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Gajardo HA, Morales M, Larama G, Luengo-Escobar A, López D, Machado M, Nunes-Nesi A, Reyes-Díaz M, Planchais S, Savouré A, Gago J, Bravo LA. Physiological, transcriptomic and metabolomic insights of three extremophyte woody species living in the multi-stress environment of the Atacama Desert. PLANTA 2024; 260:55. [PMID: 39020000 DOI: 10.1007/s00425-024-04484-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Accepted: 07/06/2024] [Indexed: 07/19/2024]
Abstract
MAIN CONCLUSIONS In contrast to Neltuma species, S. tamarugo exhibited higher stress tolerance, maintaining photosynthetic performance through enhanced gene expression and metabolites. Differentially accumulated metabolites include chlorophyll and carotenoids and accumulation of non-nitrogen osmoprotectants. Plant species have developed different adaptive strategies to live under extreme environmental conditions. Hypothetically, extremophyte species present a unique configuration of physiological functions that prioritize stress-tolerance mechanisms while carefully managing resource allocation for photosynthesis. This could be particularly challenging under a multi-stress environment, where the synthesis of multiple and sequential molecular mechanisms is induced. We explored this hypothesis in three phylogenetically related woody species co-occurring in the Atacama Desert, Strombocarpa tamarugo, Neltuma alba, and Neltuma chilensis, by analyzing their leaf dehydration and freezing tolerance and by characterizing their photosynthetic performance under natural growth conditions. Besides, the transcriptomic profiling, biochemical analyses of leaf pigments, and metabolite analysis by untargeted metabolomics were conducted to study gene expression and metabolomic landscape within this challenging multi-stress environment. S. tamarugo showed a higher photosynthetic capacity and leaf stress tolerance than the other species. In this species, a multifactorial response was observed, which involves high photochemical activity associated with a higher content of chlorophylls and β-carotene. The oxidative damage of the photosynthetic apparatus is probably attenuated by the synthesis of complex antioxidant molecules in the three species, but S. tamarugo showed the highest antioxidant capacity. Comparative transcriptomic and metabolomic analyses among the species showed the differential expression of genes involved in the biosynthetic pathways of key stress-related metabolites. Moreover, the synthesis of non-nitrogen osmoprotectant molecules, such as ciceritol and mannitol in S. tamarugo, would allow the nitrogen allocation to support its high photosynthetic capacity without compromising leaf dehydration tolerance and freezing stress avoidance.
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Affiliation(s)
- Humberto A Gajardo
- Laboratorio de Fisiología y Biología Molecular Vegetal, Departamento de Ciencias Agronómicas y Recursos Naturales, Facultad de Ciencias Agropecuarias y Medioambiente & Scientific and Technological Bioresource Nucleus, Universidad de La Frontera, Temuco, Chile
| | - Melanie Morales
- Laboratorio de Fisiología y Biología Molecular Vegetal, Departamento de Ciencias Agronómicas y Recursos Naturales, Facultad de Ciencias Agropecuarias y Medioambiente & Scientific and Technological Bioresource Nucleus, Universidad de La Frontera, Temuco, Chile
- Department of Evolutionary Biology, Ecology, and Environmental Sciences, Faculty of Biology, University of Barcelona, Avinguda Diagonal 643, 08028, Barcelona, Spain
| | - Giovanni Larama
- Laboratorio de Fisiología y Biología Molecular Vegetal, Departamento de Ciencias Agronómicas y Recursos Naturales, Facultad de Ciencias Agropecuarias y Medioambiente & Scientific and Technological Bioresource Nucleus, Universidad de La Frontera, Temuco, Chile
| | - Ana Luengo-Escobar
- Laboratorio de Fisiología y Biología Molecular Vegetal, Departamento de Ciencias Agronómicas y Recursos Naturales, Facultad de Ciencias Agropecuarias y Medioambiente & Scientific and Technological Bioresource Nucleus, Universidad de La Frontera, Temuco, Chile
| | - Dariel López
- Laboratorio de Fisiología y Biología Molecular Vegetal, Departamento de Ciencias Agronómicas y Recursos Naturales, Facultad de Ciencias Agropecuarias y Medioambiente & Scientific and Technological Bioresource Nucleus, Universidad de La Frontera, Temuco, Chile
| | - Mariana Machado
- Departamento de Biología Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-900, Brazil
| | - Adriano Nunes-Nesi
- Departamento de Biología Vegetal, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-900, Brazil
| | - Marjorie Reyes-Díaz
- Departamento de Ciencias Químicas y Recursos Naturales, Facultad de Ingeniería y Ciencias, Scientific and Technological Bioresource Nucleus, Universidad de La Frontera, Temuco, Chile
| | - Séverine Planchais
- Institute of Ecology and Environmental Sciences of Paris (iEES), Sorbonne Université, UPEC, CNRS, IRD, INRAE, 75005, Paris, France
| | - Arnould Savouré
- Institute of Ecology and Environmental Sciences of Paris (iEES), Sorbonne Université, UPEC, CNRS, IRD, INRAE, 75005, Paris, France
| | - Jorge Gago
- Research Group On Plant Biology Under Mediterranean Conditions, Departament de Biologia, Universitat de Les Illes Balears/Institute of Agro-Environmental Research and Water Economy-INAGEA, Carretera de Valldemossa, 07122, Palma, Spain
| | - León A Bravo
- Laboratorio de Fisiología y Biología Molecular Vegetal, Departamento de Ciencias Agronómicas y Recursos Naturales, Facultad de Ciencias Agropecuarias y Medioambiente & Scientific and Technological Bioresource Nucleus, Universidad de La Frontera, Temuco, Chile.
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Wu Y, Wang Y, Liu X, Zhang C. Unveiling key mechanisms: Transcriptomic meta-analysis of diverse nanomaterial applications addressing biotic and abiotic stresses in Arabidopsis Thaliana. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 928:172476. [PMID: 38621536 DOI: 10.1016/j.scitotenv.2024.172476] [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: 02/04/2024] [Revised: 03/27/2024] [Accepted: 04/12/2024] [Indexed: 04/17/2024]
Abstract
The potential applications of nanomaterials in agriculture for alleviating diverse biotic and abiotic stresses have garnered significant attention. The reported mechanisms encompass promoting plant growth and development, alleviating oxidative stress, inducing defense responses, modulating plant-microbe interactions, and more. However, individual studies may not fully uncover the common pathways or distinguish the effects of different nanostructures. We examined Arabidopsis thaliana transcriptomes exposed to biotic, abiotic, and metal or carbon-based nanomaterials, utilizing 24 microarray chipsets and 17 RNA-seq sets. The results showed that: 1) from the perspective of different nanostructures, all metal nanomaterials relieved biotic/abiotic stresses via boosting metal homeostasis, particularly zinc and iron. Carbon nanomaterials induce hormone-related immune responses in the presence of both biotic and abiotic stressors. 2) Considering the distinct features of various nanostructures, metal nanomaterials displayed unique characteristics in seed priming for combating abiotic stresses. In contrast, carbon nanomaterials exhibited attractive features in alleviating water deprivation and acting as signaling amplifiers during biotic stress. 3) For shared pathway analysis, response to hypoxia emerges as the predominant and widely shared regulatory mechanism governing diverse stress responses, including those induced by nanomaterials. By deciphering shared and specific pathways and responses, this research opens new avenues for precision nano-agriculture, offering innovative strategies to optimize plant resilience, improve stress management, and advance sustainable crop production practices.
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Affiliation(s)
- Yining Wu
- School of Environment, Beijing Normal University, Beijing 100875, China
| | - Yvjie Wang
- School of Environment, Beijing Normal University, Beijing 100875, China
| | - Xian Liu
- Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Chengdong Zhang
- School of Environment, Beijing Normal University, Beijing 100875, China.
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McLay TGB, Murphy DJ, Holmes GD, Mathews S, Brown GK, Cantrill DJ, Udovicic F, Allnutt TR, Jackson CJ. A genome resource for Acacia, Australia's largest plant genus. PLoS One 2022; 17:e0274267. [PMID: 36240205 PMCID: PMC9565413 DOI: 10.1371/journal.pone.0274267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Accepted: 08/24/2022] [Indexed: 11/05/2022] Open
Abstract
Acacia (Leguminosae, Caesalpinioideae, mimosoid clade) is the largest and most widespread genus of plants in the Australian flora, occupying and dominating a diverse range of environments, with an equally diverse range of forms. For a genus of its size and importance, Acacia currently has surprisingly few genomic resources. Acacia pycnantha, the golden wattle, is a woody shrub or tree occurring in south-eastern Australia and is the country's floral emblem. To assemble a genome for A. pycnantha, we generated long-read sequences using Oxford Nanopore Technology, 10x Genomics Chromium linked reads, and short-read Illumina sequences, and produced an assembly spanning 814 Mb, with a scaffold N50 of 2.8 Mb, and 98.3% of complete Embryophyta BUSCOs. Genome annotation predicted 47,624 protein-coding genes, with 62.3% of the genome predicted to comprise transposable elements. Evolutionary analyses indicated a shared genome duplication event in the Caesalpinioideae, and conflict in the relationships between Cercis (subfamily Cercidoideae) and subfamilies Caesalpinioideae and Papilionoideae (pea-flowered legumes). Comparative genomics identified a suite of expanded and contracted gene families in A. pycnantha, and these were annotated with both GO terms and KEGG functional categories. One expanded gene family of particular interest is involved in flowering time and may be associated with the characteristic synchronous flowering of Acacia. This genome assembly and annotation will be a valuable resource for all studies involving Acacia, including the evolution, conservation, breeding, invasiveness, and physiology of the genus, and for comparative studies of legumes.
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Affiliation(s)
- Todd G. B. McLay
- Royal Botanic Gardens Victoria, South Yarra, Victoria, Australia
- School of BioSciences, The University of Melbourne, Parkville, Victoria, Australia
- Centre for Australian Biodiversity Research, CSIRO, Black Mountain, Australian Capital Territory, Australia
| | - Daniel J. Murphy
- Royal Botanic Gardens Victoria, South Yarra, Victoria, Australia
| | - Gareth D. Holmes
- Royal Botanic Gardens Victoria, South Yarra, Victoria, Australia
| | - Sarah Mathews
- Centre for Australian Biodiversity Research, CSIRO, Black Mountain, Australian Capital Territory, Australia
- Department of Biological Sciences, Louisiana State University, Baton Rouge, Louisiana, United States of America
| | - Gillian K. Brown
- Queensland Herbarium, Department of Environment and Science, Toowong, Queensland, Australia
| | | | - Frank Udovicic
- Royal Botanic Gardens Victoria, South Yarra, Victoria, Australia
| | | | - Chris J. Jackson
- Royal Botanic Gardens Victoria, South Yarra, Victoria, Australia
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