Evaluación de parámetros reproductivos en las especies Sarcocapnos integrifolia (Boiss.) Cuatrec. y Sarcocapnos baetica (Boiss. & Reut.) Nyman: estudio de la variación intra e interpoblacional de la productividad y viabilidad polínica.
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2024-09-19
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Jaén: Universidad de Jaén
Resumen
[ES] La comunidad autónoma de Andalucía, alberga una gran variedad de endemismos vegetales debido a su
diversidad de hábitats, encontrándose muchas de estas especies en peligro, dado las escasas localidades donde
se ubican, sumado a otras amenazas y presiones. Por ello, este trabajo de investigación se centra en las especies
endémicas Sarcocapnos integrifolia (Boiss.) Cuatrec. y Sarcocapnos baetica (Boiss. & Reut.) Nyman, ambas
amenazadas y presentes en la provincia de Jaén, para evaluar aspectos importantes de su biología reproductiva,
como lo son productividad y viabilidad del polen. Para alcanzar este objetivo se emplearon diversas técnicas,
incluyendo el test de cloruro de tetrazolio (TTC), tinción de Alexander y determinación de relación polen/ovulo
(P/O). Los resultados revelaron que S. integrifolia presenta una menor cantidad de polen por flor, así como una
menor viabilidad y estabilidad del polen a lo largo del tiempo, en contraposición a una mayor viabilidad y
productividad polínica de S. baetica.
[EN] The autonomous community of Andalusia is home to a great variety of endemic plants due to its diversity of habitats, and many of these species are endangered, given the scarce localities where they are located, in addition to other threats and pressures. Therefore, this research work focuses on the endemic species Sarcocapnos integrifolia (Boiss.) Cuatrec. and Sarcocapnos baetica (Boiss. & Reut.) Nyman, both endangered and present in the province of Jaén, to evaluate important aspects of their reproductive biology, such as pollen productivity and viability. To achieve this objective, several techniques were used, including the tetrazolium chloride test (TTC), the Alexander staining and determination of pollen/ovule (P/O) ratio. The results revealed that S. integrifolia has a lower amount of pollen per flower, as well as a lower viability and pollen stability over time, in contrast to the higher viability and pollen productivity of S. baetica.
[EN] The autonomous community of Andalusia is home to a great variety of endemic plants due to its diversity of habitats, and many of these species are endangered, given the scarce localities where they are located, in addition to other threats and pressures. Therefore, this research work focuses on the endemic species Sarcocapnos integrifolia (Boiss.) Cuatrec. and Sarcocapnos baetica (Boiss. & Reut.) Nyman, both endangered and present in the province of Jaén, to evaluate important aspects of their reproductive biology, such as pollen productivity and viability. To achieve this objective, several techniques were used, including the tetrazolium chloride test (TTC), the Alexander staining and determination of pollen/ovule (P/O) ratio. The results revealed that S. integrifolia has a lower amount of pollen per flower, as well as a lower viability and pollen stability over time, in contrast to the higher viability and pollen productivity of S. baetica.