Reproductive biology in cassava: stigma receptivity and pollen tube growth
Knowledge on the reproductive biology of cassava, relevant to breeders and molecular geneticists, is still limited. Therefore, different studies were carried out to determine the duration of stigma receptivity and the rate of pollen tube growth. Inflorescences were covered for up to 3 days after the...
| Autores principales: | , , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
Informa UK Limited
2019
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/101956 |
| _version_ | 1855513464440619008 |
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| author | Ramos Abril, Lisette Natalia Pineda, Marcela Wasek, I. Wedzony, Maria Ceballos, Hernán |
| author_browse | Ceballos, Hernán Pineda, Marcela Ramos Abril, Lisette Natalia Wasek, I. Wedzony, Maria |
| author_facet | Ramos Abril, Lisette Natalia Pineda, Marcela Wasek, I. Wedzony, Maria Ceballos, Hernán |
| author_sort | Ramos Abril, Lisette Natalia |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Knowledge on the reproductive biology of cassava, relevant to breeders and molecular geneticists, is still limited. Therefore, different studies were carried out to determine the duration of stigma receptivity and the rate of pollen tube growth. Inflorescences were covered for up to 3 days after the first opening of the bracts (e.g. anthesis day) to prevent open pollination. Results indicate that fruit and seed set are drastically reduced when flowers were covered for 2 or 3 days. However, fruits and seeds were obtained even from flowers that had been covered for 3 days after anthesis, although at low frequency. The rate of pollen tube growth was assessed in many combinations of female and male progenitors crossed through controlled pollinations and collecting the pistils at varying hours after pollination (HAP). Pollen tube growth is fast during the first 6 HAP reaching the tip of the nucellar beak. The growth slows down thereafter, taking 10 additional hours to reach the end of the beak. The growth of pollen tubes slows down even further until they enter the embryo sac. Only 10% of samples showed pollen tubes entering the embryo sac between 48 and 66 HAP. Although several tubes may reach the nucellar beak, only one was observed entering the embryo sac. Results, across the different experiments, were highly variable suggesting that the timeline of fertilization is influenced both by genotypic and environmental factors as well as the manual manipulation of inflorescences and cyathia. |
| format | Journal Article |
| id | CGSpace101956 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2019 |
| publishDateRange | 2019 |
| publishDateSort | 2019 |
| publisher | Informa UK Limited |
| publisherStr | Informa UK Limited |
| record_format | dspace |
| spelling | CGSpace1019562025-03-13T09:43:57Z Reproductive biology in cassava: stigma receptivity and pollen tube growth Ramos Abril, Lisette Natalia Pineda, Marcela Wasek, I. Wedzony, Maria Ceballos, Hernán manihot esculenta cassava Knowledge on the reproductive biology of cassava, relevant to breeders and molecular geneticists, is still limited. Therefore, different studies were carried out to determine the duration of stigma receptivity and the rate of pollen tube growth. Inflorescences were covered for up to 3 days after the first opening of the bracts (e.g. anthesis day) to prevent open pollination. Results indicate that fruit and seed set are drastically reduced when flowers were covered for 2 or 3 days. However, fruits and seeds were obtained even from flowers that had been covered for 3 days after anthesis, although at low frequency. The rate of pollen tube growth was assessed in many combinations of female and male progenitors crossed through controlled pollinations and collecting the pistils at varying hours after pollination (HAP). Pollen tube growth is fast during the first 6 HAP reaching the tip of the nucellar beak. The growth slows down thereafter, taking 10 additional hours to reach the end of the beak. The growth of pollen tubes slows down even further until they enter the embryo sac. Only 10% of samples showed pollen tubes entering the embryo sac between 48 and 66 HAP. Although several tubes may reach the nucellar beak, only one was observed entering the embryo sac. Results, across the different experiments, were highly variable suggesting that the timeline of fertilization is influenced both by genotypic and environmental factors as well as the manual manipulation of inflorescences and cyathia. 2019-01-01 2019-06-28T20:17:01Z 2019-06-28T20:17:01Z Journal Article https://hdl.handle.net/10568/101956 en Open Access Informa UK Limited Ramos Abril, Lizzeth N.; Pineda, Lizzeth M.; Wasek, I.; Wedzony, M. & Ceballos, Hernan (2019). Reproductive biology in cassava: stigma receptivity and pollen tube growth. Communicative & Integrative Biology, 12(1): 96-111 |
| spellingShingle | manihot esculenta cassava Ramos Abril, Lisette Natalia Pineda, Marcela Wasek, I. Wedzony, Maria Ceballos, Hernán Reproductive biology in cassava: stigma receptivity and pollen tube growth |
| title | Reproductive biology in cassava: stigma receptivity and pollen tube growth |
| title_full | Reproductive biology in cassava: stigma receptivity and pollen tube growth |
| title_fullStr | Reproductive biology in cassava: stigma receptivity and pollen tube growth |
| title_full_unstemmed | Reproductive biology in cassava: stigma receptivity and pollen tube growth |
| title_short | Reproductive biology in cassava: stigma receptivity and pollen tube growth |
| title_sort | reproductive biology in cassava stigma receptivity and pollen tube growth |
| topic | manihot esculenta cassava |
| url | https://hdl.handle.net/10568/101956 |
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