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Shekhar S, Prasad AS, Banjare K, Kaushik A, Mannade AK, Dubey M, Patil A, Premi V, Vishwakarma AK, Sao A, Saxena RR, Dubey A, Chandel G. LMT db: A comprehensive transcriptome database for climate-resilient, nutritionally rich little millet ( Panicum sumatrense). FRONTIERS IN PLANT SCIENCE 2023; 14:1106104. [PMID: 36993866 PMCID: PMC10041709 DOI: 10.3389/fpls.2023.1106104] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Accepted: 02/21/2023] [Indexed: 06/19/2023]
Abstract
Little millet (Panicum sumatrense) a native of Chhattisgarh, belongs to the minor millet group and is primarily known as a climate-resilient and nutritionally rich crop. However, due to the lack of enough Omic studies on the crop, the scientific community has largely remained unaware of the potential of this crop, resulting in less scope for its utilization in crop improvement programs. Looking at global warming, erratic climate change, nutritional security, and limited genetic information available, the Little Millet Transcriptome Database (LMTdb) (https://igkv.ac.in/xenom/index.aspx) was conceptualized upon completion of the transcriptome sequencing of little millet with the aim of deciphering the genetic signatures of this largely unknown crop. The database was developed with the view of providing information about the most comprehensive part of the genome, the 'Transcriptome'. The database includes transcriptome sequence information, functional annotation, microsatellite markers, DEGs, and pathway information. The database is a freely available resource that provides breeders and scientists a portal to search, browse, and query data to facilitate functional and applied Omic studies in millet crops.
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Affiliation(s)
- Shweta Shekhar
- Department of Plant Molecular Biology and Biotechnology, College of Agriculture, Indira Gandhi Krishi Vishwavidyalaya, Raipur, India
| | - Archana S. Prasad
- Department of Plant Molecular Biology and Biotechnology, College of Agriculture, Indira Gandhi Krishi Vishwavidyalaya, Raipur, India
| | - Kalpana Banjare
- Knowledge and Technology Resource Centre, Indira Gandhi Krishi Vishwavidyalaya, Raipur, India
| | - Abhijeet Kaushik
- Knowledge and Technology Resource Centre, Indira Gandhi Krishi Vishwavidyalaya, Raipur, India
| | - Ajit K. Mannade
- Department of Plant Molecular Biology and Biotechnology, College of Agriculture, Indira Gandhi Krishi Vishwavidyalaya, Raipur, India
| | - Mahima Dubey
- Department of Vegetable Biotechnology, VNR Seeds Private Limited, Raipur, India
| | - Arun Patil
- Department of Vegetable Biotechnology, VNR Seeds Private Limited, Raipur, India
| | - Vinay Premi
- Department of Plant Molecular Biology and Biotechnology, College of Agriculture, Indira Gandhi Krishi Vishwavidyalaya, Raipur, India
| | | | - Abhinav Sao
- Department of Genetics and Plant Breeding, College of Agriculture, Indira Gandhi Krishi Vishwavidyalaya, Raipur, India
| | - Ravi R. Saxena
- Knowledge and Technology Resource Centre, Indira Gandhi Krishi Vishwavidyalaya, Raipur, India
| | - Amit Dubey
- Chhattisgarh Council of Science and Technology, Raipur, India
| | - Girish Chandel
- Department of Plant Molecular Biology and Biotechnology, College of Agriculture, Indira Gandhi Krishi Vishwavidyalaya, Raipur, India
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Mulozi L, Vennapusa AR, Elavarthi S, Jacobs OE, Kulkarni KP, Natarajan P, Reddy UK, Melmaiee K. Transcriptome profiling, physiological, and biochemical analyses provide new insights towards drought stress response in sugar maple ( Acer saccharum Marshall) saplings. FRONTIERS IN PLANT SCIENCE 2023; 14:1150204. [PMID: 37152134 PMCID: PMC10154611 DOI: 10.3389/fpls.2023.1150204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Accepted: 03/30/2023] [Indexed: 05/09/2023]
Abstract
Sugar maple (Acer saccharum Marshall) is a temperate tree species in the northeastern parts of the United States and is economically important for its hardwood and syrup production. Sugar maple trees are highly vulnerable to changing climatic conditions, especially drought, so understanding the physiological, biochemical, and molecular responses is critical. The sugar maple saplings were subjected to drought stress for 7, 14, and 21 days and physiological data collected at 7, 14, and 21 days after stress (DAS) showed significantly reduced chlorophyll and Normalized Difference Vegetation Index with increasing drought stress time. The drought stress-induced biochemical changes revealed a higher accumulation of malondialdehyde, proline, and peroxidase activity in response to drought stress. Transcriptome analysis identified a total of 14,099 differentially expressed genes (DEGs); 328 were common among all stress periods. Among the DEGs, transcription factors (including NAC, HSF, ZFPs, GRFs, and ERF), chloroplast-related and stress-responsive genes such as peroxidases, membrane transporters, kinases, and protein detoxifiers were predominant. GO enrichment and KEGG pathway analysis revealed significantly enriched processes related to protein phosphorylation, transmembrane transport, nucleic acids, and metabolic, secondary metabolite biosynthesis pathways, circadian rhythm-plant, and carotenoid biosynthesis in response to drought stress. Time-series transcriptomic analysis revealed changes in gene regulation patterns in eight different clusters, and pathway analysis by individual clusters revealed a hub of stress-responsive pathways. In addition, qRT-PCR validation of selected DEGs revealed that the expression patterns were consistent with transcriptome analysis. The results from this study provide insights into the dynamics of physiological, biochemical, and gene responses to progressive drought stress and reveal the important stress-adaptive mechanisms of sugar maple saplings in response to drought stress.
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Affiliation(s)
- Lungowe Mulozi
- Department of Agriculture and Natural Resources, Delaware State University, Dover, DE, United States
| | - Amaranatha R. Vennapusa
- Department of Agriculture and Natural Resources, Delaware State University, Dover, DE, United States
| | - Sathya Elavarthi
- Department of Agriculture and Natural Resources, Delaware State University, Dover, DE, United States
- *Correspondence: Kalpalatha Melmaiee, ; Sathya Elavarthi,
| | - Oluwatomi E. Jacobs
- Department of Agriculture and Natural Resources, Delaware State University, Dover, DE, United States
| | - Krishnanand P. Kulkarni
- Department of Agriculture and Natural Resources, Delaware State University, Dover, DE, United States
| | - Purushothaman Natarajan
- Department of Biology and Gus R. Douglass Institute, West Virginia State University, Institute, WV, United States
| | - Umesh K. Reddy
- Department of Biology and Gus R. Douglass Institute, West Virginia State University, Institute, WV, United States
| | - Kalpalatha Melmaiee
- Department of Agriculture and Natural Resources, Delaware State University, Dover, DE, United States
- *Correspondence: Kalpalatha Melmaiee, ; Sathya Elavarthi,
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Comparative population genomics in Tabebuia alliance shows evidence of adaptation in Neotropical tree species. Heredity (Edinb) 2022; 128:141-153. [PMID: 35132209 PMCID: PMC8897506 DOI: 10.1038/s41437-021-00491-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 12/07/2021] [Accepted: 12/07/2021] [Indexed: 11/08/2022] Open
Abstract
The role of natural selection in shaping spatial patterns of genetic diversity in the Neotropics is still poorly understood. Here, we perform a genome scan with 24,751 probes targeting 11,026 loci in two Neotropical Bignoniaceae tree species: Handroanthus serratifolius from the seasonally dry tropical forest (SDTF) and Tabebuia aurea from savannas, and compared with the population genomics of H. impetiginosus from SDTF. OutFLANK detected 29 loci in 20 genes with selection signal in H. serratifolius and no loci in T. aurea. Using BayPass, we found evidence of selection in 335 loci in 312 genes in H. serratifolius, 101 loci in 92 genes in T. aurea, and 448 loci in 416 genes in H. impetiginosus. All approaches evidenced several genes affecting plant response to environmental stress and primary metabolic processes. The three species shared no SNPs with selection signal, but we found SNPs affecting the same gene in pair of species. Handroanthus serratifolius showed differences in allele frequencies at SNPs with selection signal among ecosystems, mainly between Caatinga/Cerrado and Atlantic Forest, while H. impetiginosus had one allele fixed across all populations, and T. aurea had similar allele frequency distribution among ecosystems and polymorphism across populations. Taken together, our results indicate that natural selection related to environmental stress shaped the spatial pattern of genetic diversity in the three species. However, the three species have different geographical distribution and niches, which may affect tolerances and adaption, and natural selection may lead to different signatures due to the differences in adaptive landscapes in different niches.
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