Meiotic irregularities associated to cytomixis in Buddleja iresinoides (Griseb.) Hosseus. (Buddlejaceae) and Castilleja arvensis Schltdl. & Cham. (Orobanchaceae)
The current paper analyzes the male meiotic behavior in wild populations of Buddleja iresinoides and Castilleja arvensis from Piedmont areas of the Northwest Region of Argentina. Castilleja arvensis showed tetraploid number of chromosome of 2n = 24. Our results are not in agreement with the previous...
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| Format: | Article |
| Language: | English |
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Firenze University Press
2019-12-01
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| Series: | Caryologia |
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| Online Access: | https://riviste.fupress.net/index.php/caryologia/article/view/298 |
| _version_ | 1818759240172437504 |
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| author | Aldo Ruben Andrada Valeria de los Ángeles Páez M.S. Caro P. Kumar |
| author_facet | Aldo Ruben Andrada Valeria de los Ángeles Páez M.S. Caro P. Kumar |
| author_sort | Aldo Ruben Andrada |
| collection | DOAJ |
| description | The current paper analyzes the male meiotic behavior in wild populations of Buddleja iresinoides and Castilleja arvensis from Piedmont areas of the Northwest Region of Argentina. Castilleja arvensis showed tetraploid number of chromosome of 2n = 24. Our results are not in agreement with the previously reported base number x = 19 for Buddleja and the chromosome number n = 28 found for B. iresinoides is atypical in the genus. Around 7 % pollen mother cells were aneuploid as they showed meiotic chromosome count of n = 20-21 bivalents. Possible origin for such atypical chromosome number has been discussed in this paper. During the cytological studies we also came across pollen mother cells showing meiotic abnormalities such as cytomixis, chromatin stickiness and anaphase bridges with lagging chromatin. Consequently microsporogenesis was also irregular showing dyads and triads. However, the percentage of these irregularities during meiosis and microsporogenesis was not higher, and pollen fertility was not affected to a great extent. Cytomixis and other meiotic abnormalities in these species are reported here for the first time. |
| first_indexed | 2024-12-18T06:39:35Z |
| format | Article |
| id | doaj.art-3291194b2a4146fcacf04930897f4b38 |
| institution | Directory Open Access Journal |
| issn | 0008-7114 2165-5391 |
| language | English |
| last_indexed | 2024-12-18T06:39:35Z |
| publishDate | 2019-12-01 |
| publisher | Firenze University Press |
| record_format | Article |
| series | Caryologia |
| spelling | doaj.art-3291194b2a4146fcacf04930897f4b382022-12-21T21:17:41ZengFirenze University PressCaryologia0008-71142165-53912019-12-0172410.13128/caryologia-298Meiotic irregularities associated to cytomixis in Buddleja iresinoides (Griseb.) Hosseus. (Buddlejaceae) and Castilleja arvensis Schltdl. & Cham. (Orobanchaceae)Aldo Ruben Andrada0Valeria de los Ángeles Páez1M.S. Caro2P. Kumar3Fundación Miguel Lillo. Miguel Lillo 251, San Miguel de Tucumán, Tucumán, ArgentinaFundación Miguel Lillo. Miguel Lillo 251, San Miguel de Tucumán, Tucumán, ArgentinaFundación Miguel Lillo. Miguel Lillo 251, San Miguel de Tucumán, Tucumán, ArgentinaBotanical Survey of India, Northern Regional Centre, Dehradun - 248 195, Uttarakhand, IndiaThe current paper analyzes the male meiotic behavior in wild populations of Buddleja iresinoides and Castilleja arvensis from Piedmont areas of the Northwest Region of Argentina. Castilleja arvensis showed tetraploid number of chromosome of 2n = 24. Our results are not in agreement with the previously reported base number x = 19 for Buddleja and the chromosome number n = 28 found for B. iresinoides is atypical in the genus. Around 7 % pollen mother cells were aneuploid as they showed meiotic chromosome count of n = 20-21 bivalents. Possible origin for such atypical chromosome number has been discussed in this paper. During the cytological studies we also came across pollen mother cells showing meiotic abnormalities such as cytomixis, chromatin stickiness and anaphase bridges with lagging chromatin. Consequently microsporogenesis was also irregular showing dyads and triads. However, the percentage of these irregularities during meiosis and microsporogenesis was not higher, and pollen fertility was not affected to a great extent. Cytomixis and other meiotic abnormalities in these species are reported here for the first time.https://riviste.fupress.net/index.php/caryologia/article/view/298Buddleja iresinoidesCastilleja arvensisChromatinpollen mother cellscytomixischromosome numbers |
| spellingShingle | Aldo Ruben Andrada Valeria de los Ángeles Páez M.S. Caro P. Kumar Meiotic irregularities associated to cytomixis in Buddleja iresinoides (Griseb.) Hosseus. (Buddlejaceae) and Castilleja arvensis Schltdl. & Cham. (Orobanchaceae) Caryologia Buddleja iresinoides Castilleja arvensis Chromatin pollen mother cells cytomixis chromosome numbers |
| title | Meiotic irregularities associated to cytomixis in Buddleja iresinoides (Griseb.) Hosseus. (Buddlejaceae) and Castilleja arvensis Schltdl. & Cham. (Orobanchaceae) |
| title_full | Meiotic irregularities associated to cytomixis in Buddleja iresinoides (Griseb.) Hosseus. (Buddlejaceae) and Castilleja arvensis Schltdl. & Cham. (Orobanchaceae) |
| title_fullStr | Meiotic irregularities associated to cytomixis in Buddleja iresinoides (Griseb.) Hosseus. (Buddlejaceae) and Castilleja arvensis Schltdl. & Cham. (Orobanchaceae) |
| title_full_unstemmed | Meiotic irregularities associated to cytomixis in Buddleja iresinoides (Griseb.) Hosseus. (Buddlejaceae) and Castilleja arvensis Schltdl. & Cham. (Orobanchaceae) |
| title_short | Meiotic irregularities associated to cytomixis in Buddleja iresinoides (Griseb.) Hosseus. (Buddlejaceae) and Castilleja arvensis Schltdl. & Cham. (Orobanchaceae) |
| title_sort | meiotic irregularities associated to cytomixis in buddleja iresinoides griseb hosseus buddlejaceae and castilleja arvensis schltdl cham orobanchaceae |
| topic | Buddleja iresinoides Castilleja arvensis Chromatin pollen mother cells cytomixis chromosome numbers |
| url | https://riviste.fupress.net/index.php/caryologia/article/view/298 |
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