SolycHsfB4a. This gene is orthologous to the Arabidopsis SCHIZORIZA gene, also known as AtHsfB4. The brt-2 phenotype is very similar to Arabidopsis lines in which the function of AtHsfB4 is altered: a proliferation of lateral root cap and root meristematic tissues, and a tendency for lateral root cap cells to easily separate. The brt-2 S75C mutation is unusual because all other reported amino acid substitutions in the highly conserved DBD of eukaryotic heat shock factors are dominant negative mutations, but brt-2 is recessive. We further show through reciprocal grafting that brt-2 exerts its effects predominantly through the root genotype even through BRT-2 is expressed at similar levels in both root and shoot meristems. Since AtHsfB4 is induced by root knot nematodes (RKN), and loss-of-function mutants of this gene are resistant to RKNs, BRT-2 could be a target gene for RKN resistance, an important trait in tomato rootstock breeding.Gene & accession numbersSolycHsfB4a - Solyc04g078770.
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Affiliation(s)
- Zoltan Kevei
- Cranfield Soil and AgriFood Institute, College Road, Cranfield University, Bedfordshire, MK43 0AL, UK.
| | | | | | - Tomasz Kurowski
- Cranfield Soil and AgriFood Institute, College Road, Cranfield University, Bedfordshire, MK43 0AL, UK
| | - Fady Mohareb
- Cranfield Soil and AgriFood Institute, College Road, Cranfield University, Bedfordshire, MK43 0AL, UK
| | - Daniel Rickett
- Syngenta Crop Protection, Jealott's Hill International Research Centre, Bracknell, Berkshire, RG42 6EY, UK
| | - Chris Stain
- Syngenta Crop Protection, Jealott's Hill International Research Centre, Bracknell, Berkshire, RG42 6EY, UK
| | - Andrew J Thompson
- Cranfield Soil and AgriFood Institute, College Road, Cranfield University, Bedfordshire, MK43 0AL, UK
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Li XT, Feng XY, Zeng Z, Liu Y, Shao ZQ. Comparative Analysis of HSF Genes From Secale cereale and its Triticeae Relatives Reveal Ancient and Recent Gene Expansions. Front Genet 2021; 12:801218. [PMID: 34887907 PMCID: PMC8650501 DOI: 10.3389/fgene.2021.801218] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Accepted: 11/08/2021] [Indexed: 11/18/2022] Open
Abstract
Plants have evolved sophisticated systems to cope with the environmental stresses, with the heat shock factor (HSF) family proteins composing an integral part of the transcriptional regulation system. Understanding the evolutionary history and functional diversity of HSFs will facilitate improving tolerance of crops to adverse environmental conditions. In this study, genome-wide analysis of Secale cereale identified 31 HSF genes. The total number of HSF genes in S. cereale is larger than that in barley and the three subgenomes of wheat, suggesting it is a valuable resource for mining functional HSFs. Chromosome analysis revealed an uneven distribution of HSF genes among the 7 S. cereale chromosomes, with no HSF gene was detected on chromosome 4. Further interspecies synteny analysis revealed that chromosome reorganization during species-speciation may lead to the escape of HSF genes from the S. cereale chromosome 4. Phylogenetic analysis revealed that S. cereale experienced more HSF gene duplications than barley and the three wheat subgenomes. Expression analysis demonstrated that S. cereale HSF genes showed diverse expression patterns across plant developmental stages and upon drought and freezing treatment, suggesting functional diversity of the gene family. Notably, we detected distinct expression patterns for a recently duplicated HSF gene pair, indicating functional divergence may have occurred between the two genes. The study presents the genome organization, evolutionary features and expression patterns of the S. cereale HSF genes. These results provide new insights into the evolution of HSF genes in Triticeae and may serve as a resource for Triticeae molecular breeding.
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Affiliation(s)
- Xiao-Tong Li
- School of Life Sciences, Nanjing University, Nanjing, China
| | - Xing-Yu Feng
- School of Life Sciences, Nanjing University, Nanjing, China
| | - Zhen Zeng
- School of Life Sciences, Nanjing University, Nanjing, China
| | - Yang Liu
- School of Life Sciences, Nanjing University, Nanjing, China
| | - Zhu-Qing Shao
- School of Life Sciences, Nanjing University, Nanjing, China
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Lohani N, Singh MB, Bhalla PL. RNA-Seq Highlights Molecular Events Associated With Impaired Pollen-Pistil Interactions Following Short-Term Heat Stress in Brassica napus. FRONTIERS IN PLANT SCIENCE 2021; 11:622748. [PMID: 33584763 PMCID: PMC7872974 DOI: 10.3389/fpls.2020.622748] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Accepted: 12/08/2020] [Indexed: 05/09/2023]
Abstract
The global climate change is leading to increased frequency of heatwaves with crops getting exposed to extreme temperature events. Such temperature spikes during the reproductive stage of plant development can harm crop fertility and productivity. Here we report the response of short-term heat stress events on the pollen and pistil tissues in a commercially grown cultivar of Brassica napus. Our data reveals that short-term temperature spikes not only affect pollen fitness but also impair the ability of the pistil to support pollen germination and pollen tube growth and that the heat stress sensitivity of pistil can have severe consequences for seed set and yield. Comparative transcriptome profiling of non-stressed and heat-stressed (40°C for 30 min) pollen and pistil (stigma + style) highlighted the underlying cellular mechanisms involved in heat stress response in these reproductive tissues. In pollen, cell wall organization and cellular transport-related genes possibly regulate pollen fitness under heat stress while the heat stress-induced repression of transcription factor encoding transcripts is a feature of the pistil response. Overall, high temperature altered the expression of genes involved in protein processing, regulation of transcription, pollen-pistil interactions, and misregulation of cellular organization, transport, and metabolism. Our results show that short episodes of high-temperature exposure in B. napus modulate key regulatory pathways disrupted reproductive processes, ultimately translating to yield loss. Further investigations on the genes and networks identified in the present study pave a way toward genetic improvement of the thermotolerance and reproductive performance of B. napus varieties.
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Affiliation(s)
| | | | - Prem L. Bhalla
- Plant Molecular Biology and Biotechnology Laboratory, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Parkville, VIC, Australia
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10
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Panzade KP, Kale SS, Kapale V, Chavan NR. Genome-Wide Analysis of Heat Shock Transcription Factors in Ziziphus jujuba Identifies Potential Candidates for Crop Improvement Under Abiotic Stress. Appl Biochem Biotechnol 2020; 193:1023-1041. [PMID: 33244672 DOI: 10.1007/s12010-020-03463-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Accepted: 11/09/2020] [Indexed: 11/24/2022]
Abstract
Plant heat shock transcription factors (Hsfs) play a significant role in adoption under abiotic stress conditions by modulating the expression of several stress-responsive genes. Analysis of the Hsf gene family will serve to understand the molecular mechanism which is involved in response to abiotic stress. The Ziziphus species grows in warm and dry regions and is inherently tolerant to abiotic stress conditions; thus, Ziziphus is a highly enriched source of genes conferring abiotic stress tolerance. Therefore, the present study provides a comprehensive genome-wide analysis of the Hsf gene family in Z. jujuba. Identified 21 non-redundant Hsf genes were grouped into three major classes (classes A, B, and C) based on the phylogenetic analysis. Promoter and gene ontology analysis suggested that ZjHsfs perform diverse functions in response to abiotic stress conditions. Two paralogous pairs resulting from tandem gene duplication events were identified. Also, physio-chemical properties of chromosomal locations, gene structure, motifs, and protein domain organization of Hsfs were analyzed. Real-time PCR expression analyses revealed that most of the Z. jujuba Hsf genes are differentially expressed in response to heat stress. The analysis suggested ZjHsf-2, ZjHsf-3, ZjHsf-5, ZjHsf-7, ZjHsf-8, ZjHsf-10, ZjHsf-12, ZjHsf-17, and ZjHsf-18 were the outstanding candidate genes for imparting heat stress tolerance and for future functional analysis. The present analysis laid the foundation for understanding the molecular mechanism of the Hsf gene family regulating Z. jujuba development and tolerance to abiotic stress conditions.
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Affiliation(s)
- Kishor Prabhakar Panzade
- Division of Molecular Biology and Biotechnology, Indian Agriculture Research Institute, New Delhi, 110012, India
| | - Sonam S Kale
- Department of Plant Biotechnology, MGM College of Agricultural Biotechnology, Aurangabad, 431003, India
| | - Vijay Kapale
- Govind Ballabh Pant University of Agriculture and Technology, Pantnagar, 263153, India
| | - Narendra R Chavan
- Department of Plant Biotechnology, MGM College of Agricultural Biotechnology, Aurangabad, 431003, India.
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Gai WX, Ma X, Li Y, Xiao JJ, Khan A, Li QH, Gong ZH. CaHsfA1d Improves Plant Thermotolerance via Regulating the Expression of Stress- and Antioxidant-Related Genes. Int J Mol Sci 2020; 21:E8374. [PMID: 33171626 PMCID: PMC7672572 DOI: 10.3390/ijms21218374] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Revised: 11/04/2020] [Accepted: 11/05/2020] [Indexed: 12/16/2022] Open
Abstract
Heat shock transcription factor (Hsf) plays an important role in regulating plant thermotolerance. The function and regulatory mechanism of CaHsfA1d in heat stress tolerance of pepper have not been reported yet. In this study, phylogenetic tree and sequence analyses confirmed that CaHsfA1d is a class A Hsf. CaHsfA1d harbored transcriptional function and predicted the aromatic, hydrophobic, and acidic (AHA) motif mediated function of CaHsfA1d as a transcription activator. Subcellular localization assay showed that CaHsfA1d protein is localized in the nucleus. The CaHsfA1d was transcriptionally up-regulated at high temperatures and its expression in the thermotolerant pepper line R9 was more sensitive than that in thermosensitive pepper line B6. The function of CaHsfA1d under heat stress was characterized in CaHsfA1d-silenced pepper plants and CaHsfA1d-overexpression Arabidopsis plants. Silencing of the CaHsfA1d reduced the thermotolerance of the pepper, while CaHsfA1d-overexpression Arabidopsis plants exhibited an increased insensitivity to high temperatures. Moreover, the CaHsfA1d maintained the H2O2 dynamic balance under heat stress and increased the expression of Hsfs, Hsps (heat shock protein), and antioxidant gene AtGSTU5 (glutathione S-transferase class tau 5) in transgenic lines. Our findings clearly indicate that CaHsfA1d improved the plant thermotolerance via regulating the expression of stress- and antioxidant-related genes.
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Affiliation(s)
- Wen-Xian Gai
- College of Horticulture, Northwest A&F University, Yangling 712100, China; (W.-X.G.); (X.M.); (Y.L.); (J.-J.X.)
| | - Xiao Ma
- College of Horticulture, Northwest A&F University, Yangling 712100, China; (W.-X.G.); (X.M.); (Y.L.); (J.-J.X.)
| | - Yang Li
- College of Horticulture, Northwest A&F University, Yangling 712100, China; (W.-X.G.); (X.M.); (Y.L.); (J.-J.X.)
| | - Jing-Jing Xiao
- College of Horticulture, Northwest A&F University, Yangling 712100, China; (W.-X.G.); (X.M.); (Y.L.); (J.-J.X.)
| | - Abid Khan
- Department of Horticulture, The University of Haripur, Haripur 22620, Pakistan;
| | - Quan-Hui Li
- College of Horticulture, Northwest A&F University, Yangling 712100, China; (W.-X.G.); (X.M.); (Y.L.); (J.-J.X.)
- Academy of Agricultural and Forestry Sciences, Qinghai University, Xining 810016, China
| | - Zhen-Hui Gong
- College of Horticulture, Northwest A&F University, Yangling 712100, China; (W.-X.G.); (X.M.); (Y.L.); (J.-J.X.)
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12
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Wang J, Hu H, Wang W, Wei Q, Hu T, Bao C. Genome-Wide Identification and Functional Characterization of the Heat Shock Factor Family in Eggplant ( Solanum melongena L.) under Abiotic Stress Conditions. PLANTS 2020; 9:plants9070915. [PMID: 32698415 PMCID: PMC7412109 DOI: 10.3390/plants9070915] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/28/2020] [Revised: 07/14/2020] [Accepted: 07/15/2020] [Indexed: 01/10/2023]
Abstract
Plant heat shock factors (Hsfs) play crucial roles in various environmental stress responses. Eggplant (Solanum melongena L.) is an agronomically important and thermophilic vegetable grown worldwide. Although the functions of Hsfs under environmental stress conditions have been characterized in the model plant Arabidopsis thaliana and tomato, their roles in responding to various stresses remain unclear in eggplant. Therefore, we characterized the eggplant SmeHsf family and surveyed expression profiles mediated by the SmeHsfs under various stress conditions. Here, using reported Hsfs from other species as queries to search SmeHsfs in the eggplant genome and confirming the typical conserved domains, we identified 20 SmeHsf genes. The SmeHsfs were further classified into 14 subgroups on the basis of their structure. Additionally, quantitative real-time PCR revealed that SmeHsfs responded to four stresses—cold, heat, salinity and drought—which indicated that SmeHsfs play crucial roles in improving tolerance to various abiotic stresses. The expression pattern of SmeHsfA6b exhibited the most immediate response to the various environmental stresses, except drought. The genome-wide identification and abiotic stress-responsive expression pattern analysis provide clues for further analysis of the roles and regulatory mechanism of SmeHsfs under environmental stresses.
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Janni M, Gullì M, Maestri E, Marmiroli M, Valliyodan B, Nguyen HT, Marmiroli N. Molecular and genetic bases of heat stress responses in crop plants and breeding for increased resilience and productivity. JOURNAL OF EXPERIMENTAL BOTANY 2020; 71:3780-3802. [PMID: 31970395 PMCID: PMC7316970 DOI: 10.1093/jxb/eraa034] [Citation(s) in RCA: 100] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Accepted: 01/20/2020] [Indexed: 05/21/2023]
Abstract
To ensure the food security of future generations and to address the challenge of the 'no hunger zone' proposed by the FAO (Food and Agriculture Organization), crop production must be doubled by 2050, but environmental stresses are counteracting this goal. Heat stress in particular is affecting agricultural crops more frequently and more severely. Since the discovery of the physiological, molecular, and genetic bases of heat stress responses, cultivated plants have become the subject of intense research on how they may avoid or tolerate heat stress by either using natural genetic variation or creating new variation with DNA technologies, mutational breeding, or genome editing. This review reports current understanding of the genetic and molecular bases of heat stress in crops together with recent approaches to creating heat-tolerant varieties. Research is close to a breakthrough of global relevance, breeding plants fitter to face the biggest challenge of our time.
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Affiliation(s)
- Michela Janni
- Institute of Bioscience and Bioresources (IBBR), National Research Council (CNR), Via Amendola, Bari, Italy
- Institute of Materials for Electronics and Magnetism (IMEM), National Research Council (CNR), Parco Area delle Scienze, Parma, Italy
| | - Mariolina Gullì
- Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Parco Area delle Scienze, Parma, Italy
| | - Elena Maestri
- Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Parco Area delle Scienze, Parma, Italy
| | - Marta Marmiroli
- Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Parco Area delle Scienze, Parma, Italy
| | - Babu Valliyodan
- Division of Plant Sciences, University of Missouri, Columbia, MO, USA
- Lincoln University, Jefferson City, MO, USA
| | - Henry T Nguyen
- Division of Plant Sciences, University of Missouri, Columbia, MO, USA
| | - Nelson Marmiroli
- Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Parco Area delle Scienze, Parma, Italy
- CINSA Interuniversity Consortium for Environmental Sciences, Parma/Venice, Italy
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14
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Hu Y, Mesihovic A, Jiménez-Gómez JM, Röth S, Gebhardt P, Bublak D, Bovy A, Scharf KD, Schleiff E, Fragkostefanakis S. Natural variation in HsfA2 pre-mRNA splicing is associated with changes in thermotolerance during tomato domestication. THE NEW PHYTOLOGIST 2020; 225:1297-1310. [PMID: 31556121 DOI: 10.1111/nph.16221] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Accepted: 09/18/2019] [Indexed: 05/22/2023]
Abstract
Wild relatives of crops thrive in habitats where environmental conditions can be restrictive for productivity and survival of cultivated species. The genetic basis of this variability, particularly for tolerance to high temperatures, is not well understood. We examined the capacity of wild and cultivated accessions to acclimate to rapid temperature elevations that cause heat stress (HS). We investigated genotypic variation in thermotolerance of seedlings of wild and cultivated accessions. The contribution of polymorphisms associated with thermotolerance variation was examined regarding alterations in function of the identified gene. We show that tomato germplasm underwent a progressive loss of acclimation to strong temperature elevations. Sensitivity is associated with intronic polymorphisms in the HS transcription factor HsfA2 which affect the splicing efficiency of its pre-mRNA. Intron splicing in wild species results in increased synthesis of isoform HsfA2-II, implicated in the early stress response, at the expense of HsfA2-I which is involved in establishing short-term acclimation and thermotolerance. We propose that the selection for modern HsfA2 haplotypes reduced the ability of cultivated tomatoes to rapidly acclimate to temperature elevations, but enhanced their short-term acclimation capacity. Hence, we provide evidence that alternative splicing has a central role in the definition of plant fitness plasticity to stressful conditions.
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Affiliation(s)
- Yangjie Hu
- Department of Biosciences, Molecular Cell Biology of Plants, Goethe University, D-60438, Frankfurt am Main, Germany
| | - Anida Mesihovic
- Department of Biosciences, Molecular Cell Biology of Plants, Goethe University, D-60438, Frankfurt am Main, Germany
| | - José M Jiménez-Gómez
- Institut Jean-Pierre Bourgin, INRA, AgroParisTech, CNRS, Université Paris-Saclay, RD10, 78026, Versailles Cedex, France
- Department of Plant Breeding and Genetics, Max Planck Institute for Plant Breeding Research, Carl-von-Linné-Weg 10, 50829, Cologne, Germany
| | - Sascha Röth
- Department of Biosciences, Molecular Cell Biology of Plants, Goethe University, D-60438, Frankfurt am Main, Germany
| | - Philipp Gebhardt
- Department of Biosciences, Molecular Cell Biology of Plants, Goethe University, D-60438, Frankfurt am Main, Germany
| | - Daniela Bublak
- Department of Biosciences, Molecular Cell Biology of Plants, Goethe University, D-60438, Frankfurt am Main, Germany
| | - Arnaud Bovy
- Plant Breeding, Wageningen University, Wageningen, 6708PB, the Netherlands
| | - Klaus-Dieter Scharf
- Department of Biosciences, Molecular Cell Biology of Plants, Goethe University, D-60438, Frankfurt am Main, Germany
| | - Enrico Schleiff
- Department of Biosciences, Molecular Cell Biology of Plants, Goethe University, D-60438, Frankfurt am Main, Germany
- Cluster of Excellence Frankfurt, Goethe University, D-60438, Frankfurt am Main, Germany
- Buchmann Institute for Molecular Life Sciences (BMLS), Goethe University, D-60438, Frankfurt am Main, Germany
- Frankfurt Institute of Advanced Studies (FIAS), D-60438, Frankfurt am Main, Germany
| | - Sotirios Fragkostefanakis
- Department of Biosciences, Molecular Cell Biology of Plants, Goethe University, D-60438, Frankfurt am Main, Germany
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Accelerating Breeding for Heat Tolerance in Tomato (Solanum lycopersicum L.): An Integrated Approach. AGRONOMY-BASEL 2019. [DOI: 10.3390/agronomy9110720] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Heat stress is a major limiting factor for crop productivity. Tomato is highly sensitive to heat stress, which can result in a total yield loss. To adapt to current and future heat stress, there is a dire need to develop heat tolerant cultivars. Here, we review recent attempts to improve screening for heat tolerance and to exploit genetic and genomic resources in tomatoes. We provide key factors related to phenotyping environments and traits (morphological, physiological, and metabolic) to be considered to identify and breed thermo-tolerant genotypes. There is significant variability in tomato germplasm that can be harnessed to breed for thermo-tolerance. Based on our review, we propose that the use of advanced backcross populations and chromosome segments substitution lines is the best means to exploit variability for heat tolerance in non-cultivated tomato species. We applied a meta quantitative trait loci (MQTL) analysis on data from four mapping experiments to co-localize QTL associated with heat tolerance traits (e.g., pollen viability, number of pollen, number of flowers, style protrusion, style length). The analysis revealed 13 MQTL of which 11 were composed of a cluster of QTL. Overall, there was a reduction of about 1.5-fold in the confidence interval (CI) of the MQTL (31.82 cM) compared to the average CI of individual QTL (47.4 cM). This confidence interval is still large and additional mapping resolution approaches such as association mapping and multi-parent linkage mapping are needed. Further investigations are required to decipher the genetic architecture of heat tolerance surrogate traits in tomatoes. Genomic selection and new breeding techniques including genome editing and speed breeding hold promise to fast-track development of improved heat tolerance and other farmer- and consumer-preferred traits in tomatoes.
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Tang M, Xu L, Wang Y, Cheng W, Luo X, Xie Y, Fan L, Liu L. Genome-wide characterization and evolutionary analysis of heat shock transcription factors (HSFs) to reveal their potential role under abiotic stresses in radish (Raphanus sativus L.). BMC Genomics 2019; 20:772. [PMID: 31651257 PMCID: PMC6814140 DOI: 10.1186/s12864-019-6121-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2019] [Accepted: 09/20/2019] [Indexed: 12/20/2022] Open
Abstract
Background Abiotic stresses due to climate change pose a great threat to crop production. Heat shock transcription factors (HSFs) are vital regulators that play key roles in protecting plants against various abiotic stresses. Therefore, the identification and characterization of HSFs is imperative to dissect the mechanism responsible for plant stress responses. Although the HSF gene family has been extensively studied in several plant species, its characterization, evolutionary history and expression patterns in the radish (Raphanus sativus L.) remain limited. Results In this study, 33 RsHSF genes were obtained from the radish genome, which were classified into three main groups based on HSF protein domain structure. Chromosomal localization analysis revealed that 28 of 33 RsHSF genes were located on nine chromosomes, and 10 duplicated RsHSF genes were grouped into eight gene pairs by whole genome duplication (WGD). Moreover, there were 23 or 9 pairs of orthologous HSFs were identified between radish and Arabidopsis or rice, respectively. Comparative analysis revealed a close relationship among radish, Chinese cabbage and Arabidopsis. RNA-seq data showed that eight RsHSF genes including RsHSF-03, were highly expressed in the leaf, root, cortex, cambium and xylem, indicating that these genes might be involved in plant growth and development. Further, quantitative real-time polymerase chain reaction (RT-qPCR) indicated that the expression patterns of 12 RsHSF genes varied upon exposure to different abiotic stresses including heat, salt, and heavy metals. These results indicated that the RsHSFs may be involved in abiotic stress response. Conclusions These results could provide fundamental insights into the characteristics and evolution of the HSF family and facilitate further dissection of the molecular mechanism responsible for radish abiotic stress responses.
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Affiliation(s)
- Mingjia Tang
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Key Laboratory of Horticultural Crop Biology and Genetic Improvement (East China) of MOA, College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, People's Republic of China
| | - Liang Xu
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Key Laboratory of Horticultural Crop Biology and Genetic Improvement (East China) of MOA, College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, People's Republic of China
| | - Yan Wang
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Key Laboratory of Horticultural Crop Biology and Genetic Improvement (East China) of MOA, College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, People's Republic of China
| | - Wanwan Cheng
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Key Laboratory of Horticultural Crop Biology and Genetic Improvement (East China) of MOA, College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, People's Republic of China
| | - Xiaobo Luo
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Key Laboratory of Horticultural Crop Biology and Genetic Improvement (East China) of MOA, College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, People's Republic of China
| | - Yang Xie
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Key Laboratory of Horticultural Crop Biology and Genetic Improvement (East China) of MOA, College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, People's Republic of China
| | - Lianxue Fan
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Key Laboratory of Horticultural Crop Biology and Genetic Improvement (East China) of MOA, College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, People's Republic of China
| | - Liwang Liu
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Key Laboratory of Horticultural Crop Biology and Genetic Improvement (East China) of MOA, College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, People's Republic of China.
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17
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Transcriptomic Responses of Dove Tree (Davidia involucrata Baill.) to Heat Stress at the Seedling Stage. FORESTS 2019. [DOI: 10.3390/f10080656] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The dove tree (Davidia involucrata Baill.), a tertiary relic species, is adapted to cool climates. With the progression of global warming, high-temperature stress has become the primary environmental factor restricting geographic distribution, ex situ conservation, and landscape application for D. involucrata resources. However, the detailed molecular events underlying D. involucrata responses to heat stress are poorly understood. Here, we conducted RNA-Seq-based gene expression profiling in D. involucrata seedlings during the time course of a 42 °C heat treatment (0, 1, 6, and 12 h). After de novo assembly, we obtained 138,923 unigenes, of which 69,743 were annotated in public databases. Furthermore, 19,532, 20,497 and 27,716 differentially expressed genes (DEGs) were identified after 1 h (HS1), 6 h (HS6), and 12 h (HS12) of heat treatment in comparison to 0 h (HS0), respectively. Based on a KEGG enrichment analysis, the two pathways “protein processing in endoplasmic reticulum” and “plant hormone signal transduction” are hypothesized to play vital roles during heat response in D. involucrata, and their potential interactions during heat stress are also discussed. In addition, 32 genes encoding putative heat shock transcription factors (Hsfs) were found to be associated with the response of D. involucrata to heat stress. Finally, the expression patterns of eight heat-responsive genes derived from qRT-PCR were in agreement with their transcript level alterations, as determined by a transcriptome analysis. Taken together, our transcriptomic data provide the first comprehensive transcriptional profile affected by heat stress in D. involucrata, which will facilitate further studies on the improvement of heat tolerance in this rare and endangered species.
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Marko D, El-Shershaby A, Carriero F, Summerer S, Petrozza A, Iannacone R, Schleiff E, Fragkostefanakis S. Identification and Characterization of a Thermotolerant TILLING Allele of Heat Shock Binding Protein 1 in Tomato. Genes (Basel) 2019; 10:genes10070516. [PMID: 31284688 PMCID: PMC6678839 DOI: 10.3390/genes10070516] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Revised: 06/30/2019] [Accepted: 07/04/2019] [Indexed: 11/20/2022] Open
Abstract
The identification of heat stress (HS)-resilient germplasm is important to ensure food security under less favorable environmental conditions. For that, germplasm with an altered activity of factors regulating the HS response is an important genetic tool for crop improvement. Heat shock binding protein (HSBP) is one of the main negative regulators of HS response, acting as a repressor of the activity of HS transcription factors. We identified a TILLING allele of Solanum lycopersicum (tomato) HSBP1. We examined the effects of the mutation on the functionality of the protein in tomato protoplasts, and compared the thermotolerance capacity of lines carrying the wild-type and mutant alleles of HSBP1. The methionine-to-isoleucine mutation in the central heptad repeats of HSBP1 leads to a partial loss of protein function, thereby reducing the inhibitory effect on Hsf activity. Mutant seedlings show enhanced basal thermotolerance, while mature plants exhibit increased resilience in repeated HS treatments, as shown by several physiological parameters. Importantly, plants that are homozygous for the wild-type or mutant HSBP1 alleles showed no significant differences under non-stressed conditions. Altogether, these results indicate that the identified mutant HSBP1 allele can be used as a genetic tool in breeding, aiming to improve the thermotolerance of tomato varieties.
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Affiliation(s)
- Dominik Marko
- Department of Biosciences, Molecular Cell Biology of Plants, Goethe University, D-60438 Frankfurt am Main, Germany
- ALSIA Research Center Metapontum Agrobios S.S. Jonica 106 Km 448,2 -75100 Matera, Italy
| | - Asmaa El-Shershaby
- Department of Biosciences, Molecular Cell Biology of Plants, Goethe University, D-60438 Frankfurt am Main, Germany
- Department of Molecular Biology, Genetic Engineering and Biotechnology Division, National Research Centre, 12311 Dokki, Giza, Egypt
| | - Filomena Carriero
- ALSIA Research Center Metapontum Agrobios S.S. Jonica 106 Km 448,2 -75100 Matera, Italy
| | - Stephan Summerer
- ALSIA Research Center Metapontum Agrobios S.S. Jonica 106 Km 448,2 -75100 Matera, Italy
| | - Angelo Petrozza
- ALSIA Research Center Metapontum Agrobios S.S. Jonica 106 Km 448,2 -75100 Matera, Italy
| | - Rina Iannacone
- ALSIA Research Center Metapontum Agrobios S.S. Jonica 106 Km 448,2 -75100 Matera, Italy
| | - Enrico Schleiff
- Department of Biosciences, Molecular Cell Biology of Plants, Goethe University, D-60438 Frankfurt am Main, Germany.
- Frankfurt Institute of Advanced Studies (FIAS), D-60438 Frankfurt am Main, Germany.
- Buchmann Institute for Molecular Life Sciences (BMLS), Goethe University, D-60438 Frankfurt am Main, Germany.
| | - Sotirios Fragkostefanakis
- Department of Biosciences, Molecular Cell Biology of Plants, Goethe University, D-60438 Frankfurt am Main, Germany
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Yu XY, Yao Y, Hong YH, Hou PY, Li CX, Xia ZQ, Geng MT, Chen YH. Differential expression of the Hsf family in cassava under biotic and abiotic stresses. Genome 2019; 62:563-569. [PMID: 31158327 DOI: 10.1139/gen-2018-0163] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Heat shock transcription factors (Hsfs) are important regulators of biotic and abiotic stress responses in plants. Currently, the Hsf gene family is not well understood in cassava, an important tropical crop. In the present study, 32 MeHsf genes were identified from the cassava genome database, which were divided into three types based on functional domain and motif distribution analyses. Analysis of the differential expression of the genes belonging to the Hsf family in cassava was carried out based on published cassava transcriptome data from tissues/organs (leaf blade, leaf midvein, lateral buds, organized embryogenic structures, friable embryogenic callus, fibrous roots, storage roots, stem, petiole, shoot apical meristem, and root apical meristem) under abiotic stress (cold, drought) or biotic stress (mealybugs. cassava brown streak disease, cassava bacterial blight). The results show the expression diversity of cassava Hsfs genes in various tissues/organs. The transcript levels of MeHsfB3a, MeHsfA6a, MeHsfA2a, and MeHsfA9b were upregulated by abiotic and biotic stresses, such as cold, drought, cassava bacterial blight, cassava brown streak disease, and mealybugs, indicating their potential roles in mediating the response of cassava plants to environment stresses. Further interaction network and co-expression analyses suggests that Hsf genes may interact with Hsp70 family members to resist environmental stresses in cassava. These results provide valuable information for future studies of the functional characterization of the MeHsf gene family.
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Affiliation(s)
- Xin-Yi Yu
- a Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, Institute of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China
| | - Yuan Yao
- b Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China
| | - Yu-Hui Hong
- a Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, Institute of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China
| | - Peng-Yu Hou
- a Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, Institute of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China
| | - Chun-Xia Li
- a Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, Institute of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China
| | - Zhi-Qiang Xia
- b Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China
| | - Meng-Ting Geng
- a Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, Institute of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China
| | - Yin-Hua Chen
- a Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, Institute of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China
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Saha D, Mukherjee P, Dutta S, Meena K, Sarkar SK, Mandal AB, Dasgupta T, Mitra J. Genomic insights into HSFs as candidate genes for high-temperature stress adaptation and gene editing with minimal off-target effects in flax. Sci Rep 2019; 9:5581. [PMID: 30944362 PMCID: PMC6447620 DOI: 10.1038/s41598-019-41936-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Accepted: 03/21/2019] [Indexed: 12/17/2022] Open
Abstract
Flax (Linum usitatissimum) is a cool season crop commercially cultivated for seed oil and stem fibre production. A comprehensive characterization of the heat shock factor (HSF) candidate genes in flax can accelerate genetic improvement and adaptive breeding for high temperature stress tolerance. We report the genome-wide identification of 34 putative HSF genes from the flax genome, which we mapped on 14 of the 15 chromosomes. Through comparative homology analysis, we classified these genes into three broad groups, and sub-groups. The arrangement of HSF-specific protein motifs, DNA-binding domain (DBD) and hydrophobic heptad repeat (HR-A/B), and exon-intron boundaries substantiated the phylogenetic separation of these genes. Orthologous relationships and evolutionary analysis revealed that the co-evolution of the LusHSF genes was due to recent genome duplication events. Digital and RT-qPCR analyses provided significant evidence of the differential expression of the LusHSF genes in various tissues, at various developmental stages, and in response to high-temperature stress. The co-localization of diverse cis-acting elements in the promoters of the LusHSF genes further emphasized their regulatory roles in the abiotic stress response. We further confirmed DNA-binding sites on the LusHSF proteins and designed guide RNA sequences for gene editing with minimal off-target effects. These results will hasten functional investigations of LusHSFs or assist in devising genome engineering strategies to develop high-temperature stress tolerant flax cultivars.
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Affiliation(s)
- Dipnarayan Saha
- Division of Crop Improvement, ICAR-Central Research Institute for Jute and Allied Fibres, Kolkata, West Bengal, 700121, India.
| | - Pranit Mukherjee
- Division of Crop Improvement, ICAR-Central Research Institute for Jute and Allied Fibres, Kolkata, West Bengal, 700121, India
| | - Sourav Dutta
- Division of Crop Improvement, ICAR-Central Research Institute for Jute and Allied Fibres, Kolkata, West Bengal, 700121, India
| | - Kanti Meena
- Division of Crop Improvement, ICAR-Central Research Institute for Jute and Allied Fibres, Kolkata, West Bengal, 700121, India
| | - Surja Kumar Sarkar
- Division of Crop Improvement, ICAR-Central Research Institute for Jute and Allied Fibres, Kolkata, West Bengal, 700121, India
| | - Asit Baran Mandal
- Division of Crop Improvement, ICAR-Central Research Institute for Jute and Allied Fibres, Kolkata, West Bengal, 700121, India
| | - Tapash Dasgupta
- Faculty Centre for Integrated Rural Development and Management, Ramakrishna Mission Vivekananda Educational and Research Institute, Ramakrishna Mission Ashrama, Narendrapur, Kolkata, 700103, West Bengal, India
| | - Jiban Mitra
- Division of Crop Improvement, ICAR-Central Research Institute for Jute and Allied Fibres, Kolkata, West Bengal, 700121, India
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