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Rizzo AJ, Palacios MB, Vale EM, Zelada AM, Silveira V, Burrieza HP. Snapshot of four mature quinoa ( Chenopodium quinoa) seeds: a shotgun proteomics analysis with emphasis on seed maturation, reserves and early germination. PHYSIOLOGY AND MOLECULAR BIOLOGY OF PLANTS : AN INTERNATIONAL JOURNAL OF FUNCTIONAL PLANT BIOLOGY 2023; 29:319-334. [PMID: 37033760 PMCID: PMC10073371 DOI: 10.1007/s12298-023-01295-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 02/10/2023] [Accepted: 03/08/2023] [Indexed: 06/19/2023]
Abstract
Chenopodium quinoa Willd. is a crop species domesticated over 5000 years ago. This species is highly diverse, with a geographical distribution that covers more than 5000 km from Colombia to Chile, going through a variety of edaphoclimatic conditions. Quinoa grains have great nutritional quality, raising interest at a worldwide level. In this work, by using shotgun proteomics and in silico analysis, we present an overview of mature quinoa seed proteins from a physiological context and considering the process of seed maturation and future seed germination. For this purpose, we selected grains from four contrasting quinoa cultivars (Amarilla de Maranganí, Chadmo, Sajama and Nariño) with different edaphoclimatic and geographical origins. The results give insight on the most important metabolic pathways for mature quinoa seeds including: starch synthesis, protein bodies and lipid bodies composition, reserves and their mobilization, redox homeostasis, and stress related proteins like heat-shock proteins (HSPs) and late embryogenesis abundant proteins (LEAs), as well as evidence for capped and uncapped mRNA translation. LEAs present in our analysis show a specific pattern of expression matching that of other species. Overall, this work presents a complete snapshot of quinoa seeds physiological context, providing a reference point for further studies. Supplementary Information The online version contains supplementary material available at 10.1007/s12298-023-01295-8.
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Affiliation(s)
- Axel Joel Rizzo
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Ciudad Autónoma de Buenos Aires, Argentina
- Laboratorio de Biología del Desarrollo de las Plantas, Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
| | - María Belén Palacios
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Ciudad Autónoma de Buenos Aires, Argentina
- Laboratorio de Biología del Desarrollo de las Plantas, Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
| | - Ellen Moura Vale
- Laboratório de Biotecnologia, Centro de Biociências e Biotecnologia (CBB), Universidade Estadual do Norte Fluminense Darcy Ribeiro (UENF), Campos Dos Goytacazes, RJ Brazil
- Unidade de Biologia Integrativa, Setor de Genômica e Proteômica, UENF, Campos Dos Goytacazes, RJ Brazil
| | - Alicia Mercedes Zelada
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Ciudad Autónoma de Buenos Aires, Argentina
- Laboratorio de Agrobiotecnología, Departamento de Fisiología, Biología Molecular y Celular, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
| | - Vanildo Silveira
- Laboratório de Biotecnologia, Centro de Biociências e Biotecnologia (CBB), Universidade Estadual do Norte Fluminense Darcy Ribeiro (UENF), Campos Dos Goytacazes, RJ Brazil
- Unidade de Biologia Integrativa, Setor de Genômica e Proteômica, UENF, Campos Dos Goytacazes, RJ Brazil
| | - Hernán Pablo Burrieza
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Ciudad Autónoma de Buenos Aires, Argentina
- Laboratorio de Biología del Desarrollo de las Plantas, Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, Argentina
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Gianella M, Doria E, Dondi D, Milanese C, Gallotti L, Börner A, Zannino L, Macovei A, Pagano A, Guzzon F, Biggiogera M, Balestrazzi A. Physiological and molecular aspects of seed longevity: exploring intra-species variation in eight Pisum sativum L. accessions. PHYSIOLOGIA PLANTARUM 2022; 174:e13698. [PMID: 35526223 PMCID: PMC9321030 DOI: 10.1111/ppl.13698] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Revised: 04/20/2022] [Accepted: 05/02/2022] [Indexed: 05/12/2023]
Abstract
Conservation of plant genetic diversity is fundamental for crop improvement, increasing agricultural production and sustainability, especially in the face of climatic changes. Although seed longevity is essential for the management of seed banks, few studies have, so far, addressed differences in this trait among the accessions of a single species. Eight Pisum sativum L. (pea) accessions were investigated to study the impact of long-term (approximately 20 years) storage, aiming to reveal contrasting seed longevity and clarify the causes for these differences. The outstanding seed longevity observed in the G4 accession provided a unique experimental system. To characterize the biochemical and physical status of stored seeds, reactive oxygen species, lipid peroxidation, tocopherols, free proline and reducing sugars were measured. Thermoanalytical measurements (thermogravimetry and differential scanning calorimetry) and transmission electron microscopy combined with immunohistochemical analysis were performed. The long-lived G4 seeds neither consumed tocopherols during storage nor showed free proline accumulation, as a deterioration hallmark, whereas reducing sugars were not affected. Thermal decomposition suggested a biomass composition compatible with the presence of low molecular weight molecules. Expansion of heterochromatic areas and reduced occurrence of γH2AX foci were highlighted in the nucleus of G4 seeds. The longevity of G4 seeds correlates with the occurrence of a reducing cellular environment and a nuclear ultrastructure favourable to genome stability. This work brings novelty to the study of within-species variations in seed longevity, underlining the relevance of multidisciplinary approaches in seed longevity research.
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Affiliation(s)
- Maraeva Gianella
- Department of Biology and Biotechnology ‘L. Spallanzani’University of PaviaPaviaItaly
- Royal Botanic Gardens, Kew, Wakehurst, ArdinglyHaywards HeathWest SussexUK
| | - Enrico Doria
- Department of Biology and Biotechnology ‘L. Spallanzani’University of PaviaPaviaItaly
| | - Daniele Dondi
- C.S.G.I. & Department of ChemistryUniversity of PaviaPaviaItaly
| | - Chiara Milanese
- C.S.G.I. & Department of ChemistryUniversity of PaviaPaviaItaly
| | - Lucia Gallotti
- C.S.G.I. & Department of ChemistryUniversity of PaviaPaviaItaly
| | - Andreas Börner
- Genebank DepartmentLeibniz Institute of Plant Genetics and Crop Plant Research (IPK) CorrensstrSeelandGermany
| | - Lorena Zannino
- Department of Biology and Biotechnology ‘L. Spallanzani’University of PaviaPaviaItaly
| | - Anca Macovei
- Department of Biology and Biotechnology ‘L. Spallanzani’University of PaviaPaviaItaly
| | - Andrea Pagano
- Department of Biology and Biotechnology ‘L. Spallanzani’University of PaviaPaviaItaly
| | - Filippo Guzzon
- International Maize and Wheat Improvement Center (CIMMYT)Carretera México‐VeracruzTexcocoMexico StateMexico
- Centre for Pacific Crops and Trees (CePaCT), Land Resource Division (LRD)Pacific Community (SPC)SuvaFiji
| | - Marco Biggiogera
- Department of Biology and Biotechnology ‘L. Spallanzani’University of PaviaPaviaItaly
| | - Alma Balestrazzi
- Department of Biology and Biotechnology ‘L. Spallanzani’University of PaviaPaviaItaly
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Abstract
Willow (Salix spp.) seeds are able to tolerate desiccation, but differ from typical orthodox seeds in that they lose viability in a few days at room temperature, and in that the chloroplasts in embryo tissues do not dedifferentiate during maturation drying, thus retaining chlorophyll and maintaining intact their thylakoid membranes. In the present study, we investigated the damage generated in willow seeds during storage under appropriate conditions to exclude the eventual generation of reactive oxygen species by photooxidation. To this end, we measured different indicators of molecular damage, such as changes in the fatty acid profile, protein degradation, nuclease activities, and DNA damage, and evaluated normal germination and total germination in seeds stored for one, ten and sixteen years. We found: (i) a decrease in the fraction of unsaturated fatty acids; (ii) changes in the protein profile due to a decrease in protein solubility; (iii) activation of nucleases; and (iv) DNA fragmentation. Taken together, our findings identified programmed cell death as a key mechanism in seed deterioration during storage. We also found that, although the seeds maintained high percentages of total germination, the death program had already started in the seeds stored for ten years and was more advanced in those stored for sixteen years.
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Fleming MB, Patterson EL, Reeves PA, Richards CM, Gaines TA, Walters C. Exploring the fate of mRNA in aging seeds: protection, destruction, or slow decay? JOURNAL OF EXPERIMENTAL BOTANY 2018; 69:4309-4321. [PMID: 29897472 PMCID: PMC6093385 DOI: 10.1093/jxb/ery215] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Accepted: 06/18/2018] [Indexed: 05/20/2023]
Abstract
Seeds exist in the vulnerable state of being unable to repair the chemical degradation all organisms suffer, which slowly ages seeds and eventually results in death. Proposed seed aging mechanisms involve all classes of biological molecules, and degradation of total RNA has been detected contemporaneously with viability loss in dry-stored seeds. To identify changes specific to mRNA, we examined the soybean (Glycine max) seed transcriptome, using new, whole-molecule sequencing technology. We detected strong evidence of transcript fragmentation in 23-year-old, compared with 2-year-old, seeds. Transcripts were broken non-specifically, and greater fragmentation occurred in longer transcripts, consistent with the proposed mechanism of molecular fission by free radical attack at random bases. Seeds died despite high integrity of short transcripts, indicating that functions encoded by short transcripts are not sufficient to maintain viability. This study provides an approach to probe the asymptomatic phase of seed aging, namely by quantifying transcript degradation as a function of storage time.
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Affiliation(s)
- Margaret B Fleming
- USDA-ARS, National Laboratory for Genetic Resource Preservation, Fort Collins, CO, USA
| | - Eric L Patterson
- Department of Bioagricultural Sciences and Pest Management, Colorado State University, Fort Collins, CO, USA
| | - Patrick A Reeves
- USDA-ARS, National Laboratory for Genetic Resource Preservation, Fort Collins, CO, USA
| | | | - Todd A Gaines
- Department of Bioagricultural Sciences and Pest Management, Colorado State University, Fort Collins, CO, USA
| | - Christina Walters
- USDA-ARS, National Laboratory for Genetic Resource Preservation, Fort Collins, CO, USA
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