Karyomorphology of three endemic plants (Brassicaceae: Euclidieae and Arabideae) from the Qinghai-Tibet Plateau and its significance

doi:10.1016/j.pld.2020.03.002

Plant Diversity ›› 2020, Vol. 42 ›› Issue (03): 135-141.DOI: 10.1016/j.pld.2020.03.002

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Karyomorphology of three endemic plants (Brassicaceae: Euclidieae and Arabideae) from the Qinghai-Tibet Plateau and its significance

Wenguang Sun^a,b,c, Haixia Wang^b, Rui Wu^b, Hang Sun^a, Zhimin Li^b

a CAS Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China;
b School of Life Science, Engineering Research Center of Sustainable Development and Utilization of Biomass Energy, Yunnan Normal University, Kunming 650500, China;
c University of the Chinese Academy of Sciences, Beijing 100049, China

Received:2019-08-06 Revised:2020-03-06 Online:2020-07-15 Published:2020-06-25
Contact: Hang Sun, Zhimin Li
Supported by:
We are grateful to Dr Hong-Liang Chen and Dr Ji-Pei Yue for providing the seed materials and taking the photographs of plants. This work was supported by grants from the National Natural Science Foundation of China (grant numbers 31960046 and 31670206 to Z.-M.L.), Strategic Priority Research Program of Chinese Academy of Sciences, China (grant number XDA 20050203 to H.S.), and Key Projects of the Joint Fund of the National Natural Science Foundation of China (grant number U1802232 to H.S.). We also acknowledge TopEdit LLC for the linguistic editing and proofreading during the preparation of this manuscript.

Karyomorphology of three endemic plants (Brassicaceae: Euclidieae and Arabideae) from the Qinghai-Tibet Plateau and its significance

Wenguang Sun^a,b,c, Haixia Wang^b, Rui Wu^b, Hang Sun^a, Zhimin Li^b

a CAS Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China;
b School of Life Science, Engineering Research Center of Sustainable Development and Utilization of Biomass Energy, Yunnan Normal University, Kunming 650500, China;
c University of the Chinese Academy of Sciences, Beijing 100049, China

通讯作者: Hang Sun, Zhimin Li
基金资助:
We are grateful to Dr Hong-Liang Chen and Dr Ji-Pei Yue for providing the seed materials and taking the photographs of plants. This work was supported by grants from the National Natural Science Foundation of China (grant numbers 31960046 and 31670206 to Z.-M.L.), Strategic Priority Research Program of Chinese Academy of Sciences, China (grant number XDA 20050203 to H.S.), and Key Projects of the Joint Fund of the National Natural Science Foundation of China (grant number U1802232 to H.S.). We also acknowledge TopEdit LLC for the linguistic editing and proofreading during the preparation of this manuscript.

Abstract

Abstract: In the paper, chromosome number and karyotype of three endemic genera from China are reported for the first time. Our results show that Anzhengxia yechengnica has a karyotype formula 2n=2x=14=6 m+8sm and belongs to Stebbins-3A; Shangrilaia nana karyotype formula is 2n=2x=14=10 m+4sm (2sat) and belongs to Stebbins-1A; Baimashania pulvinata karyotype formula is 2n=2x=16=12 m (2sat)+4sm and belongs to Stebbins-1A. Anzhengxia and Shangrilaia are monospecific genera belonging to tribe Euclidieae and both have a basic chromosome x=7. Baimashania, which belongs to tribe Arabideae, has two species which have a basic chromosome x=8. The implications of these cytological data are compared with morphological support and the implications for each tribe are discussed. We also summarize chromosomal number variation and its systematic implications of two tribes from the Qinghai-Tibet Plateau.

Key words: Karyotype, Endemic species, Anzhengxia, Shangrilaia, Baimashania, Qinghai-Tibet Plateau

摘要： In the paper, chromosome number and karyotype of three endemic genera from China are reported for the first time. Our results show that Anzhengxia yechengnica has a karyotype formula 2n=2x=14=6 m+8sm and belongs to Stebbins-3A; Shangrilaia nana karyotype formula is 2n=2x=14=10 m+4sm (2sat) and belongs to Stebbins-1A; Baimashania pulvinata karyotype formula is 2n=2x=16=12 m (2sat)+4sm and belongs to Stebbins-1A. Anzhengxia and Shangrilaia are monospecific genera belonging to tribe Euclidieae and both have a basic chromosome x=7. Baimashania, which belongs to tribe Arabideae, has two species which have a basic chromosome x=8. The implications of these cytological data are compared with morphological support and the implications for each tribe are discussed. We also summarize chromosomal number variation and its systematic implications of two tribes from the Qinghai-Tibet Plateau.

关键词: Karyotype, Endemic species, Anzhengxia, Shangrilaia, Baimashania, Qinghai-Tibet Plateau

Wenguang Sun, Haixia Wang, Rui Wu, Hang Sun, Zhimin Li. Karyomorphology of three endemic plants (Brassicaceae: Euclidieae and Arabideae) from the Qinghai-Tibet Plateau and its significance[J]. Plant Diversity, 2020, 42(03): 135-141.

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Karyomorphology of three endemic plants (Brassicaceae: Euclidieae and Arabideae) from the Qinghai-Tibet Plateau and its significance

Karyomorphology of three endemic plants (Brassicaceae: Euclidieae and Arabideae) from the Qinghai-Tibet Plateau and its significance

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