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10 September 2009, Volume 38 Issue 03 Previous Issue    Next Issue

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Quantitative Classification and Ordination of Restoration Succession Plant Communities in Subtropical Peak-Cluster Depression-A Case Study of Peak-Cluster Depression in Nongla,Mashan,Guangxi SHEN Li-na, JIANG Zhong-cheng, LIANG Ming-zhong, HOU Man-fu, QIN Xing-ming, WU Hua-ying, DENG Xin-hui 2009, 38(03): 1-6.  DOI: 10.3969/j.issn.1009-7791.2009.03.001 Abstract ( )   PDF (1303KB) ( )   Restoration succession plant communities in NongLa peak-cluster depression were analyzed by the methods of Two Way Indicators Species Analysis (TWINSPAN) and Detrended Correspondence Analysis (DCA) in this paper.Based on the vegetation systematic principle,20 plots were divided into 10 associations by TWINSPAN to describe their community characteristics.The relationship of restoration succession community and environment grades was given by the DCA result of 20 plots,which showed that the main ecological factors influencing distribution patterns of associations were resume time,human disturbance and bare rate.Moreover,53 species were classified into 4 groups by DCA.The main ecological factors influencing restoration succession communities and their distribution pattern of species were resume time,lithology,moisture and so on.The ecological adaptability of groups and their significance and regeneration niche in communities were reflected by the position in the taxis of all species. Related Articles | Metrics

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Study on Nutrient Contents of Cassava in Its Growth Stages ZHANG Yong-fa, ZHANG Dong-ming, TANG Shu-mei 2009, 38(03): 7-11.  DOI: 10.3969/j.issn.1009-7791.2009.03.002 Abstract ( )   PDF (958KB) ( )   By analyzing the nutrient contents of cassava in its all growth stages from planting to harvest in Danzhou,Hainan Province,cassava's nutrition characteristic and its most suitable nutrition diagnosis part were studied.The results showed that:(1) The macro element contents of cassava varied with months and with organs,and their average contents in whole cassava plant presented K> N>Ca >Mg> P>S;(2) Leaves were identified as the diagnosis parts of nitrogen,phosphorus,potassium,magnesium and sulphur contents;(3) The ratio of average contents of nutrient elements in cassava plant was N:P:K:Ca:Mg:S=0.89~1.87:0.14~0.27:1.06~1.72:0.54~0.99:0.18~0.32:0.06~0.16;(4) During the stage of reproduction,the contents of N,P,K,Ca,Mg and S of cassava dropped with the increasing of plant age regularly. Related Articles | Metrics

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Analysis on Peroxidiase Isozyme of 7 Cultivars of Codiaeum variegatum ZHANG Ning, SU Ming-hua, LIN Qing-hong, XU Su-xia, GUO Ying 2009, 38(03): 12-14,20.  DOI: 10.3969/j.issn.1009-7791.2009.03.003 Abstract ( )   PDF (1969KB) ( )   The morphological characteristics of seven cultivars of Codiaeum variegatum were compared in this study.Moreover,the peroxidase isozyme of seven cultivars was analyzed by means of polyacrylamide electrophoresis.The results showed that the peroxidase isozyme pattern of seven cultivars was inequable,which included a total of 14 bands.Among them,the Num-2 band was the most of 11,and the Num-5 band was the lowest of 6.The isozyme pattern was divided into three parts (A=0-0.18,B=0.18-0.35,C=0.35-0.5).The genetic relationship of seven cultivars was studied by clustering analysis. Related Articles | Metrics

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Induction and Culture of Carrot SK4-316 Somatic Embryos CHEN Yan-hong, LIU Yi-jun, LI Ai-zhen 2009, 38(03): 15-20.  DOI: 10.3969/j.issn.1009-7791.2009.03.004 Abstract ( )   PDF (1014KB) ( )   The hypocotyl of carrot SK4-316 aseptic plantlets were used as explants for studying the effects of different culture medium formula and conditions on callus induction,somatic embryos and their synchronization by indirect somatic embryogenesis,and influence of different dedifferentiation time,dedifferentiation medium and the time of explants removed from induction culture systems on direct somatic embryogenesis.The results showed that the medium 1/2 MS+2,4-D 2.5 mg/L+6-BA (or KT)0.5 mg/L+CH 300 mg/L with 3% sucrose and 0.8% agar was good for callus induction;1/2 MS+2,4-D 1.25 mg/L+KT 0.25 mg/L+6-BA 0.25 mg/L with 3% sucrose was optimum for somatic embryogenesis from callus,and 0.02% ABA promoted the induction of somatic embryos and 0.06% ABA or 15% PEG promoted the maturation of somatic embryos;it was suit for direct somatic embryogenesis from explants which cultured on dedifferentiation solid medium MS+2,4-D 1.0 mg/L for 48 h,and then on liquid medium MS+CH 300 g/L.Moreover,somatic embryos mutation rate increased gradually with culture time of explants on induction medium. Related Articles | Metrics

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Studies on Influencing Factors of Plantlet Regeneration of Stem Segments in Pedicel of Oncidium hybridum LI Li, LUO Jun-qin, XU Jian-guo, NIE Zhen-peng, KE Fu-zhi, SUN Jian-hua 2009, 38(03): 21-23.  DOI: 10.3969/j.issn.1009-7791.2009.03.005 Abstract ( )   PDF (868KB) ( )   The effects of minimal medium,categories and concentration of plant hormone on the induction,proliferation and rooting cultivation of multiple shoots of stem segments in pedicel of Oncidium hybridum were studied by orthogonal experiment.The results showed that 1/2 MS medium was the best minimal medium for the growth of multiple shoots,the best induction medium was 1/2 MS+6-BA 5.0 mg/L+NAA 0.5 mg/L+sugar 20 g/L,the best proliferation medium was 1/2 MS+6-BA 3.0 mg/L+NAA 0.5 mg/L+sugar 30 g/L,and the best rooting cultivation medium was 1/2 MS+IBA 0.05 mg/L+NAA 0.3 mg/L+banana slurry 100 g/L+sugar 20 g/L. Related Articles | Metrics

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Study on Rapid Propagation Medium for Virus-free Plantlets of Dioscorea bulbifera by Orthogonal Design YIN Ming-hua, HONG Sen-rong, XU Wei-hong, WANG Ai-ping 2009, 38(03): 24-26.  DOI: 10.3969/j.issn.1009-7791.2009.03.006 Abstract ( )   PDF (870KB) ( )   The rapid propagation medium for virus-free plantlets of Dioscorea bulbifera were studied by orthogonal design,and the effects of rapid propagation medium including different concentrations of KT,NAA and 2,4-D on rapid propagation of Dioscorea bulbifera were also investigated.The results showed that the best rapid propagation medium for virus-free plantlets of Dioscorea bulbifera was MS+KT 2.0 mg/L+NAA 0.5 mg/L. Related Articles | Metrics

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Study on in Vitro Conservation of the Emmenopterys henryi Germplasm by Orthogonal Experiments HONG Sen-rong, YIN Ming-hua 2009, 38(03): 27-30.  DOI: 10.3969/j.issn.1009-7791.2009.03.007 Abstract ( )   PDF (904KB) ( )   The stem segments with buds of Emmenopterys henryi were used as explants for studying the effects of activated carbon,agar,sealing materials and culture vessels on the in vitro conservation by orthogonal experiments.The stem segments with buds were cultured in 200 ml sterile erlenmeyer flask which was sealed by sealing film and contained MS basic medium,2.0 mg/L KT,2.0 mg/L 6-BA,0.1 mg/L NAA,30 g/L sucrose,0.5 g/L activated carbon,and 7.5 g/L agar for 6 months.The results showed that the survival rate was up to 86.3%.The genetic variation of plantlets in vitro conservation did not appear. Related Articles | Metrics

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Influence of GA3 and ABA on Germination of Immature Rice Bo II You 15 Seeds JIANG Su-mei, GUO Ying-hua, CHEN Xiao-wei, LI Ling 2009, 38(03): 31-33.  DOI: 10.3969/j.issn.1009-7791.2009.03.008 Abstract ( )   PDF (929KB) ( )   Influence of GA3 and ABA on germination of immature rice Bo II You 15 seeds were investigated.The results of treatments with different concentration of GA3 and/or ABA and distilled water (as control,CK) were as follows.Among those treatments,GA3 with 500 mg/L was the best to promote germination,and the germination rate could break through to 80% on the fourth day,which was 56% higher than that of CK.Treatment of ABA with more than 500 mg/L,could inhibit the germination markedly.When treated with both GA3 and ABA,with the ratio of GA3/ABA=1(50 mg/L),GA3/ABA=1/2(10 mg/L),promoted the germination respectively,and made the germination rate get to 60% and 50% on the seventh day,which was 30% and 20% higher than that of CK.Further study indicated that such regulation of GA3 and ABA on germination of immature rice seeds was closely related to the α-amylase activity. Related Articles | Metrics

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Effects of 2-(4-Morpholino) Ethanesulfonic Acid (MES) on the Growth of Arabidopsis thaliana Seedlings CHEN Xiong, LIANG Jian-hua, CHEN Yao 2009, 38(03): 34-36.  DOI: 10.3969/j.issn.1009-7791.2009.03.009 Abstract ( )   PDF (1223KB) ( )   The effects of MES on the growth of Arabidopsis thaliana were analyzed in this study.The Arabidopsis seedlings were cultured on the medium with and without 0.05% MES,respectively.The results showed that the levels of dry weight,fresh weight,chlorophyll content and water content of Arabidopsis seedlings grown on the medium with 0.05% MES were higher than those without MES.Moreover,the activities of PAL and POD of Arabidopsis seedlings grown on the medium with 0.05% MES was lower than those without MES.These results indicated that MES could promote the growth of Arabidopsis thaliana through keeping the pH value of medium in stabilization. Related Articles | Metrics

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Effects of Different Matrix Proportion on Nutrition Growth of Prunus davidiana WANG Gui-yuan, YANG Wei-wei 2009, 38(03): 37-39.  DOI: 10.3969/j.issn.1009-7791.2009.03.010 Abstract ( )   PDF (868KB) ( )   Using the seedlings as test material,experiments were carried out to study the effects of different matrix proportion on the nutrition growth of Prunus davidiana.The results showed that the values of plant height,stem diameter,biomass of Prunus davidiana seedlings which were planted in the mixed matrix of vermiculite and perlite (1:1) were the highest,and the values of those which were planted in the mixed matrix of clay soil and sand were the lowest.The results offer some references for soil-free cultivation of peach. Related Articles | Metrics

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Studies on Growth,Yield and Total Flavonoid Content of Emilia sonchifolia under Different Planting Conditions HU Luo-zhao, LI Tian-le, HU Guan-sheng, YANG Hai-jun, GUO Hao-dong 2009, 38(03): 40-43.  DOI: 10.3969/j.issn.1009-7791.2009.03.011 Abstract ( )   PDF (905KB) ( )   The mixed substrate consisting of orchard soil,common substrate for flower and wormpost which were mixed by volume ratio of 6:3:1,could significantly improve the survival rate and the robust level of the seedlings of Emilia sonchifolia and shorten its time to seedlings.The growth and the yield of E. sonchifolia were affected by the thickness of substrate,light intensity and spacing in the rows in varying degree.The root growth of E. sonchifolia was mainly affected by light intensity and the thickness of substrate,while with adequate light and thick substrate,its root system was stronger.The stem growth of E. sonchifolia was mainly affected by light intensity and secondly by spacing in the rows.But the leaf growth was less affected by any one of the three ecological factors.The yield of E. sonchifolia was most affected by spacing in the rows and was less affected by light intensity and the thickness of substrate.It showed that the reasonable close planting could improve the yield.On the other hand,appropriate shading raised the total flavonoids content of E. sonchifolia,but extended the time for squaring.According to the studies,substrate thickness 7 cm,light intensity 50% and spacing in the rows 5 cm×25 cm gave the best results for cultivation of E. sonchifolia. Related Articles | Metrics

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Opinions about Species of Starchytarpheta (Verbenaceae) in China SHAN Jia-lin 2009, 38(03): 44-46.  DOI: 10.3969/j.issn.1009-7791.2009.03.012 Abstract ( )   PDF (1794KB) ( )   Stachytarpheta urticaefolia (Salisb.) Sims,a newly recorded naturalized plant from China,was first reported in this paper.Distinguishing S. urticaefolia from the relative species S. jamaicensis was briefly present and the redescription of morphological characteristics of both S. urticaefolia and S. jamaicensis was given too.The existing problems of the description of Starchytarpheta (Verbenaceae) in some important references were also clarified.The voucher specimens are deposited in Herbarum of Hainan University (HUTB). Related Articles | Metrics

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A Preliminary Study on Alien Invasive Plants in Fujian Province YANG Jian, CHEN Heng-bin 2009, 38(03): 47-52.  DOI: 10.3969/j.issn.1009-7791.2009.03.013 Abstract ( )   PDF (951KB) ( )   73 species of invasive plants belonging to 29 families are identified and recorded in Fujian Province based on investigation and referring to the related literatures.Among them,the Compositae is the most consisting of 16 species.According to their origins,there are 59 species coming from America,which occupy 80.82 percent in all species.The invasive plants include 6 species which were announced as the first group of alien invasive species by the National Bureau of Environmental Protection in 2003.Their harmfulness,invasive approaches and prevention countermeasures are also discussed. Related Articles | Metrics

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Plant Resources Investigation and Exploitation of Hongshuang Forestry Centre in Rui'an County,Zhejiang Province YU Wen-ni, ZHONG Yuan-yuan, CAO Zhen-rong, CHEN Xian-xing, DING Bing-yang 2009, 38(03): 53-58.  DOI: 10.3969/j.issn.1009-7791.2009.03.014 Abstract ( )   PDF (965KB) ( )   According to preliminary statistics,there exists a total of 1055 species falling into 538 genera,167 families of vascular plants in Hongshuang Forestry Centre in Rui'an County,Zhejiang Province.Among them,there are 715 species of resource plants which have utilization value belonging to 429 genera of 157 families.Based on their properties and application,there are 14 types including timber plants,medicinal plants,oil plants,fiber plants,starch plants,edible plants,aromatic plants,tannic plants,healthy drinking plants,herbage and forage plants,protect and transform environment plants,ornamental plants,agrochemical plants and nectar plants.And the species of medicinal plants is the richest.Then taking 234 species of the commonly used medicinal plants as an illustrative example,the utilization prospect of plant resources was evaluated by evaluation method which was mainly on the basis of the available utilization amount of plant resources.The results showed that 46.2% commonly used medicinal plants could be developed and utilized,for their evaluation values were all above 12.At last,some suggestions for the protection and utilization of plant resources in Hongshuang Forestry Centre were given. Related Articles | Metrics

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Development of Urban Forestry and Selection of Dominant Tree Species in Xiamen Island FANG Shui-chi 2009, 38(03): 59-62.  DOI: 10.3969/j.issn.1009-7791.2009.03.015 Abstract ( )   PDF (885KB) ( )   Base on the investigation of urban forestry in Xiamen,the development status and existing problems of forestry in Xiamen Island were analyzed,and the dominant tree species with more value in the development of forestry were also described. Related Articles | Metrics

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Investigation on Garden Application and Countermeasure Discussion on Rational Utilization for Ficus species in Quanzhou,Fujian HUANG Bi-li 2009, 38(03): 63-68.  DOI: 10.3969/j.issn.1009-7791.2009.03.016 Abstract ( )   PDF (974KB) ( )   Based on the investigation of Ficus species' application on landscape greening in Quanzhou,Fujian,its rich application value was summarized,existing problems and misunderstandings were discussed,and rational utilization and management countermeasures were also proposed. Related Articles | Metrics

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The Key Technology Factors of Producing Nuisanceless Biluochun Tea with High Quality QIAN He, LIU Li-bing, GU Lin-ping, HUANG Zheng-ming, MA Hui-min 2009, 38(03): 69-71.  DOI: 10.3969/j.issn.1009-7791.2009.03.017 Abstract ( )   PDF (863KB) ( )   By analyzing the significance of developing nuisanceless Biluochun Tea and the current situation of tea industry in Suzhou City,the existing problems in the development of nuisanceless tea were pointed out and some key technology factors were put forward. Related Articles | Metrics

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Tissue Culture of Bublophyllum kwangtungense LI Hong-lin, GAO Li, YANG Bo 2009, 38(03): 72-72,78.  DOI: 10.3969/j.issn.1009-7791.2009.03.018 Abstract ( )   PDF (1805KB) ( )   Related Articles | Metrics

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The Biosynthesis of Betaine under Salt-stress and Its Plant Salt Tolerance Molecular Mechanism ZHANG Xue-qin, OUYANG Hai-bo 2009, 38(03): 73-78.  DOI: 10.3969/j.issn.1009-7791.2009.03.019 Abstract ( )   PDF (1538KB) ( )   Betaine is one of the nontoxic osmotic regulators,which is like other small molecular compounds that accumulating rapidly in plants under salt-stress.Accumulation of betaine maintains osmotic balance of cells in plants and keeps the physiological functions normal.The physiological functions,biosynthesis,genetic engineering and plant salt tolerance molecular mechanism of betaine are summarized in this paper,which afforded reference for breeding new salt-tolerance strains. Related Articles | Metrics

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A Review on Plant Resources of Lycoris and Their Landscaping Application JIANG Yan, ZHU Wei, ZHANG Yin-ke 2009, 38(03): 79-82.  DOI: 10.3969/j.issn.1009-7791.2009.03.020 Abstract ( )   PDF (898KB) ( )   Lycoris Herb have rich landscaping application value for their ornamental characteristics of flowers.Based on the description of plant resources and distribution of Lycoris in the world,status of research and utilization,garden application methods and common species being used of Lycoris Herb are analyzed,and several promising species are recommended in this paper.Some suggestions for the further development and application of Lycoris are also proposed. Related Articles | Metrics

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Research Progress of Rare and Endangered Camellia changii Ye ZHU Gao-pu, LI Ji-yuan 2009, 38(03): 83-89.  DOI: 10.3969/j.issn.1009-7791.2009.03.021 Abstract ( )   PDF (1001KB) ( )   Camellia changii Ye is a rare and endangered plant which was discovered in E'huangzhang nature reserve,located at Yangchun City,Guangdong Province.It is a very good germplasm resource for breeding new varieties because of the strong stress resistance,perpetual bloom,bigger and colorful flower and so on.Since there exists rarely wild stock seed which is almost endangered,the further study for Camellia changii Ye is very important to rescue endangered plants and preserve precious germplasm resources.The research progress on biological characteristics,genetic and breeding,endangered mechanism of Camellia changii Ye in the past 20 years is systematically reviewed in this paper.Moreover,corresponding supplement to the former research achievements is given,and some opinions and speculations are also proposed,which is referenced to the further research on Camellia changii Ye. Related Articles | Metrics

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Research Progress on Ricinus Communis Agglutinin YANG Hua-dong, YUAN Wei-hua, OUYANG Xue-jun 2009, 38(03): 90-94.  DOI: 10.3969/j.issn.1009-7791.2009.03.022 Abstract ( )   PDF (1234KB) ( )   Research results such as properties,physiological function and use of Ricinus Communis Agglutinin (RCA) are introduced in this paper.Based on the former studies on application of RCA,scientific research and application value of RCA are described,and its further research trend on application is also discussed. Related Articles | Metrics