Pollen Morphology of Caprifoliaceae from China and Its Taxonomic Signi-ficance

Abstract

Abstract:

The pollen morphology of 54 samples representing 12 genera and 31 species was

investigated with the aid of scanning electron microscope. Observed were pollen grains of

Sambucus, Viburnum, Lonicera, Leycesteria, Heptacodium, Linnaea, Abelia, Dipelta, Kolkwitzia,

Symphoricarpos, Triosteum, Weigela. Based on the shape, size, position and number of aper-

ture, exine sculpture, three types are recognized: 1. Pollen grains subprolate, less frequently

prolate, rather small, 3-colporate, exine reticulate, as in Sambucus, Viburnum. 2. Mostly sphe-

roidal, subolate, bigger than the former, also 3-colporate, exine spinulose as in Lonicera, Ley-

cesteria, Heptacodium, Triosteum, Linnaea, Abelia, Dipelta, Kolkwitzia, Symphoriocarpos, Wei-

gela. 3. Spheriodal, more or less flattend, exine scabrous as in Abelia section Zabelia and

Lonicera section Isoxylosteum.

1. The systematic position of Caprifoliaceae: It has been generally treated as a member

of the order Rubiales together with Rubiaceae, Valeriaceae and Dipsacaceae on floral characters.

In respect to serological character, it has a close relationship with Cornaceae, and was placed

in Araliales. The above stated 2nd and 3rd types of pollen grains are similar to those of

Patrinia (Valerianaceae), Scabiosa (Adoxaceae), Cornus (Cornaceae), and the pollen grains

of the 1st type are similar to those of Styraceae, Genetianaceae and Araliaceae. Taking the in-

formation so far available into consideration, the authors agree to the Cronquists treatment re-

taining Caprifoliaceae in the order Dipsacales together with Adoxaceae, Valerianaceae and

Dipsacaceae.

2. The division of tribes: Formerly Sambuceae included the genera Sambucus and Vi-

burnum. Fritsch (1891) segregated Viburnum from Sambuceae and suggested a new tribe Vi-

burneae including Triosteum. There is distinct difference in palynological features between

these two genera. The exine sculpture of Viburnum is reticulate, but that of Triosteum is

spinulose. It is reasonable to separate another new tribe, Triosteae, from Viburneae.

3. The pollen morphorlogy of several Chinese endemic genera, such as Heptacodium,

Dipelta, Kolkwitzia resembles that of Lonicera, Leycesteria, Linnaea, Symphoricarpos, Abelia,

Triosteum. This evidence supports the foregoing treatment including them in Caprifoliaceae.

4. Two different exine sculptures are shown in sections of the genera Abelia and Loni-

cera. In Abelia the exine of the section Euabelia is spinulose, but that of the section Zabelia

is scabrous. Likewise, in Lonicera, the exine of the section Isoxylosteum is scabrous, while that

of other sections such as Nintooa, Isika, Lonicera, subgenus Caprifolium, is spinulose. It shows

that pollen morphology is one of diagnostic characters for section division.

Key words: Pollen Morphology, Caprifoliaceae

Hu Chia-Chi, He Chao-Xing. Pollen Morphology of Caprifoliaceae from China and Its Taxonomic Signi-ficance[J]. .

[1]	WANG Wei, ZHAO Nan-Xian. Pollen morphology of the Araceae from China [J]. , 2002, 40(6): 517-529.
[2]	SUN Kun, CHEN Jia-Kuan, ZHANG Zhi-Yun. Pollen morphology of 15 species in nine genera of the Hydrocharitaceae [J]. , 2002, 40(6): 490-500.
[3]	LIU Jia-Xi, ZHANG Yu-Long, NING Jian-Chang, ZHAO Yun-Yun, LI Ya-Xuan, ZHANG Jing-Mei. Pollen morphology of the tribe Cynoglosseae of Boraginoideae (Boraginaceae) in China [J]. , 2001, 39(6): 515-522.
[4]	LI Wei-Lin, HE Shan-An, GU Yin, SHU Pu, PU Zu-Mao. Pollen morphology of the genus Rubus from China [J]. , 2001, 39(3): 234-247.
[5]	. [J]. , 2001, 18(1): 11-11.
[6]	SUN Cheng-Ren. Pollen morphology of the Schisandraceae and its systematic significance [J]. , 2000, 38(5): 437-445.
[7]	XI Yi-Zhen, LANG Kai-Yong, HU Yu-Shi. Pollen Morphology of Neottianthe (Orchidaceae) and Its Taxonomic Significance [J]. , 1998, 36(6): 496-502.
[8]	WANG Ping-Li, PU Fa-Ting, ZHENG Zhong-Hua. Palynological Evidence for Taxonomy of Trigonobalanus (Fagaceae) [J]. , 1998, 36(3): 238-241.
[9]	Wang Qing-feng, Zhang Zhi-yun, Chen Jia-kuan. Pollen Morphology of the Alismataceae [J]. , 1997, 35(3): 225-235.
[10]	Huang Jin-ling, Hong De-yuan. Pollen Morphology in the Subtribe Aspidistrinae (Liliaceae s. l.) [J]. , 1997, 35(2): 117-124.
[11]	Huang Lu-qi, Yang Bin, Yue Chong-xi, Cheng Chung-yung. Pollen Morphology of Trichosanthes and Its Taxonomic Significance [J]. , 1997, 35(2): 125-135.
[12]	Tang Yang-chen, Li Liang-qian. The Phytogeography of Caprifoliaceae S. Str. with Its Implications for Understanding Eastern Asiatic Flora [J]. , 1994, 31(3): 197-218.
[13]	Wang Jian-xin, Feng Zhi-jian. A Study on the Pollen Morphology of the Genus Polygonum in China [J]. , 1994, 31(3): 219-231.
[14]	Xi Yi-zhen. Studies on Pollen Morphology and Exine Ultrastructure in Cephalotaxaceae [J]. , 1993, 31(5): 425-431.
[15]	Ning Jian-chang, Xi Yi-zhen, Zhang Yu-long. Pollen Morphology of Microula Benth. and Allied Genera (Boraginaceae) [J]. , 1993, 31(4): 318-328.

Pollen Morphology of Caprifoliaceae from China and Its Taxonomic Signi-ficance

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 15

Recommended Articles

Metrics

Comments