Table of Content

15 June 1995, Volume 15 Issue 2

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A REVISION OF THE GENUS RANUNCULUS IN CHINA(Ⅰ)

Wang Wen tsai

1995, 15(2):  137-180. 

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CHINGYUNGIA, A NEW GENUS OF VERBENACEAE FROM CHINA

Ai Tie min, Yang Lian ju, Tian Jian jun

1995, 15(2):  181-184. 

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A NEW VARIETY OF DIANTHUS CHINENSIS L.

Lu De-quan

1995, 15(2):  185-186. 

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A NEW VARIETY OF SAUSSUREA CHINA

Wang Shu-yun, Han Quan-Zhong

1995, 15(2):  187-188. 

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A NEW RECORD SPECIES OF UREDINOPSIS IN CHINA

Xue Yu, Shao Li-ping, Jin Gui-min

1995, 15(2):  189-190. 

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A new record of Uredinopsis ossiformis Kamel was collected from Jilm province.The specimen of the new recod is deposited in Northeast Forestry University and Mycological Herbarium of Institute of Microbiology, Academia Sinica, Beijing.JiLin:Chang Bai Mountain, 1 September 1991, Xue Yu et al. 00102(Specimen, deposited in the Northeast Forestry University and Mycological Herbarium of Institute of Microbiology, Academia Sinica, Beijing.

SOME NEW RECORDED PLANTS FROM ANHUI AND NEW GEOGRAPHICAL DISTRIBUTION

He Jia-qing, Dong Jin-ting, Zhang Xu-dong

1995, 15(2):  191-194. 

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The persent paper is a supplement to the recently published Flora of Anhui, 13 species. 2 varieties. Among these 9 species. 2 varieties and 2 genera (Salsoa, Malcolmia) are new recorded and 3 species naturalized to Anhui Province.All the specimens concerned are stored in the Herbarium of resource, Anui University (AUR).

A REVISION OF ILLICIUM JIADIFENGPI B. N. CHANG

Lin Qi, Chen San-mao

1995, 15(2):  195-198. 

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Based on the study of 403 specimens of Illicium jiadifengpi B. N. Chang collected in 42 herbaria in China, I. jiadifengpi B. N. Chang is confirmed to be an unique species in China and distribute in Anhui, Zhejiang, Jiangh, Fujinn. Hubei, Hunan, Guangdong and Guangxi. I. jiadifengpi B. N. Chang var. baishanense B.N. Chang et S. H. On is regarded as a new synonym of I. jiadifengpi B. N. Chang. I. minwanense B. N. Chang et S. D. Zhang is reduced to I. jiadifengpi B. N. Chang f. minwanense (B. N. Chang et S. D. Zhang) Q. Lin. I wuyishanum Q.Lin is considered as a synonym of I. jiadifengpi B. N. Chang f. minwanense (B. N.Chang et S. D. Zhang) Q. Lin.

A PRELIMINARY CYTOTAXONOMICAL STUDY ON THE CHINESE ARISTOLOCHIA(ARISTOLOCHIACEAE)

Yu Wei, Huang Lu-qi, Cheng Ching-yung

1995, 15(2):  199-205. 

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This paper reports chromosome numbers and karyotype analysis of 12 Aristolochia species from China for the first time. The results are shown in Table 1 and 2.The general aspects of the chromosome of this genus are small in size, mostly metacentric and submetacentric, the secondary constrictions are nearly all on the long arms, karyotypes are 1A, 2A, 3A, 1B. 2B and considered as symmetric types.Besides the previously reported x=6、7, x=8 is suggested here as one of the basic number of the genus owing to the frequent occurrence of 2n=32 in Subgen.Slphisia. According to the karyotype analysis, species with 2n=32 seem to be allotetraploids.

SEED MORPHOLOGY OF GERANIACEAE IN NORTHEASTERN CHINA AND ITS TAXONOMIC SIGNIFICANCE

Lu Zhao-hua, Cao Wen-zhong, Zhang Yu-lan

1995, 15(2):  206-212. 

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In this psper, the seed coat submorphology and seed morphology of Geraniaceae(2 genus.14 species 1 variety and 1 form) in Northeastem China were studied.the results show that there are many differences between genus Erodium and genus Geranium either seed-coat sculpture (primary and secondary sculpture) or seed morphology (seed shape.length/width ratio). Seed and seed-coat morphology provsde a lot of key information with taxonomy of genus Geranium.The present seed coat and seed morphological classificationis is in accordance with Kitagawa's svstem of Geraniaceae, which was done using other morphological characters.

CYMBOPOGON JWARANCUSA(JONES) SCHULT.A SPECIES NEW TO YUNNAN AND ITS CHEMICAL COMPONENTS OF VOLATILE OIL

Zhang Rong, Xie You-kuan, Su Zhong-wu, Li Cheng-hu

1995, 15(2):  213-214. 

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This paper reported that Cymbopogon jwarancusa (Jones) Schult. is new to Ynnan and the chenical components of its oil was given.The percentage of piperitone is more than 65% and therefore this plant is useful.

ANATOMICAL STUDIES ON THE PRIMARY VASCULAR SYSTEM OF THE SEEDLING OF NEGELLA SATIVA L.(RANUNCULACEAE)

Wang Li jun, Zang You min, Jia Wei ping, Gu An-gen

1995, 15(2):  215-219. 

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The mesarch and diareh siphonostele stage was found in the middle part of the cotyledon node zone of seedling of Nigella sativa. This discovery indicates that seed plants and ferns have a common ancestor in phylogeny.

STUDY ON COMMUNITY CHARACTERISTICS OF NATURAL PINUS DENSIFLORA FORESTS IN CHANGBAI MOUNTAIN AREA

Xu Cheng yang, Zhang Jing, Shen Hai long, Song Lin, Hu Xiang-yi

1995, 15(2):  220-229. 

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The component, life form. regeneration, succession and growth characteristics of natural Pinus densiflora communities (PDC) were analysed. Lacking native species, the element of species was simple in natural PDC in Changbai mountain area. The natural PDC succeeded in prime stage, and its procession direction were deeply affected by disturbance. The pattern was weak aggregative for regeneration populations. Productivity of the hazel-PDC was the highest in severeal main types of PDC, and that of the bush clover-PDC and the grass-PDC were following the former's, that of the daurian rhododendron-PDC was the lowest. Management methods of different types of PDC were also proposed.

STUDIES ON THE CLASSIFICATION AND ECOLOGY OF ZOYSIA JAPONICA COMMUNITY INH LIAODONG PENINSULA

Dong Hou-de, Zhao Li, Chen Zhong-lin, Shao Cheng

1995, 15(2):  230-245. 

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This paper makes close analysis, using formation bable method and quantitative classification method, on the materials obtained from the field investigation of Xiuyan County, Liaodong Peninsula. The Zoysia japonica Formation in this area can be divided into four types of associations, namely, Ass. Zoysia japonica Ass. Zoysia japonica+Carex nanella. Ass. Zoysia japonica+Carex napella+Indigofera kirilowii, and finally Ass. Zoysia japonica+Carex nanella+Perennial forbs. This paper discusses into details of the component of species and their life-form, the structure of community and the vertical distribution of biomass of these associations. The principal component analysis (PCA) shows that light intensity in grassy layer of community and the content of organic matter in soil constitute the main natural ecological factors that affect the formation of the associations. The correlative analysis further reveals that the light intensity in grassy layer is positively correlative with aboveground biomass and ear sprouting rate of Zoysia japonica. the organic matter content in soil is negatively correlative with them. The paper also describes the succession law of Zoysia japonica commnunity. It points out that human activity plays very important roles in this succession. proper period and intensity for pasturing, mowing and seed-harvesting will be helpful to make full uses of Zoysia japonica resources.

PLANT ROOT EXUDATION AND ITS SIGNIFICANCE IN FORESTRY

Fan Jun-gang, Fan Guo-ru

1995, 15(2):  246-251. 

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This paper reviews the composition and amounts of plant root exudates, and discusses about the factors affecting root exudation, the sites of exudation, zone of soil influenced by exudates. Finally, large sections are focused on tree root exudation and its influence on soil microorganisms, soil nutritional conditions and the other adjoining plants.

DIURNAL CHANGES OF PHOTOSYNTHESIS AND TRANSPIRATION OF MANUALLY PLANTING PUCCINELLIA TENUIFLORA

Yan Xiu-feng, Sun Guo-rong, Li Jing-lan, Li Jing-xin

1995, 15(2):  252-255. 

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This paper concerns with the studies of the diurnal changes of photosythesis and transpiration of Puccinellia tenuiflora which was planted on Songnen alkalized grassland for one to three years. Diurnal changes of photosynthesis and transpiration of P. tenuiflora growing for one year is different from that growing two and three years. Diurnal changes range of photosynthesis rate and transpiration rate of P.tenuiflora growing one year is larger than that of growing two and three years. and it's water use efficiency is lower than that of growing two and three years.

THE RELATIONSHIP BETWEEN THE STRUCTURE AND THE SUNLIGHT UTILIZATION RATIO OF DIFFERENT FORESTRY COMMUNITIES

Zhao Bac chen, Liu Zi qiang, Wu Shu jie

1995, 15(2):  256-262. 

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Ba on the observed data of the crown structure of artificial Latix olgensis stands and larix olgensis-northeast China ash mixed stands, we established the crown cone model of larix and northeast China ash. By observing the sun radiation in the two forestry communities, from physical basic law of absorbtion, reflection and transmission of electromagnetic wave, we calculate the sunlight utilization ratio of the two forestry communities respectively. and get the result that the sunlight utilization ratio of the double strata mixed stands is larger than that of the one single stratum pure stands.

INDUCTION OF VIRUS FREE STRAWBERRY AND RESEARCH ON PHOTOSYNTHESIS OF PLANTS

Yu Li jie, Cui Ji zhe

1995, 15(2):  263-268. 

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Virus-free strawberries were obtained by runner-tip meristem culture and anther culture, and the frequencey of virus-free plants were 72. 7~95. 5% and 66. 7~79. 2% respectively. Heat-treatment of plantlets from meristem culture at 38℃ increased the frequency of Virus-free plants. Compared with the controls. the virus-free strawberries increased 11. 7~26. 2% in yield, 2. 3~26. 9% in concentration of chorophyll. and 6. 9~12. 1% photosynthesis rate.

A GENERAL REVIEW OF THE VEGETATION OF HEILONGJIANG PROVINCE FROM LATE CRETACEOUS TO CENOZOIC

Tong Xi-da, Yang Xiu-juan, Li Zhen, Kang jie

1995, 15(2):  269-274. 

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Analysis of the development of vegetation since Late Cretaceous in HeilongjiangProvince is based on the palaeobotanic, palaeogeographic and palaeoclimatic data obtained so far. This paper introduced the characteristics of flora in the ages and their evolution during the period.