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Cortés-Eslava J, Gómez-Arroyo S, Cortés PAM, Jiménez-García LF, Lara-Martínez R, Arenas-Huertero F, Morton-Bermea O, Testillano PS. The wild plant Gnaphalium lavandulifolium as a sentinel for biomonitoring the effects of environmental heavy metals in the metropolitan area of México Valley. ENVIRONMENTAL MONITORING AND ASSESSMENT 2022; 195:195. [PMID: 36512105 DOI: 10.1007/s10661-022-10763-9] [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: 04/04/2022] [Accepted: 11/12/2022] [Indexed: 06/17/2023]
Abstract
Biomonitoring is a valuable tool for assessing the presence and effects of air pollutants such as heavy metals (HM); due to their toxicity and stability, these compounds can affect human health and the balance of ecosystems. To assess its potential as a sentinel organism of HM pollution, the wild plant Gnaphalium lavandulifolium was exposed to four sites in the metropolitan area of México Valley (MAMV): Altzomoni (ALT) Coyoacán (COY), Ecatepec (ECA), and Tlalnepantla (TLA) during 2, 4, and 8 weeks, between October and November 2019. Control plants remained under controlled conditions. The chemical analysis determined twelve HM (Al, As, Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb, V, and Zn) in the leaves. Macroscopic damage to the leaves, later determined in semi-thin sections under light microscopy, lead to a finer analysis. Transmission electron microscope (TEM) showed major structural changes: chromatin condensation, protoplast shrinkage, cytoplasm vacuolization, cell wall thinning, decreased number and size of starch grains, and plastoglobules in chloroplasts. All these characteristics of stress-induced programed cell death (sPCD) were related to the significant increase of toxic HM in the leaves of the exposed plants compared to the control (p < 0.05). Immunohistochemistry revealed a significant amount of proteases with caspase 3-like activity in ECA and TLA samples during long exposure times. Ultrastructural changes and sPCD features detected confirmed the usefulness of G. lavandulifolium as a good biomonitor of HM contamination. They supported the possibility of considering subcellular changes as markers of abiotic stress conditions in plants.
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Affiliation(s)
- Josefina Cortés-Eslava
- Laboratorio de Genotoxicología y Mutagénesis Ambientales, Instituto de Ciencias de la Atmósfera y Cambio Climático, Universidad Nacional Autónoma de México, Ciudad Universitaria, Coyoacán, 04510, Ciudad de Mexico, México
| | - Sandra Gómez-Arroyo
- Laboratorio de Genotoxicología y Mutagénesis Ambientales, Instituto de Ciencias de la Atmósfera y Cambio Climático, Universidad Nacional Autónoma de México, Ciudad Universitaria, Coyoacán, 04510, Ciudad de Mexico, México.
| | - Pablo Antonio Mérida Cortés
- Laboratorio de Genotoxicología y Mutagénesis Ambientales, Instituto de Ciencias de la Atmósfera y Cambio Climático, Universidad Nacional Autónoma de México, Ciudad Universitaria, Coyoacán, 04510, Ciudad de Mexico, México
| | - Luis Felipe Jiménez-García
- Laboratorio de Microscopía Electrónica, Departamento de Biología Celular, Facultad de Ciencias, Universidad Nacional Autónoma de México, Ciudad Universitaria, Coyoacán, 04510, Ciudad de Mexico, México
| | - Reyna Lara-Martínez
- Laboratorio de Microscopía Electrónica, Departamento de Biología Celular, Facultad de Ciencias, Universidad Nacional Autónoma de México, Ciudad Universitaria, Coyoacán, 04510, Ciudad de Mexico, México
| | - Francisco Arenas-Huertero
- Laboratorio de Investigación en Patología Experimental, Hospital Infantil de México Federico Gómez, Ciudad de Mexico, México
| | - Ofelia Morton-Bermea
- Laboratorio de Geomagnetismo y Exploración Geofísica, Instituto de Geofísica, Universidad Nacional Autónoma de México, Ciudad Universitaria, Coyoacán, 04510, Ciudad de Mexico, México
| | - Pilar S Testillano
- Laboratory of Pollen Biotechnology of Crop Plants, Centro de Investigaciones Biológicas Margarita Salas (CIB), C.S.I.C, Ramiro de Maeztu, 9, 28040, Madrid, Spain
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Berenguer E, Minina EA, Carneros E, B�r�ny I, Bozhkov PV, Testillano PS. Suppression of Metacaspase- and Autophagy-Dependent Cell Death Improves Stress-Induced Microspore Embryogenesis in Brassica napus. PLANT & CELL PHYSIOLOGY 2021; 61:2097-2110. [PMID: 33057654 PMCID: PMC7861468 DOI: 10.1093/pcp/pcaa128] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Accepted: 09/29/2020] [Indexed: 05/12/2023]
Abstract
Microspore embryogenesis is a biotechnological process that allows us to rapidly obtain doubled-haploid plants for breeding programs. The process is initiated by the application of stress treatment, which reprograms microspores to embark on embryonic development. Typically, a part of the microspores undergoes cell death that reduces the efficiency of the process. Metacaspases (MCAs), a phylogenetically broad group of cysteine proteases, and autophagy, the major catabolic process in eukaryotes, are critical regulators of the balance between cell death and survival in various organisms. In this study, we analyzed the role of MCAs and autophagy in cell death during stress-induced microspore embryogenesis in Brassica napus. We demonstrate that this cell death is accompanied by the transcriptional upregulation of three BnMCA genes (BnMCA-Ia, BnMCA-IIa and BnMCA-IIi), an increase in MCA proteolytic activity and the activation of autophagy. Accordingly, inhibition of autophagy and MCA activity, either individually or in combination, suppressed cell death and increased the number of proembryos, indicating that both components play a pro-cell death role and account for decreased efficiency of early embryonic development. Therefore, MCAs and/or autophagy can be used as new biotechnological targets to improve in vitro embryogenesis in Brassica species and doubled-haploid plant production in crop breeding and propagation programs.
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Affiliation(s)
- Eduardo Berenguer
- Microbial and Plant Biotechnology Department, Pollen Biotechnology of Crop Plants Laboratory, Margarita Salas Center of Biological Research, CIB Margarita Salas-CSIC, Ramiro de Maeztu 9, Madrid 28040, Spain
| | - Elena A Minina
- Department of Molecular Sciences, Uppsala BioCenter, Swedish University of Agricultural Sciences and Linnean Center for Plant Biology, PO Box 7015, Uppsala 75007, Sweden
| | - Elena Carneros
- Microbial and Plant Biotechnology Department, Pollen Biotechnology of Crop Plants Laboratory, Margarita Salas Center of Biological Research, CIB Margarita Salas-CSIC, Ramiro de Maeztu 9, Madrid 28040, Spain
| | - Ivett B�r�ny
- Microbial and Plant Biotechnology Department, Pollen Biotechnology of Crop Plants Laboratory, Margarita Salas Center of Biological Research, CIB Margarita Salas-CSIC, Ramiro de Maeztu 9, Madrid 28040, Spain
| | - Peter V Bozhkov
- Department of Molecular Sciences, Uppsala BioCenter, Swedish University of Agricultural Sciences and Linnean Center for Plant Biology, PO Box 7015, Uppsala 75007, Sweden
| | - Pilar S Testillano
- Microbial and Plant Biotechnology Department, Pollen Biotechnology of Crop Plants Laboratory, Margarita Salas Center of Biological Research, CIB Margarita Salas-CSIC, Ramiro de Maeztu 9, Madrid 28040, Spain
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Ibáñez S, Carneros E, Testillano PS, Pérez-Pérez JM. Advances in Plant Regeneration: Shake, Rattle and Roll. PLANTS (BASEL, SWITZERLAND) 2020; 9:E897. [PMID: 32708602 PMCID: PMC7412315 DOI: 10.3390/plants9070897] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Revised: 07/13/2020] [Accepted: 07/14/2020] [Indexed: 01/23/2023]
Abstract
Some plant cells are able to rebuild new organs after tissue damage or in response to definite stress treatments and/or exogenous hormone applications. Whole plants can develop through de novo organogenesis or somatic embryogenesis. Recent findings have enlarged our understanding of the molecular and cellular mechanisms required for tissue reprogramming during plant regeneration. Genetic analyses also suggest the key role of epigenetic regulation during de novo plant organogenesis. A deeper understanding of plant regeneration might help us to enhance tissue culture optimization, with multiple applications in plant micropropagation and green biotechnology. In this review, we will provide additional insights into the physiological and molecular framework of plant regeneration, including both direct and indirect de novo organ formation and somatic embryogenesis, and we will discuss the key role of intrinsic and extrinsic constraints for cell reprogramming during plant regeneration.
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Grants
- BIO2015-64255-R Ministerio de Economía, Industria y Competitividad, Gobierno de España
- RTI2018-096505-B-I00 Ministerio de Economía, Industria y Competitividad, Gobierno de España
- AGL2017-82447-R Ministerio de Economía, Industria y Competitividad, Gobierno de España
- IDIFEDER 2018/016 Conselleria de Cultura, Educación y Ciencia, Generalitat Valenciana
- PROMETEO/2019/117 Conselleria de Cultura, Educación y Ciencia, Generalitat Valenciana
- ACIF/2018/220 Conselleria de Cultura, Educación y Ciencia, Generalitat Valenciana
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Affiliation(s)
- Sergio Ibáñez
- Instituto de Bioingeniería, Universidad Miguel Hernández, 03202 Elche, Spain;
| | - Elena Carneros
- Pollen Biotechnology of Crop Plants Group, Margarita Salas Center of Biological Research, CIB Margarita Salas-CSIC, Ramiro de Maeztu 9, 28040 Madrid, Spain; (E.C.); (P.S.T.)
| | - Pilar S. Testillano
- Pollen Biotechnology of Crop Plants Group, Margarita Salas Center of Biological Research, CIB Margarita Salas-CSIC, Ramiro de Maeztu 9, 28040 Madrid, Spain; (E.C.); (P.S.T.)
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