Karyomorphology of four species in Ancylostemon, Briggsiopsis and Lysionotus (Gesneriaceae)

Previous Articles Next Articles

Karyomorphology of four species in Ancylostemon, Briggsiopsis and Lysionotus (Gesneriaceae)

WANG Yin-Zheng, GU Zhi-Jian

Received:1900-01-01 Revised:1900-01-01 Online:1999-03-10 Published:1999-03-10
Contact: WANG Yin-Zheng

Abstract

Abstract:

Reported in the present paper are chromosome numbers and karyotypes of three

genera of the Gesneriaceae, i.e. Ancylostemon Craib. , Briggsiopsis (Franch.) K. Y. Pan

and Lysionotus D. Don. The former two genera are endemic to China. The karyotype of

Ancylostemon aureus (Franch.) Burtt is formulated as 2n = 34 = 20m(1sat) + 14sm, with

the same chromosome number as its allied species A. convexus Craib. This species is charac-

terized by the interphase nucleus of complex chromocenter type and the proximal type of

chromosomes in the mitotic prophase. The chromosome number of the monospecific genus

Briggsiopsis is 2n = 34, the same as the lowest chromosome number reported in Briggsia.

The karyotype of Briggsiopsis, which is formulated as 2n = 25m + 6sm + 3st, also seems to

be primitive among the species of the two genera. Briggsiopsis is characterized by the inter-

phase nucleus of simple-complex chromocenter type and the interstitial-gradient type of chro-

mosomes in the mitotic prophase. The chromosome number of Lysionotus carnosus Hemsl. is

the lowest reported in this genus. Its karyotype is formulated as 2n= 30 = 21m + 5sm + 3st

+ lt. Lysionotus serratus var. pterocaulis, with the karyotype being formulated as 2n= 32

= 2lm + 10sm + lt, has the same chromosome number as var. serratus. These two species

show a remarkable differentiation of karyotypes and are characterized by the interphase nuclei

of simple-complex chromocenter type and the gradient type of chromosomes in the mitotic

prophase. _ .

Key words: Karyomorphology, Ancylostermon, Briggsiopsis, Lysionotus, Gesneriaceae

WANG Yin-Zheng, GU Zhi-Jian. Karyomorphology of four species in Ancylostemon, Briggsiopsis and Lysionotus (Gesneriaceae)[J]. .

[1]	MENG Ai-Ping, WANG Heng-Chang, LI Jian-Qiang, SIMA Yong-Kang. A karyomorphological study of 40 species in 11 genera of the Magnoliaceae from China [J]. , 2006, 23(1): 4-6.
[2]	WEI Yi-Gang, FANG Ding. A new species of Chirita Buch.-Ham. ex D. Don (Gesneriaceae) from Guangxi, China [J]. , 2001, 39(5): 467-470.
[3]	ZHOU Qi-Xing, GU Zhi-Jian, YUE Zhong-Shu. Karyomorphology and relationships of Amentotaxus Pilg. [J]. , 2000, 38(6): 522-527.
[4]	LIU Jian-Quan, HO Ting-Nong, LIU Shang-Wu. Systematic position of Nannoglottis Maxim. s.l. (Asteraceae): karyomorphological data [J]. , 2000, 38(3): 236-241.
[5]	WEI Yi-Gang, WEN He-Qun, ZHONG Shu-Hua. New materials of Gesneriaceae from Guangxi, China [J]. , 2000, 38(3): 297-301.
[6]	WANG Yin-Zheng. The growth pattern of shoots in Whytockia (Gesneriaceae) with phylogenetic implications [J]. , 2000, 38(3): 231-235.
[7]	YANG Qin-Er. Karyomorphology of four species in Cimicifuga (Ranunculaceae) from China, with some cytogeographical notes on C. foetida [J]. , 1999, 37(5): 433-444.
[8]	KONG Hong-Zhi, LIU Jian-Quan. Karyomorphology of the genus Pomatosace Maxin. (Primulaceae) [J]. , 1999, 37(5): 445-450.
[9]	Kong Hong-zhi, Yang Qin-er. Karyomorphology and Relationships of the Genus Circaeaster Maxim. [J]. , 1997, 35(6): 494-499.
[10]	Gu Zhi-jian. The Discovery of Tetraploid Camellia reticulata and Its Implication in Studies on the Origin of This Species [J]. , 1997, 35(2): 107-116.
[11]	Fang Ding, Qin De-hai, Lu Xiao-hong. New Plants of Gesneriaceae from Guangxi of China (Cont. I) [J]. , 1994, 32(6): 563-570.
[12]	Pan Kai-yu, Yang Qin-er. Karyotypes of Disanthus and Mytilaria (Hamamelidaceae) [J]. , 1994, 31(3): 235-239.
[13]	Fang Ding, Qin De-hai, Zeng Ling. New Plants of Gesneriaceae from Guangxi of China [J]. , 1993, 31(5): 463-471.
[14]	Wang Wen-Tsai, Li Zhen-Yu. Genus Novum Gesneriacearum Vietnam [J]. , 1992, 30(4): 356-361.
[15]	Pan Kai-Yu. Taxonomy of the Genus Oreocharis (Gesneriaceae) [J]. , 1987, 25(4): 264-293.

Karyomorphology of four species in Ancylostemon, Briggsiopsis and Lysionotus (Gesneriaceae)

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 15

Recommended Articles

Metrics

Comments