The genetic system of Paspalum lilloi (Poaceae), an endemic species from Cataratas del Iguazú
Background and aims: Paspalum lilloi (Poaceae) is a diploid species, endemic of Iguazú Waterfalls and nearby areas. The reproductive biology and current geographical distribution of this species are poorly known. The aims of this work were to determine the genetic system by the analysis of the repro...
Guardado en:
| Autores principales: | , , , , , |
|---|---|
| Formato: | Artículo revista |
| Lenguaje: | Español |
| Publicado: |
Sociedad Argentina de Botánica
2021
|
| Materias: | |
| Acceso en línea: | https://revistas.unc.edu.ar/index.php/BSAB/article/view/33273 |
| Aporte de: |
| id |
I10-R10-article-33273 |
|---|---|
| record_format |
ojs |
| institution |
Universidad Nacional de Córdoba |
| institution_str |
I-10 |
| repository_str |
R-10 |
| container_title_str |
Revistas de la UNC |
| language |
Español |
| format |
Artículo revista |
| topic |
autogamia compatibilidad polen-pistilo endemismo fertilidad Paspalum lilloi polinización heteroespecífica autogamy endemism fertility heterospecific pollination Paspalum lilloi pollen-pistil compatibility |
| spellingShingle |
autogamia compatibilidad polen-pistilo endemismo fertilidad Paspalum lilloi polinización heteroespecífica autogamy endemism fertility heterospecific pollination Paspalum lilloi pollen-pistil compatibility Reutemann, Anna Verena MARTINEZ, ERIC Rua, Gabriel H. SCHEDLER, MARA DAVIÑA, JULIO HONFI, ANA ISABEL The genetic system of Paspalum lilloi (Poaceae), an endemic species from Cataratas del Iguazú |
| topic_facet |
autogamia compatibilidad polen-pistilo endemismo fertilidad Paspalum lilloi polinización heteroespecífica autogamy endemism fertility heterospecific pollination Paspalum lilloi pollen-pistil compatibility |
| author |
Reutemann, Anna Verena MARTINEZ, ERIC Rua, Gabriel H. SCHEDLER, MARA DAVIÑA, JULIO HONFI, ANA ISABEL |
| author_facet |
Reutemann, Anna Verena MARTINEZ, ERIC Rua, Gabriel H. SCHEDLER, MARA DAVIÑA, JULIO HONFI, ANA ISABEL |
| author_sort |
Reutemann, Anna Verena |
| title |
The genetic system of Paspalum lilloi (Poaceae), an endemic species from Cataratas del Iguazú |
| title_short |
The genetic system of Paspalum lilloi (Poaceae), an endemic species from Cataratas del Iguazú |
| title_full |
The genetic system of Paspalum lilloi (Poaceae), an endemic species from Cataratas del Iguazú |
| title_fullStr |
The genetic system of Paspalum lilloi (Poaceae), an endemic species from Cataratas del Iguazú |
| title_full_unstemmed |
The genetic system of Paspalum lilloi (Poaceae), an endemic species from Cataratas del Iguazú |
| title_sort |
genetic system of paspalum lilloi (poaceae), an endemic species from cataratas del iguazú |
| description |
Background and aims: Paspalum lilloi (Poaceae) is a diploid species, endemic of Iguazú Waterfalls and nearby areas. The reproductive biology and current geographical distribution of this species are poorly known. The aims of this work were to determine the genetic system by the analysis of the reproductive mode, pollen-pistil compatibility and fertility, and to delimit the endemism area and conservation status of the species.
M&M: The genetic system was determined by cytoembryological analysis of ovules, viability and in vivo germination of pollen grains, pollen-pistils compatibility, fertility and flow cytometry of single seeds (FCSS). Herbarium specimens and our collection sites delimited the geographical distribution.
Results: Meiotic embryo sacs of Polygonum type were observed in all analyzed ovules. No evidence of apomixis was detected. The mean pollen viability and in vivo pollen germination was 95.2% and 41.8%, respectively. The pollen tube growth in the selfed stigmas was 59.2 ± 6.39 µm / 3h. Seed set in self-pollination was 93.6 % and decreased to 52.7 % when there was heterospecific pollen available. Seeds analyzed by flow cytometric seed screen showed an embryo: endosperm ratio 2:3 indicated a sexual origin. Paspalum lilloi is a reophile and rupicolous species, specialized in fast-moving waters of waterfalls and it is a critically endangered endemism of Iguazu Waterfalls, in South America.
Conclusions: Paspalum lilloi is a species geographically restricted to Iguazu Waterfalls, diploid, sexual, self-compatible and self-fertile. This species has a highly specialized habitat, the conservation of which will be a key step to avoid its extinction. |
| publisher |
Sociedad Argentina de Botánica |
| publishDate |
2021 |
| url |
https://revistas.unc.edu.ar/index.php/BSAB/article/view/33273 |
| work_keys_str_mv |
AT reutemannannaverena thegeneticsystemofpaspalumlilloipoaceaeanendemicspeciesfromcataratasdeliguazu AT martinezeric thegeneticsystemofpaspalumlilloipoaceaeanendemicspeciesfromcataratasdeliguazu AT ruagabrielh thegeneticsystemofpaspalumlilloipoaceaeanendemicspeciesfromcataratasdeliguazu AT schedlermara thegeneticsystemofpaspalumlilloipoaceaeanendemicspeciesfromcataratasdeliguazu AT davinajulio thegeneticsystemofpaspalumlilloipoaceaeanendemicspeciesfromcataratasdeliguazu AT honfianaisabel thegeneticsystemofpaspalumlilloipoaceaeanendemicspeciesfromcataratasdeliguazu AT reutemannannaverena elsistemageneticodepaspalumlilloipoaceaeespecieendemicadelascataratasdeliguazu AT martinezeric elsistemageneticodepaspalumlilloipoaceaeespecieendemicadelascataratasdeliguazu AT ruagabrielh elsistemageneticodepaspalumlilloipoaceaeespecieendemicadelascataratasdeliguazu AT schedlermara elsistemageneticodepaspalumlilloipoaceaeespecieendemicadelascataratasdeliguazu AT davinajulio elsistemageneticodepaspalumlilloipoaceaeespecieendemicadelascataratasdeliguazu AT honfianaisabel elsistemageneticodepaspalumlilloipoaceaeespecieendemicadelascataratasdeliguazu AT reutemannannaverena geneticsystemofpaspalumlilloipoaceaeanendemicspeciesfromcataratasdeliguazu AT martinezeric geneticsystemofpaspalumlilloipoaceaeanendemicspeciesfromcataratasdeliguazu AT ruagabrielh geneticsystemofpaspalumlilloipoaceaeanendemicspeciesfromcataratasdeliguazu AT schedlermara geneticsystemofpaspalumlilloipoaceaeanendemicspeciesfromcataratasdeliguazu AT davinajulio geneticsystemofpaspalumlilloipoaceaeanendemicspeciesfromcataratasdeliguazu AT honfianaisabel geneticsystemofpaspalumlilloipoaceaeanendemicspeciesfromcataratasdeliguazu |
| first_indexed |
2022-08-20T01:21:31Z |
| last_indexed |
2022-08-20T01:21:31Z |
| _version_ |
1770718614479962112 |
| spelling |
I10-R10-article-332732021-11-04T14:07:35Z The genetic system of Paspalum lilloi (Poaceae), an endemic species from Cataratas del Iguazú El sistema genético de Paspalum lilloi (Poaceae), especie endémica de las Cataratas del Iguazú Reutemann, Anna Verena MARTINEZ, ERIC Rua, Gabriel H. SCHEDLER, MARA DAVIÑA, JULIO HONFI, ANA ISABEL autogamia compatibilidad polen-pistilo endemismo fertilidad Paspalum lilloi polinización heteroespecífica autogamy endemism fertility heterospecific pollination Paspalum lilloi pollen-pistil compatibility Background and aims: Paspalum lilloi (Poaceae) is a diploid species, endemic of Iguazú Waterfalls and nearby areas. The reproductive biology and current geographical distribution of this species are poorly known. The aims of this work were to determine the genetic system by the analysis of the reproductive mode, pollen-pistil compatibility and fertility, and to delimit the endemism area and conservation status of the species. M&M: The genetic system was determined by cytoembryological analysis of ovules, viability and in vivo germination of pollen grains, pollen-pistils compatibility, fertility and flow cytometry of single seeds (FCSS). Herbarium specimens and our collection sites delimited the geographical distribution. Results: Meiotic embryo sacs of Polygonum type were observed in all analyzed ovules. No evidence of apomixis was detected. The mean pollen viability and in vivo pollen germination was 95.2% and 41.8%, respectively. The pollen tube growth in the selfed stigmas was 59.2 ± 6.39 µm / 3h. Seed set in self-pollination was 93.6 % and decreased to 52.7 % when there was heterospecific pollen available. Seeds analyzed by flow cytometric seed screen showed an embryo: endosperm ratio 2:3 indicated a sexual origin. Paspalum lilloi is a reophile and rupicolous species, specialized in fast-moving waters of waterfalls and it is a critically endangered endemism of Iguazu Waterfalls, in South America. Conclusions: Paspalum lilloi is a species geographically restricted to Iguazu Waterfalls, diploid, sexual, self-compatible and self-fertile. This species has a highly specialized habitat, the conservation of which will be a key step to avoid its extinction. Introducción y objetivos: Paspalum lilloi (Poaceae) es una especie diploide y endémica de las Cataratas del Iguazú y áreas circundantes, cuya biología reproductiva y área de distribución geográfica actual es desconocida. Los objetivos de este trabajo son conocer su sistema genético, mediante análisis del modo reproductivo, compatibilidad polen-pistilo y fertilidad, y delimitar la distribución y estado de conservación del endemismo. M&M: El sistema genético se determinó mediante citoembriología de sacos embrionarios, viabilidad y germinación in vivo de granos de polen, compatibilidad polen-pistilo, fertilidad y análisis de semillas por citometría de flujo. El área de distribución geográfica se delimitó mediante especímenes de herbario y colecciones propias. Resultados: Se observaron sacos embrionarios meióticos de tipo Polygonum en todos los óvulos analizados. La viabilidad media y germinación in vivo del polen fue de 95,22% y 41,79%, respectivamente. La tasa de crecimiento medio del tubo polínico en el estigma propio fue de 59,2 ± 6,39 µm / 3h. La producción de semillas en autopolinización fue del 93,61% y disminuyó al 52,72% cuando hay oferta de polen heteroespecífico. Los cariopsis analizados por citometría de flujo mostraron una relación de ploidía embrión: endospermo 2: 3, indicando un origen sexual. Paspalum lilloi es una especie reófila, rupícola y adaptada a saltos y cascadas, cuyo endemismo está en peligro crítico y circunscripto a las Cataratas del Iguazú. Conclusiones: Paspalum lilloi es diploide, sexual, autocompatible y autofértil, está geográficamente restringida a las Cataratas del Iguazú y adaptada a hábitats altamente especializados, cuya conservación resultará clave para evitar su extinción. Sociedad Argentina de Botánica 2021-09-07 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf text/html https://revistas.unc.edu.ar/index.php/BSAB/article/view/33273 Boletín de la Sociedad Argentina de Botánica (Journal of the Argentine Botanical Society; Vol. 56 No. 3 (2021): September Boletín de la Sociedad Argentina de Botánica; Vol. 56 Núm. 3 (2021): Septiembre Boletín de la Sociedad Argentina de Botánica; v. 56 n. 3 (2021): Septiembre 1851-2372 0373-580X 10.31055/1851.2372.v56.n3 spa https://revistas.unc.edu.ar/index.php/BSAB/article/view/33273/35167 https://revistas.unc.edu.ar/index.php/BSAB/article/view/33273/35168 Derechos de autor 2021 Anna Verena Reutemann, Eric J. Martínez, Gabriel H. Rua, Mara Schedler, Julio R. Daviña, Ana I. Honfi https://creativecommons.org/licenses/by-nc-nd/4.0 |