Loading...
Welcome to Bulletin of Botanical Research! Today is Share:

Table of Content

    15 June 1987, Volume 7 Issue 3
    A REVISION OF THE CHINESE PHYLLAN THODENDRON(EUPHORBIACEAE)
    Li Ping-tao
    1987, 7(3):  1-9. 
    Asbtract ( 269 )   PDF (521KB) ( 140 )  
    Related Articles | Metrics
    The Phyllanthodendron,containing approximately 16 species in the world and widely distributed throughout Malay Peninsula to S. E. China, extending from 95° to 114° of longitude and 5° to 26° of latitude. In China it occurs in the Guizhou, Yuannan, Guangxi and Guandong.In this paper, it includes two sections and ten species, of which one section, four species and one combination are discovered as new and described here.
    POLLEN MORPHOLOGY OF THE FAMILY RUTACEAE IN CHINA
    Liu Bing-lun
    1987, 7(3):  11-56. 
    Asbtract ( 333 )   PDF (9311KB) ( 131 )  
    Related Articles | Metrics
    The pollen morphology of 52 species and 2 varieties belonging to 21 genera of Rutaceae from China was examined by means of light microscope of which 6 species examined by means of scanning electron microscope. The pollen of Rutaceae belongs to stenopalynous. According to numbere of the opertures and orn-amentation of exine the pollen of the family can be divided into two types:tricolporate and 4-6 colporate. A pollen morphology key has been shown in this paper based on the pollen characters. In addition, new conbination in Zanthoxylum and Fagara and close affinity between Zanthoxylum and Evodia were discussed in the present study The pollen grains of the family prolate-subspheroidal or ob-late,3-6 lobed-circular or subcircular in polar view. Polar axis×equatorial axis=(18.2-72.8)×(12.3-54.6). The smallest pollen are found in Zanthoxylum dimorphophyllum Hemsl., (20.0-25.0) 22.5×15.0(12.5-17.5). The lagest pollen grains are in Micromelum pubescens Bl.,(46.8-72.6)59.8×46.8 (39.0-54.6). Tricolporate pollen type is common in the family, but 4-6 colporate types are rarely found. The colpi are usually long and narrow with membrane The margin of some colpi are usually thickened.Some pollen are syncolpate in polar view, longicolpate with lalongate ora. The colpus and os intersect each other and They form a cross-mark in the equatorial view. Exine about 1.5-4.0 thick,sexine thicker than nexine. The columella layers are clearly visible. The ornamentations of exines are reticulate and striate. Based on numbers of the opertures and ornamentation of exine 21 genera can be divided into two types and four subtypes:1. Tricolporate (1) The tricolporate with reticulate ornametation; (2) Tricol porate with striate ornamentation. 2. 4-6 colporate (1) 4-6 colporate with reticulate ornamentation; (2) 4-6 colporate with striation ornamentation.
    STUDIES ON THE GENUS RHODODENDRON(Ⅶ)
    Zhao Zhen-ju
    1987, 7(3):  57-66. 
    Asbtract ( 269 )   PDF (2222KB) ( 139 )  
    Related Articles | Metrics
    A NEW SPECIES OF POPULUS IN TROPICAL FORESTS FROM HAINAN
    Luo Ping, Hong Tao
    1987, 7(3):  67-70. 
    Asbtract ( 242 )   PDF (208KB) ( 148 )  
    Related Articles | Metrics
    COMPARATIVE STUDY ON THE LEAF STRUCTURE IN POPULUS QIONGDAOENSIS AND P.ADENOPODA
    Li Wen-tian, Xu Bing-wen
    1987, 7(3):  71-77. 
    Asbtract ( 280 )   PDF (1650KB) ( 158 )  
    Related Articles | Metrics
    The leaf structure of Populus qiongdaoensis T. Hong et P. Luo sp. nov. and P. adenopoda Maxim. were studied in the light microscope, the fluorescence microscope and the scanning electron microscope. The differences between them are as follows:Populus qiongdaoensis The upper epidermis is uniseriate. The sponge parenchyma cells are arranged loosely and the axes of its long cells are parallel to the leaf surface. Stoma is sunken or not sunken. The outer walls of the papillae subsidiary cells forming long peristomatal rims which overlap the guard cells.The cuticular striae of stomatal apparatus are coarse and spinous. The outer wall of the lower epidermis is sac-like with short spines. Populus adenopoda The upper epidermis is biseriate. The sponge parenchyma cells are arranged compactly and the axes of its long cells are perpendicular to the leaf surface. stoma is level and never sunken. The outer walls of the subsidiary cells with short rims which always not overlap the outer stomatal rims.The striae of the stomatal apparatus are fine and numerous and extended as lateral wings which connect with the wavy striae of lower epidermal cells.
    A NEW SPECIES OF ARTEMISIA FROM NORTHEAST OF CHINA
    Chang Gui-yi, Liou Ming-yuan
    1987, 7(3):  79-82. 
    Asbtract ( 207 )   PDF (231KB) ( 126 )  
    Related Articles | Metrics
    A NEW VARIETY OF MERREMIA SIBIRICA(LINN.) HALL.F.
    Shen Bao-an, Liu Xiao-long
    1987, 7(3):  83-84. 
    Asbtract ( 252 )   PDF (102KB) ( 155 )  
    Related Articles | Metrics
    STEREACEAE IN CHINA(Ⅲ)
    Guo Zheng-tang
    1987, 7(3):  85-112. 
    Asbtract ( 361 )   PDF (1679KB) ( 159 )  
    Related Articles | Metrics
    17 species,which belong to Stereopsis, Stereum and Xylobolus of Stereaceae collected from China, are reported in this paper.Of them, 3 species are new species, 1 species is new combination, and 2 species are new records in China. They are Stereopsis crassipileata Z. T. Guo, sp. nov., Stereopsis gracilistipitata Z.T. Guo, sp. nov., Stereopsis pseudocupulata Z. T. Guo, sp.nov.,Stereopsis craspedia (Fr.) Z. T. Guo, comb. nov., Stereopsis his-cens (Berk. & Rav.) Reid and Stereopsis vitellina (Plowr.) Reid.All specimens are de posited in the Herbarium Mycologicum In-stituti Microbiologici Academiae Sinicae, Beijing.
    A NEW SPECIES OF HUPERZIA
    Cheng Jing-fu
    1987, 7(3):  113-115. 
    Asbtract ( 257 )   PDF (164KB) ( 147 )  
    Related Articles | Metrics
    THE SUBAERIAL CYANOPHYCEAE OF TUNDRA ZONE OF CHANGBAI MOUNTAIN
    Wang Ce-zhen
    1987, 7(3):  117-122. 
    Asbtract ( 278 )   PDF (345KB) ( 125 )  
    Related Articles | Metrics
    This paper records 11 species and varieties, including 1 new variety. They belong to 8 genera and 4 families of Cyanop hyta, respectively. They are Chroococcus tenax (Kirch) Hieron var. minor. var. nov.; Gloeocapsa montana Kutzing; Gloeocapsa incrustata Chu; Gloeocapsa ralfsiana (Harvey) Kutzing; Gloeoth-ece rupestris (Lyngb.) Bornet var. minor Jao; Aphanothece saxicola Nageli; Aphanothece castagnei (Breb.) Rabenhorst; Aphanocapsa musicola (Mengh) Wille; Schizothrix lamyi Gamont; Nostoc paludosum Kutzing ex Born et Flahj Stigonema minutum (Ag.) Hass;Stigonema mamillosum (Lyngb.) Ag. ex Born. Six species of them are first reocorded in Jilin Province and one variety are prososed as new to phycological science. In Tundra zone the distribution of these subaeria Cyanop-hyceae are determined by aerial moisture and water content of upper layer of soil.
    KARYOTYPE ANALYSIS OF 3 SPECIES OF GENUS PODOCARPIUM AND CHROMOSOME NUMBERS OF 2 SPECIES OF GENUS DESMODIUM
    Cui Xian-ju
    1987, 7(3):  123-130. 
    Asbtract ( 288 )   PDF (867KB) ( 180 )  
    Related Articles | Metrics
    The present paper deals with a study of the karyotype analysis of 3 species of genus Podocarpium and chromosome numbers of 2 species of genus Desmodium. The chromosome numbers and karyotypes of 2 species of genus Podocarpium (P. williamsii (Ohashi)Yang et Huang and P. duclouxii (Pamp.) Yang et Huang) and chromosome numbers of 2 species of genus Desmodium (D. cauda-tum(Thunb.)DC. and D. yunnanense French.)are reported for the first time. The chromosome numbers of 5 species tested have been found to be 2n=22 uniformly. 24 chromosomes are often found in root-tip cells of P. williamsii, on the basis of observing a lot of cells, I find that chromosome number 5 is easily separable into two parts at the kinetochore. I think, therefore, 24 chro-mosomes are result of the separation of chromosome number 5 caused by testing process, not occured naturally. The karyotype formula are as follows:P. podocarpum, 2n=2x=22=18m+4sm P. williamsii, 2n=2x=22=10m+12sm P. duclouxii, 2n=2x=22=14m+8sm Photomicrographs of the chromosome complement and the idiograms are shown in plate Ⅰ and Figs. Ⅰ. Measurements in microns of the chromosome sets are given in Table 2. Accarding to Stebbins, the karyotype of P. podocarpum belongs to 2A, and those of P. williamsii and P. duclouxii belong to 2B.If the karyotype of P. podocarpum is used as representative of Sect. Podocarpium, those of P. williasii and P. duclouxii as represen-tatives of Sect. Repanda, it is easily concluded that Sect. Podo-carpium is less specialized than Sect. Repanda in genus Podocarpium. To confirm this conclusion, further and more study is needed. Among Sect. Repanda, P. williamsii has more asymmetrical or advanced karyotype. The fact suggests that P. williamsii be more advanced than P. duclouxii. Under the same experiment condition, the size of chromosomes of P. duclouxii is found to be significantly larger than that of P. williamsii. Obashi (1980) found that P. oldhamii (Oliv.)Yang et Huang (Desmodium oldhamii Oliv.) had large-sized chromo-somes. Combining gross-morphology, Ohashi considered the species as less specialized than the other species of same section.The separation of P. oldhamii from other species of the section as an independant subsection was confirmed correct. Considering the large-sized chromosomes and special gross-morphology (with tuberous root),I think that it is necessary to separats P. duclouxii from other species of the Sect. Repanda as an independent series.
    THE PEROXIDASE ISOENZYME SPECTRUM ANALYSIS OF FIVE STRAINS OF ALEURITES FORDII
    Huang Jian-ping, Zhu Tao-ying, Chen Yi
    1987, 7(3):  131-136. 
    Asbtract ( 269 )   PDF (496KB) ( 198 )  
    Related Articles | Metrics
    Five strains of Aleurites fordii Hemsl. were showed clear enzymatic bands by their peroxidase and isoenzyme using the polyacrylamide gel electrophoresis technology. The enzymatic band patterns may be divided into three areas according to the darkness and location of the stained bands. The Rf values of the strong bands are almost the same. It shows the close relation-ship of these strains in a species, but the number of other bands in each area and the Rf values of the bands differ from one strain to another show the differences for the strain's classification. The enzymatic band pattern of A. montana is quite different by the research. It has not only the small number of enzymatic bands but also no obvious strong bands compared with the five strains in question. So this work would become a useful means for classification in Aleurites.
    NOTES ON THE LABIATAE OF CHINA
    Li Hsi-wen
    1987, 7(3):  137-138. 
    Asbtract ( 229 )   PDF (101KB) ( 140 )  
    Related Articles | Metrics
    A STUDY ON THE GRASSLAND IN HORTHEAST CHINA
    Chou Yi-liang
    1987, 7(3):  139-158. 
    Asbtract ( 212 )   PDF (1157KB) ( 200 )  
    Related Articles | Metrics
    Northeast China including Prov. Liaoning, Prov. Jilin,Prov. Heilongjiang and the eastern part of Inner Mongolia. The grasslands in it are variety,rich and vast. The grassland community types are swamp, meadow, meadow steppe, and steppe as the habitat dryer. The grassland in Northeast China could be divided into three regions:1. Meadow and Swamp in Muling-Sanjiang Plain The natural resources of meadow and swamp in this region are the richest among those of other types of grassland in Northeast China. Deyeuxia angustifolia is almost the centre of the succession of the vegetation in its dynamic status. Some species of Carex intrude into the community and become the communities dominated by Carex species(light swamp) as the soil moisture increases, but the Phragmites comunies swamp (heavy swamp) becomes if the water stocks on the ground is intermittent. The swamp area is very large in this region, and the turf(peat) of the swamp is a fine resource. The light swamp could be cleared to be cropland in a planned way progressively, while the heavy swamp should be reserved and that should be combined with the turf (peat) excavation, fishpond building and the animal breeding so as to increase the ecological benefit and the economic benefit. The meadow could be cleared to be cropland and the animal husbandry, which the ox breeding was taken as the main part, should be developed. Meanwhile, the shelter forest should be planted and the diversification should be developed. Ⅱ. Meadow steppe in Songliao Plain Songliao Plain includes two parts:Songnen Plain and west Liao River Plain. The former is the main part of the region,the grassland communities in this area could be divided into three ecological sequences according to the succession pattern of the vegetation:(1) black soil ecological sequence;(2) alkaline soil ecological sequence and (3) saline soil ecological sequence. The black soil area is suitable for clearing and pastoralism; the alkaline soil area is suitable for pastoralism; but the value of the saline soli area is lower than that of the two sequences above, so it should be improved to the alkaline soil sequence. To sum up, in Songnen Plain, animal husbandry and agriculture should be taken as the main trade and the shelter forest should be planted in the same time so as to increase the economic benefit, the ecological benefit and the social benefit simultaneously. while in the West Liao River Plain, the ecological environment had been destroyed seriously by the economic action of human being. It seems as the desert in landscape now, and the grass, tree should be planted to bind sand. Ⅲ. Steppe in Inner Mongolia Plateau This region is one of the main pasterol area of China. Stipa is the representative plant and almost the centre of the succession of various ecological sequences in this region. In non-sand area,the grassland could be improved to be the root stock grassland,which has higher value than that of the Stipa grassland. But this region is not suitable for large-scale agriculture, and the animal husbandry shold be taken as the main trade instead. Fine herbage should be introduced and the sand binding forest should be planted. Meanwhile, diversification should be developed and suit measures should be taken to local conditions. The ecological equilibrium is fragile in this region, so it should be protected carefully.