Variation in Thickness of Embryo Covering Structures and Their Role in the Regulation of Seed Physiological Dormancy of Chenopodium hircinum (Amaranthaceae)
Chenopodium hircinum, the putative wild ancestor of quinoa, is a source of traits that could improve the tolerance of crop quinoa to high temperatures. However, seeds of C. hircinum have physiological dormancy (PD), which is an obstacle for plant propagation and use in breeding programs. We studied...
| Autores principales: | , , , , , , , |
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| Formato: | Artículo |
| Lenguaje: | Inglés |
| Publicado: |
MDPI
2025
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| Materias: | |
| Acceso en línea: | http://hdl.handle.net/20.500.12123/21803 https://www.mdpi.com/2223-7747/13/19/2832 https://doi.org/10.3390/plants13192832 |
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| author | Agüero Martínez, Paola Fernanda Cardozo, Leonardo Gómez, Carlos A. Lopez Spahr, Diego Baskin, Carol C. Bertero, Héctor Daniel Galindez, Guadalupe Curti, Ramiro Nestor |
| author_browse | Agüero Martínez, Paola Fernanda Baskin, Carol C. Bertero, Héctor Daniel Cardozo, Leonardo Curti, Ramiro Nestor Galindez, Guadalupe Gómez, Carlos A. Lopez Spahr, Diego |
| author_facet | Agüero Martínez, Paola Fernanda Cardozo, Leonardo Gómez, Carlos A. Lopez Spahr, Diego Baskin, Carol C. Bertero, Héctor Daniel Galindez, Guadalupe Curti, Ramiro Nestor |
| author_sort | Agüero Martínez, Paola Fernanda |
| collection | INTA Digital |
| description | Chenopodium hircinum, the putative wild ancestor of quinoa, is a source of traits that could improve the tolerance of crop quinoa to high temperatures. However, seeds of C. hircinum have physiological dormancy (PD), which is an obstacle for plant propagation and use in breeding programs. We studied the intraspecific variability in morpho-anatomical traits of embryo covering structures and their association with PD. We also evaluated the effects of different dormancy-breaking treatments on PD alleviation and germination. Seeds were dispersed with a remnant perianth and a persistent pericarp that could be removed by scraping. The seed coat was formed by palisade cells impregnated with tannins, and the seed contained a thin layer of peripheral endosperm surrounding the embryo. In our investigation, the thickness of the pericarp (P) and/or seed coat (SC) varied among populations. Populations with higher P and/or SC thickness showed lower percentages of germination and water absorption. The combined dormancy-breaking treatment (bleach + perforated coverings + gibberellic acid) promoted dormancy release and increased germination. C. hircinum seeds showed non-deep physiological dormancy. Based on previous knowledge about quinoa, and our results, we conclude that embryo coverings, especially the seed coat, have an important role in dormancy control, imposing a mechanical restraint on radicle emergence. |
| format | Artículo |
| id | INTA21803 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2025 |
| publishDateRange | 2025 |
| publishDateSort | 2025 |
| publisher | MDPI |
| publisherStr | MDPI |
| record_format | dspace |
| spelling | INTA218032025-03-25T12:35:28Z Variation in Thickness of Embryo Covering Structures and Their Role in the Regulation of Seed Physiological Dormancy of Chenopodium hircinum (Amaranthaceae) Agüero Martínez, Paola Fernanda Cardozo, Leonardo Gómez, Carlos A. Lopez Spahr, Diego Baskin, Carol C. Bertero, Héctor Daniel Galindez, Guadalupe Curti, Ramiro Nestor Chenopodium Amaranthaceae Physiological Dormancy Seed Traits Plant Domestication Intraspecific Relationships Testa Germination Latencia Fisiológica Rasgos de la Semilla Domesticación de Plantas Relación Intraespecífica Germinación Chenopodium hircinum Chenopodium hircinum, the putative wild ancestor of quinoa, is a source of traits that could improve the tolerance of crop quinoa to high temperatures. However, seeds of C. hircinum have physiological dormancy (PD), which is an obstacle for plant propagation and use in breeding programs. We studied the intraspecific variability in morpho-anatomical traits of embryo covering structures and their association with PD. We also evaluated the effects of different dormancy-breaking treatments on PD alleviation and germination. Seeds were dispersed with a remnant perianth and a persistent pericarp that could be removed by scraping. The seed coat was formed by palisade cells impregnated with tannins, and the seed contained a thin layer of peripheral endosperm surrounding the embryo. In our investigation, the thickness of the pericarp (P) and/or seed coat (SC) varied among populations. Populations with higher P and/or SC thickness showed lower percentages of germination and water absorption. The combined dormancy-breaking treatment (bleach + perforated coverings + gibberellic acid) promoted dormancy release and increased germination. C. hircinum seeds showed non-deep physiological dormancy. Based on previous knowledge about quinoa, and our results, we conclude that embryo coverings, especially the seed coat, have an important role in dormancy control, imposing a mechanical restraint on radicle emergence. EEA Salta Fil: Agüero Martínez, Paola Fernanda. Universidad Nacional de Salta. Facultad de Ciencias Naturales; Argentina Fil: Cardozo, Leonardo. Universidad Nacional de Salta. Facultad de Ciencias Naturales; Argentina Fil: Gomez, Carlos Alberto. Universidad Nacional de Salta. Facultad de Ciencias Naturales; Argentina. Fil: Gomez, Carlos Alberto. Concejo Nacional de Investigaciones Científicas y Técnicas. CCT Salta. Laboratorio de Microscopía Electrónica de Barrido; Argentina. Fil: Gomez, Carlos Alberto. Universidad Nacional de Salta. Laboratorio de Microscopía Electrónica de Barrido; Argentina Fil: López Spahr, Diego. Universidad Nacional de Salta. Facultad de Ciencias Naturales; Argentina Fil: López Spahr, Diego. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Salta; Argentina Fil: Baskin, Carol C. University of Kentucky. Department of Biology and Department of Plant and Soil Sciences; Estados Unidos Fil: Bertero, Hector Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; Argentina Fil: Bertero, Hector Daniel. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; Argentina Fil: Bertero, Hector Daniel. Universidad de Buenos Aires. Facultad de Agronomía. Cátedra de Producción Vegetal; Argentina Fil: Galindez, Guadalupe. Universidad Nacional de Salta. Facultad de Ciencias Naturales; Argentina Fil: Galindez, Guadalupe. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico (CCT)-Salta-Jujuy; Argentina. Fil: Curti, Ramiro Nestor. Universidad Nacional de Salta. Facultad de Ciencias Naturales; Argentina Fil: Curti, Ramiro Nestor. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico (CCT)-Salta-Jujuy; Argentina. 2025-03-25T12:32:20Z 2025-03-25T12:32:20Z 2024-10 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/21803 https://www.mdpi.com/2223-7747/13/19/2832 2223-7747 https://doi.org/10.3390/plants13192832 eng info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf MDPI Plants 13 (19) : 2832. (October 2024) |
| spellingShingle | Chenopodium Amaranthaceae Physiological Dormancy Seed Traits Plant Domestication Intraspecific Relationships Testa Germination Latencia Fisiológica Rasgos de la Semilla Domesticación de Plantas Relación Intraespecífica Germinación Chenopodium hircinum Agüero Martínez, Paola Fernanda Cardozo, Leonardo Gómez, Carlos A. Lopez Spahr, Diego Baskin, Carol C. Bertero, Héctor Daniel Galindez, Guadalupe Curti, Ramiro Nestor Variation in Thickness of Embryo Covering Structures and Their Role in the Regulation of Seed Physiological Dormancy of Chenopodium hircinum (Amaranthaceae) |
| title | Variation in Thickness of Embryo Covering Structures and Their Role in the Regulation of Seed Physiological Dormancy of Chenopodium hircinum (Amaranthaceae) |
| title_full | Variation in Thickness of Embryo Covering Structures and Their Role in the Regulation of Seed Physiological Dormancy of Chenopodium hircinum (Amaranthaceae) |
| title_fullStr | Variation in Thickness of Embryo Covering Structures and Their Role in the Regulation of Seed Physiological Dormancy of Chenopodium hircinum (Amaranthaceae) |
| title_full_unstemmed | Variation in Thickness of Embryo Covering Structures and Their Role in the Regulation of Seed Physiological Dormancy of Chenopodium hircinum (Amaranthaceae) |
| title_short | Variation in Thickness of Embryo Covering Structures and Their Role in the Regulation of Seed Physiological Dormancy of Chenopodium hircinum (Amaranthaceae) |
| title_sort | variation in thickness of embryo covering structures and their role in the regulation of seed physiological dormancy of chenopodium hircinum amaranthaceae |
| topic | Chenopodium Amaranthaceae Physiological Dormancy Seed Traits Plant Domestication Intraspecific Relationships Testa Germination Latencia Fisiológica Rasgos de la Semilla Domesticación de Plantas Relación Intraespecífica Germinación Chenopodium hircinum |
| url | http://hdl.handle.net/20.500.12123/21803 https://www.mdpi.com/2223-7747/13/19/2832 https://doi.org/10.3390/plants13192832 |
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