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    15 June 1996, Volume 16 Issue 2
    NOTULAE DE RANUNCULACEIS SINENSIBUS( XIX)
    Wang Wen-tsai
    1996, 16(2):  155-166. 
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    species and 4 varieties are described as new.3 new combinations are made.The specific status of Delphinium eriostylum Lévl.inappropriately treated as a variety of D.bonvalotii Franch.by me in 1979, is restored.Delphinium grandiflorum L.var.glandulosum W.T.Wang (1962) is proved to be identical with D.grandiflorum var.gilgianum (Pilger) Finet et Gagnep.(1904) and must lapse into synonymy.After the structure of the carpel of Ranunculus polii Forb.et Hemsl.has been understood, the misidentification of the Jangxi and Anhui plants as R.polii is revealed, and a new species, i.e.R.podocarpus W.T.Wang, represented by those plants, is recognized.New distribution records for Delphinium tabatae Tamura, Thalictrum petaloideum L., and Callianthemum cuneilobum Hand.-Mazz.are reported.
    NEW MATERIALS FOR THE FLORA OF GUIZHOU PROVINCE
    Xu Tian-lu, Chen Xiang
    1996, 16(2):  167-170. 
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    In the present paper, one new variety of the Myrsinaceae, Rapanea verruculosa C.Y.Wu var.longifolia T.L.Xu,is described, and one genus, Loesneriella A.C.Smith (Hippocrateaceae),twelve species, and two varieties are reported for the first time for the flora of Guizhou Province.
    SOME NEW RECORDS OF ROSACEAE FROM SHANDONG PROVINCE
    Zhu Ying-qun, Zang De-kui, Li Bin, Dai Xian-de
    1996, 16(2):  171-172. 
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    Spermatophyte, New geographical distribution, Guizhou
    TWO NEW VARIETIES OF THE GENUS OXYTROPIS DC. ( LEGUMINOSAE)
    Qian Guan-ze, Huang Yong, Liu Lian-fen, Zhang Li
    1996, 16(2):  173-174. 
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    ON THE CONCEPT OF “CATHAYSIA FLORA” AND ITS APPLIED LIMIT
    Wang Jun, Liu Hua-qing, Wang Yong-dong, Shen Guang-long
    1996, 16(2):  175-178. 
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    The Cathaysia flora, which mainly flourished during the Permo-Carboniferous time in East Asia, has been held consistently in geology and palaeontology at home and abroad. About the "Cathaysia flora", as a scientific term, on the bases of reviewing its coures of change and development as well as the current studies situation, the writers of this paper point out that it should be inadvisable to enlarge its meaning to refer the flowering flora that has been developed since Triassic.
    A NEW SPECIES OF ARCYRIA MYXOMYCETES
    Wang Qi, Li Yu
    1996, 16(2):  179-181. 
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    A new species, Arcyria gongyloida, was described in this paper.This species was characterized by the capillitium with half-ring, reticulation and spherical expansion.The scanning electron microscope photographs were given.
    NEW RECORDS OF ECTOCARPACEAE (PHAEOPHYTA)FROM CHINA
    Wang Hong-wei, Wang Shu-bo
    1996, 16(2):  182-184. 
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    In this paper, 16 species of Cirsium Adans.(Compositae) from North China were examined for their UV-spectra of methylic extraction from powdered leaf samples.The result shows that their UV-spectra are variable and so distinct as to allow the identification of individual sections and species.On the basis of the UV-spectra, 2 taxa, Section Pseudo-Eriolepis (Nakai) Kitam.and C.segetum Bge.are established, which is supported by the evidences from morphology, karyotype and isoenzyme.In addition, the taxonomic significance of the UV-spectrum has been discussed.
    A PRELIMINARY STUDY ON CHEMOTAXONOMY OF CIRSIUM ADANS. FROM NORTH CHINA
    Yan Ben-hou, Yin Zu-tang, Chen Hu-biao
    1996, 16(2):  185-189. 
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    In this paper, 16 species of Cirsium Adans.(Compositae) from North China were examined for their UV-spectra of methylic extraction from powdered leaf samples.The result shows that their UV-spectra are variable and so distinct as to allow the identification of individual sections and species.On the basis of the UV-spectra, 2 taxa, Section Pseudo-Eriolepis (Nakai)Kitam.and C.segetum Bge.are established, which is supported by the evidences from morphology, karyotype and isoenzyme.In addition, the taxonomic significance of the UV-spectrum has been discussed.
    STUDY OF GENOME CONSTITUTION OF THINOPYRUM INTERMEDIUM
    Zhang Yan-bin, Gao Zhi, Xiao Zhi-min, Qi Shi-yu, Han Fang-pu
    1996, 16(2):  190-194. 
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    In this paper, genome constitution of Thinopyrum intermedium were studied by systematic cytogenetic analysis and N-banding of somatic cell.The results indicated that there are no B genome of Triticum in Thinopyrum intermedium, but there are two distant homologous genome in Th.intermedium.The two distant homologous genome of Th.intermedium are not from diploid Thinopyrium elongatum.
    DROUGHT RESISTANCE INDEX OF THREE SPECIES OF TREES IN THE NORTHWESTERN SHANXI
    Wang Meng-ben, Li Hong-jian, Chai Bao-feng
    1996, 16(2):  195-200. 
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    The seasonal and interspecific changes of drought resistance index were studied in three tree species, Malus micromalus, Robinia pseudoacacia and Caragana korshinskii, based on the data of main water parameters measured by using pressure volume(PV) technique.The result showed that the seasonal change trend of drought resistance in the three species was closely related with both the growth and development stages and the environmental water conditions from May to October, and that the droght resistance in every species was the weakest in May, much stronger in June and July, weak at the autumn rapid growth stage and the strongest or every strong in October.Of these species the drought resistance had following order from strong to weak:M.micromalus,C.korshinskii, R.pseudoacacia.With its strongest drought resistance M.micromalus was a valuable fruit tree species in the triangle area of Shanxi, Shaanxi and Nei Monggol, Because of its great adaptive capacity to water stress C.korshinskii was of great value in both soil and water conservation and fodder production.
    STUDY ON THE EFFECT OF TOMATO SEEDS PHYSIOLOGY AND BIOCHEMISTRY WITH 60Co-r RAY IRRADIATION
    Guo Gui-yun, Mi Xiao-ju, Xing Yi, Zhang Da-wei
    1996, 16(2):  201-207. 
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    The effect on the germination rate, the division of root tip's cells, the meiosis and peroxidase isoenzyme of tomato seeds irradiated with 60Co-Ray and cultivated were observed.The results revealed that the seeds germination rate is highest, the abnormal rate is highest, the type of abnormal chromosome is most abundant, the meiosis is lowest, the activity of peroxidase isoenzyme is highest, when irradiation dose is in range 10-20 Krad.
    STUDY ON PHYSIOLOGICAL ECOLOGICAL CHARACTERISTICS OF POPULUS PSEUD -SIMONII
    Hou Feng-lian, Wang Wen-zhang, Feng Yu-long, Hou Li-juan, Kong Ling-wu
    1996, 16(2):  208-213. 
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    This paper concerns with the studies of the diurnal change of the net photosynthetic and respiratory rates of populus pseud-simonii.The results showed the change appeared as a double-peak curve.The peaks appeared at 90'clock in the morning and at 15 o'clock in the afternoon.The lowest appeared at 1 o'clock in the afternoon, in other words, minimum at noon.The diurnal change depended on the environmental factor.
    INFLUENCE OF TEMPERATURE OF ROOT SYSTEM ON TOMATO(Ⅱ)——INFLUENCE OF ROOT TEMPERATURE ON PHOTOSYNTHESIS AND WATER METABOLISM OF TOMATO
    Feng Yu-long, Liu En-ju, Cui Zhen-xiang
    1996, 16(2):  214-218. 
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    Photosy nthetic rate at 30℃ root temperature was the biggest.Photosynthetic rate decreased at lower or higher root temperature, and reached its low est value at 40℃ root temperature.The mechanism of the influence of root temperature on photosynthesis was different at different root temperature.15℃ root temperature affected photosynthesis throug hreduction of chlorophyll content and increment of its a/b ratio; 40℃ root temperature affected photosynthesis through decrease of leaf conductance or internal CO2 concentration of leaf, and the accumulation of photosynthate in leaf; at 20-30℃ root temperature, mesophyll resistance or other factor maybe was dominant factor of lomiting photosynthesis.Transpiration rate was the highest at 30℃ root temperature, but the water utilization ratio is the lowest.Transpiration rate decreased when root temperature increased or decreased, but water utilization ratio increased.Stomata closed partially at lower root temperature; at higer root temperature, stomata closed and resistance of root increased.
    CHANGES IN ACTIVITY OF PROTECTIVE ENZYME OF TOMATO SEEDLING WITH THE SEEDS TREATED BY MAGNETIC FIELD UNDER CHILLING STRESS
    Cai Su-wen, Guo Gui-yun, Zhang Hong-mei, Xi Jiang-hua
    1996, 16(2):  219-223. 
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    The tomato seedlings, of which the seeds were treated by magnetic field, at both cotyledon and euphylla stage exposed under the same lower temperature with different time durations.The result showed that when the seedlings were treated by magnetic field the activity of SOD and CAT as well as the content of GSH and soluble protein in cotyledon seedling were higher than the control.Therefore, the chilling injury symptoms of treated seedlings were alleviated.
    EFFECTS OF LIGHT ON GA3 IN RETAINING CHLOROPHYLL IN DETACTED BARLEY LEAVES
    Lang Jie
    1996, 16(2):  224-227. 
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    GA3 had little effects in dark condition and an obvious effect in light on retarding the decrease of chlorophyll content in barley (Hordeum vulgare L.) leaf segments.GA3 had little effect either in light when it was mixed with ABA and applied to the segments.The free ABA content determined by RIA in the segments was obviously lower in light than in dark conditions in the experiment.It was inferred that the different effects of GA3 on delaying the decrease of chlorophyll content in dark and light conditions was due to the different content of endogenous ABA in the segments in dark and light conditions.
    STUDIES ON DYNAMICS AND REGULATION OF PROPAGATIVE MODULE OF PLEIOBLASTUS MACULATA CLONE POPULATION
    Liu Qing, Zhong Zhang-cheng
    1996, 16(2):  228-234. 
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    According to the theory of J.L.Harper's (1977)modular organism, considering the assemblage of Pleioblastus maculata in the habitat as a clone population, the dynamics of clonal propagative modules and the modules with age class genet of and density of ramets were studied in this paper.These results show as follows:The number of Propagative modules that Ⅲ age class genets produce them is the largest, after this, it is gradully falling with the increase of age class.These numbers of appeared, death and mature of bamboo shoot all are interrelated to the density of ramets in the clone population the correlation density of the largest valuws in al 2.5×104 bamboo modules/ha.There is line correlationship between the numbers of death and mature of bamboo shoot and time of ap-peared bamboo shoot, the regression models as below:model of death ratio:D=27.253+0.702t(R2=0.636) model of mature ratio:M=72.662-0.701t(R2=0.634)
    STUDY ON THE QUANTITY CHARCTERISTICS SEASONAL DYNAMICS OF ANEUROLEPIDIUM CHINESE+HERBS COMMUNITY
    Duo Li-an, Tian De-chang
    1996, 16(2):  235-241. 
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    This study was carried out in Zhao zhou, Hei Longjang.The quantity characterstics seasonal dynamics of the main population, population group and community of Aneurolepidium chinese+herbs community were described.The results showed that the height and coverage of Aneurolepidium chinense.Potentilla flagellaris Population and grow thickly herbs population group, and the coverage and density characteristics of the community appeared as single peak form in growth season.The maximum aboveground biomass was 197.3g/m2 dry matter (DM) occurred on August 5 and then declined.It conformed to the developed logistic model in the growing season, its developed logistic model was:B=224.6038/1+e5.9289-5.5388×102·t-4.8484×104·t2+3.5365×106·t3
    THE FUTURE CLIMATE CHANGE AND ITS INFLUENCES TO FOREST IN HEILONGJIANG PROVINCE
    Jiang Nai-zhun, Duan Wen-biao
    1996, 16(2):  242-245. 
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    The background of global climate change was briefly summarized in this paper.On the basis of this,the comprehensive effect of various factors lncluding seawater temperature.sunspots activities,volcanic explosion CO2 concentration change,O3 concentration change and characteristic of general atmospheric circulation index on the climate change and the tendency of climate change of ten years in future in HeiLongJiang province was predicted according to the quantitative and qualitative relationships among the historical climate data in the past one hundred years, various factors as stated above and climate change of HeiLongJiang province.The results showed:The climate of ten years in future will be mainly warm and dry.There will be still annual fluctuation.Although the general tendency of climate change accords with global climate change, the regional characteristic is also distinct.The probable influence of climatechange on forestry was put forward and the forestry response strategies was elementarily discussed.