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    15 December 1997, Volume 17 Issue 4
    WOONYOUNGIA LAW——A NEW GENUS OF MAGNOLIACEAE FROM CHINA
    Law Yu-wu(Liu Yu-hu)
    1997, 17(4):  353-356. 
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    A NEW SPECIES OF SALIX FROM GANSU
    Sun Xue-gang
    1997, 17(4):  357-358. 
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    A NEW VARIETY OF ENTODON COMPRESSUS C.MUELL.
    Wen Xue-sen, Zhao Zun-tian
    1997, 17(4):  359-360. 
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    The present paper reported a new variety of Entodon compressus C.Muell.i.e., E.compressus C.Meull.var.parvisporus X.S.Wen et.Z.T.Zhao.
    A NEW VARIETY OF LIMONIUM(PLUMBAGINACEAE)
    Huang Yong, Qian Guan-ze
    1997, 17(4):  361-361. 
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    SOME NEW RECORDED PLANTS FROM SHANDONG PROVINCE
    Zang De-kui
    1997, 17(4):  362-363. 
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    4 species, 2 varieties and 1 form collected from Shandong are reported as new records to this province.All the voucher specimens are preserved in herbaria of Shandong Agricultural University and Nanjing Forestry University.
    A NEW FORM OF ZOYSIA CHINA
    Dong Hou-de, Gong Li-jun
    1997, 17(4):  364-365. 
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    SOME NEW RECORDS OF ACROCHAETIACEAE FROM CHINA,Ⅲ
    Luan Ri-xiao, Zhang Shu-mei
    1997, 17(4):  366-370. 
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    This paper is continued 6 species Acrochaetiaceae new to China i.e.(1) Audouinella attenuata, (2) A.globosa, (3) A.gracilis, (4) A.hypneae, (5) A.secundata, (6) A.seriata.
    PRELIMINARY TAXONOMIC STUDIES ON EIGHT TAXA OF GOMPHONEMACEAE FROM NORTHEASTERN CHINA
    Fan Ya-wen, Bao Wen-mei, Wang Quan-xi
    1997, 17(4):  371-376. 
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    In present paper, 3 genera and 8 taxa of Gomphonemaceae from Northeastern China are studied by light and scanning electron microscope.They are:Gomphonema:G.subtile var.sagitta (Schum.) Cl., G.constrictum var.capitatum f.itallica Mayer., G.tenellumKü tz., G.semiapertum Grun., G.vastum var.elongata Skv.;Gomphoneis:G.olivaceoides (Hust) Carter&Bailey-Watts.G.quadripunctatum (φstr.) Dawson ex Ross&Sims.;Didymosphenia:D.geminata (Lyngb.) M.Schmidt.The problem of taxonomy and ecological distribution are discussed preliminarily, and some new taxa are first reported from China.
    STUDIES ON THE SPORE MORPHOLOGY OF ADIANTUM L.IN BEIJING
    Liu Jia-xi
    1997, 17(4):  377-379. 
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    The spores of 4 species of Adiantum L., Adiantum capillus-junosis Rupr.A.edgeworthii Hook., A.pedatum L.and A.capillus-veneris L.were systematically observed under SEM and LM as supplementary instrument in this paper.The morphological characters of the spores were described in detail.Difference of the spore morpholog, especially in the characters of perine and ornamentation, was discussed and can be take as evidence of pellenic of classification among 4 specics.
    STUDIES ON THE BIOSYSTEMATIC RELATIONSHIPS AND GEOGRAPHIC DISTRIBUTION OF TRIKERAIA BOR AND STEPHANACHNE KENG
    Cai Lian-bing, Wu Zhen-lan
    1997, 17(4):  380-388. 
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    In this paper, the biosystematic relationships of Trikeraia Bor and Stephanachne Keng in the tribe Stipeae were analysed based on the characters of external morphology of spikelet, and with the view point of combining geographic distribution and habitat conditions, the centres of the origin of the two genera also explored.The results show that the relationship between the genus Trikeraia and the genus Stephanachne is the closest among genera of Stipeae;the genus Stephanachne is more advanced than the genus Trikeraia;the T.hookeri (Stapf) Bor of Trikeraia is the most primitive species in the two genera, the T.pappi-formis (Keng) P.C.Kuo&S.L.Lu.as well as the ancient stock of S.nigrescens Keng of Stephanachne which is an extinct plant, derived from this species, while the S.pappophorea (Hack.) Keng and the S.monandra (P.C.Kuo&S.L.Lu) P.C.Kuo&S.L.Lu which are other two species of Stephanachne might derived indirectly from the ancient stock of S.negrescens Keng;both the genus Stephanachne and the genus Trikeraia originated from Xizang of China, of which the former probably in western Xizang and the latter in eastern Xizang.
    NOTES ON THE ORIGIN OF TEMPERATE DECIDUOUS BROAD-LEAVED FOREST OF EAST ASIA
    Zhu Hua
    1997, 17(4):  389-396. 
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    Based on the analysis of the possible floristic affinity of the flora of Baihuashan Mountains near Beijing, this paper discussed the possible origin of temperate deciduous broadleaved forest of east Asia.It was concluded that the temperate deciduous broad-leaved forests of the world have close affinity in origin and the deciduous broad-leaved forest of east Asia is the initial one of which most floristic elements show close affinity to the flora of subtropical mountains in SW China.
    FLORISTIC ANALYSIS OF SEED PLANT FAMILIES IN XINJIANG
    Pan Xiao-ling
    1997, 17(4):  397-402. 
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    An analysis of the seed plant families in Xinjiang shows that the flora had a diverse geographical elements, with an overwhelming number of temperate elements (55 families) accounting for 47.8%, including tropical-to-temperate, subtropical-to-temperate, temperate, temperate-to frigid.The element accounts for 73.3% except cosmopolitan families, pure tropical and tropical-to subtropical families are lack in the flora.This phenomenon is the result of the broad latitudes and diversified habitats in Xinjiang.It is shown that the dominant famlillies and typical familes are of various geographical elements, whereas most of them are cosmopolitan.This indicates that, in family level, the seed flora of Xinjiang is an integral part of the Angala Flora.
    THE GEOGRAPHICAL DISTRIBUTION AND FLORISTIC CHARACTERISTICS OF BAMBUSOIDEAE IN HAINAN
    Shan Jia-lin
    1997, 17(4):  403-408. 
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    Based on the statistical analyses of the geographical elements of genera and species, and studies on distribution and relations between Hainan and its neighbouring regions, this paper concludes the flora features as follows:1.This flora of Bambusoideae is rich in Hainan species endemic.The amount (percentage) of Hainan species endemic is 27(71.05%), more than every area on the mainland of China.2.The geographical elements are obviously characterized by tropical nature.3.The distributions of species (or species endemic) on different parts of Hainan is clearly different.On the all parts of Hainan, the southern Hainan is richest in species (or species endemic), the species on the northern Hainan is poorest, the amount of species on the eastern Hainan is more than on the western Hainan.4.The origin of the Bambusoideae flora of Hainan is ancient and the flora is rich in primitive taxa.All the genera are divided into 8 primitive genera (with 8 stamens) and 6 advanced genera (with 6 stamens).5.There are more relations with neighbouring Guang Dong flora of Bambusoideae than with any other area on the mainland of China.
    FLORA AND ECOLOGICAL CHARACTERISTICS OF FERNS IN DONGLING MOUNTAIN AREA
    Yu Shun-li
    1997, 17(4):  409-412. 
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    In Dongling Mountain area, there are 22 species of fern which belong to 11 families and 14 genus.A species is first recorded in Beijing area.The 14 genera can be grouped into 3 distributional types.Of the 3 types, the cosmopolitan type with 7 genera is at the first position.North temperate type with 5 generals at the second position.The 20 species can be also grouped into 3 types.The east Asian distributional type is at the first position.North temperate type at the second position.Their distributional altitude is from 500m to 1600m.Author's address Institute of Botany, Chinese Academy of Sciences Beijing 100093.
    STUDY ON THE DIVERSIFIED SPERMATOPHYTES OF ANHUI PROVINCE
    Shen Xian-sheng, Zhang Xiao-ping
    1997, 17(4):  413-420. 
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    It is first published that there are 2, 498 species of seed plants in Anhui Province, which belong to 898 genera and 163 families (not including cultivated plants and varieties).Among them there are about 6 families, 13 genera, 18 species in Gymnospermeae;26 families, 211 genera, 593 species in Monocotyledoneae and 131 familes, 674 genera, 1, 887 species in Dicotyledoneae.Anhui flora belongs to the flora region of East China and one of North China.It is basically temperate in nature and has a certain endemic elements, and it is chiefly related with E.Asia in geographical relationships.It is obvious in horizontal and vertical vicariance.The flora origin is not after the Tertiary Period.Anhui flora may be divided into 5 districts:South Anhui mountainous district, Dabie mountainous district, the Yangtze River valley and Jiang-huai hilly district, the Northern Huai River plain district and the Northern Huai River hilly district.
    STUDIES ON FLOWER BIOLOGY AND BREEDING SYSTEM OF VICIA L.IN NORTHEAST CHINA
    Liu Xiang-jun, Ding Mei-mei, Zhang Gui-xiang, Zhao Li, Li Rui-jun
    1997, 17(4):  421-430. 
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    Study on flower biology showed that Vicia species in this test were self-pollinated plants (bud pollination).Activity of ATPase could related to acceptability of stigma.Pollen-ovule ratio was higher than Cruden's standard.Flowering phenology differentiated into early spring or spring and summer type, indicating difference of historical geographical conditions in speciation.
    NATOMICAL STUDIES ON THE PRIMARY VASCULAR SYSTEM OF THE SEEDLING OF BRASSICA PEKINENSIS RUPR
    Zhao Li-hui, Gu An-gen, Wang Li-jun, Zhang Shu-ming
    1997, 17(4):  431-435. 
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    Brassica pekinensis has an epigaeous seedling, and there is a xylem in the low part of Cotyledon node zone, and the mesarch and diarch hoplostele which is sunken in the middle part is termed Brassica type in this paper.The author also finds the solenostele stage that belongs to siphonostele in the middle part of CNZ.This discover further prove that solenostele and siphonostele are not only the features of some genus of Ranunculaceae in the body of spermatophete, and they exist in the Brassica of Cruciferae, too.
    GENETIC TRANSFORMATION OF CUCUMBER BY AGROBACTERIUM RHIZOGENES WITH RI-PLASMID
    Liu Wei-hua, Jiang Jing, Shi rui, Ren ru-yi
    1997, 17(4):  436-440. 
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    T-DNA, have been cloned in plasmid vector pBTC-8, were trasferred into cucumber by introducing of Ri-plasmid.Explants of cucumber were cocultured with Agrobacterium rhizogenes harboring the binary vector, and the transfomants with typical phenotype of hairy roots were yielded.The transformed-roots were moved on a culture medium containing Kanamycin to induce the calli and shoots derivated from the calli.Detection of opine showed that the regene rated-shoots are transferred by Ri-plasmid.Transgenic plant show up response to Kanamycin.
    STUDY ON THE RELATION BETWEEN THE STABILITY OF LARIX GMELINI POPULATION AND THE FIRE DISTURBANCE
    Qiu Yang, Li Zhan-dong, Xu Hua-cheng
    1997, 17(4):  441-451. 
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    This paper, which is from the view of Disturbance and Population Ecology, studies the relation between the stability of Larix gmelini population and the fire disturbance in the northern DaXing AnLing mountain with the method of reconstructing fire disturbance history from live and dead material.The result reveals that:fire disturbance is frequent in the history, and average interval is 28.9 years.Larix gmelini is stable depending on its stronger fire resistance, post-fire resilience and self-resilience.The fire resistance of population is related to the fire disturbance regime, the ranks of different fire regime type are listed follows:low frequency middle severity> low severity, and the rank of self-resilience is that:middle severity> high severity> low severity.Both the sequences of the two resilences are that:short period> middle period> long period.This research concludes that:Larix gmelini needs suitable fire disturbance to keep stability.
    THE VERTICAL BELTS OF NATURAL VEGETATION PARTITIONING OF THE GUANDI MOUNTAINS BY USING ORDERED PLOT CLUSTERING,SHANXI,NORTH CHINA
    Feng Zhang, Tieliang Shang-guan, Anders Telenius
    1997, 17(4):  452-454. 
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    In this paper, ordered plot clustering (OPC), a non-hierarchical agglomerative algorithm based on the algorithm of the "gold-partitioning method" (Fisher's method), is introduced to vertical belt partition of Guandi Mountains, Shanxi.The result of the vertical belt partitioning is as follows:1.deciduous broadleave forest belt (800-1600m above sea level), including 2 subbelts:I.temperate coniferous forest subbelt (800-1400m above sea level), and Ⅱ.deciduous broadleave forest subbelt (1400-1600m above sea level);2.coniferous and broadleave mixed-forest belt (1600-1750m above sea level);3.cold-temperate coniferous forest belt (1750-2600m above sea level);4.subalpine shrub and meadow belt (2600-2831m above sea level).The results obtained by OPC analysis are then compared to TWINSPAN using data on the floristic composition of vertical belts of the Guandi Mountains, Shanxi, North China.The result of analysis by OPC is considered as superior to that by TWINSPAN because some TWINSPAN plot groups cannot be explained according to existing vegetation distribution, contrary to the OPC result.