Table of Contents

18 February 1984, Volume 22 Issue 1
    Research Articles
  • Cheng Mien
    J Syst Evol. 1984, 22(1): 1-5.
    (1) Many plants in eastern China are conspecific with those in Japan,for example, Cercidiphyllum japonicum, Magnolia sieboldii, Lindera praecox, Kirengeshoma palmata, Platycrater arguta, Oxalis obtriangulata, Orixa japonica, Ilex porpurea, Acer nikoense, Meliosma myriantha, Eurya japonica, Styrax obassia, Comanthosphace japonica, Rabdosia longituba, Mitchella undulata, Croomia japonica, Cypripedium japonicum, Galeola septentrionalis etc. Especially, Peltoboykinia tellimoides and Petrosavia sakuraii were formerly considered as being confined to Japan and Yoania japonica as distributed only in N. India and Japan, but the specimens of these species have recently been collected from Jiulong-shan in Zhejiang Province. (2) Though the genera Cunninghamia, Glyptostrobus, Metasequoia, Liriodendron, Sassafras, Liquidambar etc. existing now in eastern or central parts of China are extinct from Japan, the fossils of leaves, fruits or seeds of Cunninghamia protokonishii, Glyptostrobus europaeus, Metasequoia glyptostroboides, Liriodendron honshuense etc. have been discovered from Japanese Tertiary Strata, which seems to indicate that the floristic relationship between Japan and eastern China was closer in ancient time than it is now. (3) The fact that some species in Japan have close relatives in Nepal, Sikkim or Bhutan may suggest that the western edge of the Sino-Japanese Floristic Region extends probablyto the Himalayan corridor.
  • Chang Roh-Hwei
    J Syst Evol. 1984, 22(1): 6-21.
  • Hsu Ping-Sheng, Wang Han-Jin
    J Syst Evol. 1984, 22(1): 22-31.
    This paper, which consists of a part of pertinent data obtained through a critical revision of the genus Lonicera of China. discusses 28 noteworthy species and infraspecific taxa. Among them, 3 subspecies and 1 variety are new grades and combinations. Be-sides, 31 species, 11 varieties and 6 forms have been reduced to synonyms.
  • Shi Ding-Ji, Li Shou-Quan, Chang Yong-Zhen
    J Syst Evol. 1984, 22(1): 32-37.
    The structures of photosynthetic apparatuses such as leaves, chloroplasts and symbiotic cyanobacterum (blue-green algae) in Azolla-Anabaena azollae associations (Azolla imbricata (Roxb) Nakai) which occur in paddy fields of China were examined using light, scanning and transmission electrn microscopy. Some comparisons were made with A. filiculoides, A. japonica, A. caroliniana, A. pinnata and A. mexicana. Cross sections of A. imbricata were observed by light microscopy and the symbiotic association between the eukaryotic water fern and its prokaryotic blue-green algal symbiont, an Anabaena, was studied. The symbiotic cyanobacterum cells occur not only in a mature leaf cavity, but also in early stages of leaf development, around leaf primordia, and even in macrospores. Under scanning electron microscopy (SEM) it is possible to see stomata and nipples on the surface of dorsal lobes of the fern. The species in the subgenus Euazolla (i.e.A. filiculoides, A. japonica, A. caroliniana and A. mexicana) have rounded nipples, but those in the subgenus Rizosperma (i.e.A. imbricata and A. pinnta) prolate ones. This morphological character is first reported to be related to the taxonomic system. The result of the observation with transmission electron microscopy (TEM) shows that A. filiculoides contains more thylakoides in chloroplasts than A. imbricata does, and the grana lamellae have more stacks in the former than in the latter. The differences are in agreement with the differentiation of the two species in photosynthetic capacity. This may be one of the differences between the two subgenera. The ultrastructures of the symbiotic cyanobacterum are similar to those of free-living Anabaena. The vegetative cells show a typical bilayered cell wall and the heterocysts have a thikened wall. The thylakoid membranes in both heterocysts and vegetative cells are oftenseen forming whirls. During the division of vegetative cells, their contents aggregate and then redistribute.
  • Fang Shu-Min, Zhang Hai-Dao
    J Syst Evol. 1984, 22(1): 38-42.
    The vegetative characters of Ligusticum chuanxiong Hort. cv. Fuxiong are described in comparison with L. chuanxiong Hort. and L. sinense Oliv. The chromosome numbers and karyotypes of the three taxa were studied in root tip cells by Feulgen’s squash method. Their karyotypes are determined as follows: L. chuanxiong, K(2n)=22=16 m+ 4sm+2st (sat); L. chuanxiong cv. Fuxiong, K(2n)=33=24 m+6sm+3st (sat); L. sinense, K(2n)=22=12 m+6sm+2sm (sat)+2st (sat). The karyotypic similarities are found between L. chuanxiong and its cultivariety, butthe former is a diploid while the latter probably is a homologous triploid.
  • Hsu Ping-Sheng, Huang Shao-Fu, Mao Zong-Guo, Yu Zhi-Zhou, Lin Jin-Zhen
    J Syst Evol. 1984, 22(1): 43-45.
    A karyotypic analysis of Lycoris longituba Y. Hsu et Fan was carried out. The voucher specimen, Z. G. Mao 10501, is preserved in the Herbarium of Hangchow Botanical Garden. The chromosome number in root tip cells of the species is found for the first time to be 16, among which 6 are large, V-shaped with submedian primary constrictions, and the other 10 are short, rod-shaped with terminal primary constrictions. Photomicrograph of the chromosome complement and idiogram are given in Fig. 1-3 respectively. The karyotype formula of the species is therefore 2n=16=6m+6t+4t (SAT) in the light of the chromosomal terminology defined by Levan and al.[5] Based on the view stressed by Jones[3] and Brandham[4], successive fusion of the chromosomes should be taken as the essential mechanism for karyotype evolution and speciation in Lycoris. Reciprocal translocation, with the loss of one of the centromeres, might be the mechanism of origin for a V chromosome. It is, then, suggested that the decrease in chromosome number as a result of fusion of the rods with terminal or subterminal primaryconstrictions has taken place in the speciation of L. longituba.
  • Hsu Ping-Sheng, Huang Shao-Fu, Yu Zhi-Zhou, Lin Jin-Zhen, Mao Zong-Guo
    J Syst Evol. 1984, 22(1): 46-48.
    The present paper embodies the results of a karyotypic analysis for the species Lycoris rosea Traub et Moldenke. The voucher specimen, J. Z. Lin 004 is preserved in the Herbarium of Hanchow Botanical Garden. The chromosome number in root tip cells is found for the first time to be 22, and the karyotype is shown to be an asymmetrical one with rod-shaped chromosomes. A photomicrograph, the karyotype and the idiogram are shown in Figs. 1-2. According to Levan et aL.[5], the karyotype formula of the species is 2n=22=22t. But based on the classification presented by Bose and Flory[1], the karyotype formula should be expressed as 2n=22 =C22, and the chromosomes are all with subterminal constrictions. If regarding 11 as the basic number and centric fusion as the major tendency of karyotype evolution as proposed by Inariyama[2], Stebbins[6], and Jones[3,4] in particular, L. rosea would be considered as one of the most primitive species in Lycoris from point of view of karyotype evolution. Reciprocal translocations and centric fusions would give rise to V-shaped chromosomes. Consequently, the successive decrease in chromosome number may have taken place in the speciation of the genus under discussion. Yet further evidence seems ne-cessary for the verification of the speculation.
  • Zhang Sui-Shen, Ho Shan-Bao, Wang Yong
    J Syst Evol. 1984, 22(1): 49-52.
    The present paper deals with the anatomy of vegatative organs of Gymnotheca Decsne. Many significant differences between the genus and the other genera (Saururus L. and Houtuynia Thunb.) of the same family have been discovered in our study. On the contrary, the genus and Zippelia Bl. of the family Piperaceae have many anatomical characteritics in common. The genera Gymnotheca Decne. and Zippelia Bl. are therefore considered intermediate between the families saururaceae and Piperaceae from anatomical point of view.
  • Xiao Pei-Gen, Chen Di-Hua, Song Wei-Liang
    J Syst Evol. 1984, 22(1): 53-56.
    From the whole plant of Aconitum gymnandrum Maxim., four diterpene alkaloids have been isolated and identified: talatizamine, 14-acetyltalatizamine, condelphine and isotalatizidine. Thus the species nvestigated, belonging to the monotypic subgenus Gymnaconitum (Stapf) Rapaics, secms to be phytochemically closely related to A. nemorum M. Pop. and A. talassicum M. Pop. From the phytochemical point of view however, A. gymnandrum does not seem to be the most advanced species within the genus Aconitum.
  • Bao Shi-Ying
    J Syst Evol. 1984, 22(1): 57-63.
    The present paper is an outcome of taxonomic study of Chinese passifloraceous plants. It contains 2 genera, 23 species, 2 varieties and 7 cultivarieties, of which one species is described as new and two are first recorded from China. The Chinese passifloraceous plants are mainly distributed in Yunnan (2 gen. 16 sp.), Guangdong (2 gen. 9sp.) and Guangxi (2 gen. 8 sp.).
  • Chang Siu-Shih
    J Syst Evol. 1984, 22(1): 64-76.
  • Li Yong-Kang
    J Syst Evol. 1984, 22(1): 77-80.
  • Chen Pang-Yu
    J Syst Evol. 1984, 22(1): 81-82.
  • Li Ping-Tao
    J Syst Evol. 1984, 22(1): 83-84.
  • Yang Bao-Min
    J Syst Evol. 1984, 22(1): 85-86.
  • Yang Chun-Yu
    J Syst Evol. 1984, 22(1): 87-88.