Emergence of Corona Is Independent of the Four Whorls of Floral Organs in <i>Narcissus tazetta</i>
Plants of the genus <i>Narcissus</i> are well-known for their characteristic corona morphology, which structural origins have been a bone of contention among scholars. With “Jinzhanyintai” (JZ) and “Yulinglong” (YLL)—two major close-originated cultivars of Chinese narcissus (<i>Nar...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-03-01
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| Series: | Plants |
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| Online Access: | https://www.mdpi.com/2223-7747/12/7/1458 |
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| author | Yanjun Ma Xiaomeng Hu Keke Fan Na Zhang Lili Shang Yayun Deng Tao Hu Wenbo Zhang Yan Wang Zehui Jiang |
| author_facet | Yanjun Ma Xiaomeng Hu Keke Fan Na Zhang Lili Shang Yayun Deng Tao Hu Wenbo Zhang Yan Wang Zehui Jiang |
| author_sort | Yanjun Ma |
| collection | DOAJ |
| description | Plants of the genus <i>Narcissus</i> are well-known for their characteristic corona morphology, which structural origins have been a bone of contention among scholars. With “Jinzhanyintai” (JZ) and “Yulinglong” (YLL)—two major close-originated cultivars of Chinese narcissus (<i>Narcissus tazetta</i> L. var. <i>chinensis</i> Roem)—as materials, anatomic observation was made on floral organs during corona morphogenesis by dissection with hands under a stereomicroscope, paraffin section, scanning electron microscopy, and high-resolution X-ray tomography. It was uncovered that corona primordia of both cultivars appeared following the end of the differentiation of other floral organs, with differentiation sites located at the inner wall of the juncture of the base of tepals and the upper margin of the hypanthium. Affected by staminal filaments, the corona primordia of JZ experienced a three-stage differentiation process, namely blockage from the second whorl of stamens, blockage from the first whorl of stamens, and healing of corona primordia. However, the expanded spatial structure of the first whorl of petal-like stamens blocked the path of differentiation of YLL corona primordia, giving rise to slow differentiation of the corona primordia at the base of the first whorl of petal-like stamens and malformed differentiation of the corona primordia in the interval between the two whorls of petal-like stamens. Thus, a fragmented structure consisting of typical and fragmented coronas was formed. Furthermore, petal-like stamens of YLL in the lower part had a corona-like morphology. The spatio-temporal specificity of corona differentiation convincingly demonstrates that the corona is a structure independent of and different from the typical four whorls of floral organs, but also highly correlated with stamen. |
| first_indexed | 2024-03-11T05:27:30Z |
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| id | doaj.art-2ac3915ed365458083cfb682f7fca6a4 |
| institution | Directory Open Access Journal |
| issn | 2223-7747 |
| language | English |
| last_indexed | 2024-03-11T05:27:30Z |
| publishDate | 2023-03-01 |
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| record_format | Article |
| series | Plants |
| spelling | doaj.art-2ac3915ed365458083cfb682f7fca6a42023-11-17T17:22:50ZengMDPI AGPlants2223-77472023-03-01127145810.3390/plants12071458Emergence of Corona Is Independent of the Four Whorls of Floral Organs in <i>Narcissus tazetta</i>Yanjun Ma0Xiaomeng Hu1Keke Fan2Na Zhang3Lili Shang4Yayun Deng5Tao Hu6Wenbo Zhang7Yan Wang8Zehui Jiang9International Center for Bamboo and Rattan, Beijing 100102, ChinaInternational Center for Bamboo and Rattan, Beijing 100102, ChinaInternational Center for Bamboo and Rattan, Beijing 100102, ChinaInternational Center for Bamboo and Rattan, Beijing 100102, ChinaInternational Center for Bamboo and Rattan, Beijing 100102, ChinaInternational Center for Bamboo and Rattan, Beijing 100102, ChinaInternational Center for Bamboo and Rattan, Beijing 100102, ChinaInternational Center for Bamboo and Rattan, Beijing 100102, ChinaChinese Academy of Forestry Research Institute of Forestry, Beijing 100091, ChinaInternational Center for Bamboo and Rattan, Beijing 100102, ChinaPlants of the genus <i>Narcissus</i> are well-known for their characteristic corona morphology, which structural origins have been a bone of contention among scholars. With “Jinzhanyintai” (JZ) and “Yulinglong” (YLL)—two major close-originated cultivars of Chinese narcissus (<i>Narcissus tazetta</i> L. var. <i>chinensis</i> Roem)—as materials, anatomic observation was made on floral organs during corona morphogenesis by dissection with hands under a stereomicroscope, paraffin section, scanning electron microscopy, and high-resolution X-ray tomography. It was uncovered that corona primordia of both cultivars appeared following the end of the differentiation of other floral organs, with differentiation sites located at the inner wall of the juncture of the base of tepals and the upper margin of the hypanthium. Affected by staminal filaments, the corona primordia of JZ experienced a three-stage differentiation process, namely blockage from the second whorl of stamens, blockage from the first whorl of stamens, and healing of corona primordia. However, the expanded spatial structure of the first whorl of petal-like stamens blocked the path of differentiation of YLL corona primordia, giving rise to slow differentiation of the corona primordia at the base of the first whorl of petal-like stamens and malformed differentiation of the corona primordia in the interval between the two whorls of petal-like stamens. Thus, a fragmented structure consisting of typical and fragmented coronas was formed. Furthermore, petal-like stamens of YLL in the lower part had a corona-like morphology. The spatio-temporal specificity of corona differentiation convincingly demonstrates that the corona is a structure independent of and different from the typical four whorls of floral organs, but also highly correlated with stamen.https://www.mdpi.com/2223-7747/12/7/1458Chinese narcissusJinzhanyintaiYulinglongstamen petalodycoronamorphogenesis |
| spellingShingle | Yanjun Ma Xiaomeng Hu Keke Fan Na Zhang Lili Shang Yayun Deng Tao Hu Wenbo Zhang Yan Wang Zehui Jiang Emergence of Corona Is Independent of the Four Whorls of Floral Organs in <i>Narcissus tazetta</i> Plants Chinese narcissus Jinzhanyintai Yulinglong stamen petalody corona morphogenesis |
| title | Emergence of Corona Is Independent of the Four Whorls of Floral Organs in <i>Narcissus tazetta</i> |
| title_full | Emergence of Corona Is Independent of the Four Whorls of Floral Organs in <i>Narcissus tazetta</i> |
| title_fullStr | Emergence of Corona Is Independent of the Four Whorls of Floral Organs in <i>Narcissus tazetta</i> |
| title_full_unstemmed | Emergence of Corona Is Independent of the Four Whorls of Floral Organs in <i>Narcissus tazetta</i> |
| title_short | Emergence of Corona Is Independent of the Four Whorls of Floral Organs in <i>Narcissus tazetta</i> |
| title_sort | emergence of corona is independent of the four whorls of floral organs in i narcissus tazetta i |
| topic | Chinese narcissus Jinzhanyintai Yulinglong stamen petalody corona morphogenesis |
| url | https://www.mdpi.com/2223-7747/12/7/1458 |
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