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1.
Alpha-amylase inhibitor (alpha-AI) activity of Garcinia mangostana, commonly known as mangosteen, pericarp extracts was studied by assay guided fractionations from lipophilic to hydrophilic using combined solvent extraction and Amberlite XAD2 adsorption chromatography. Neither the lipophilic, xanthone containing fraction, nor the highly polar fraction, which has no affinity on Amberlite XAD2, showed any alpha-AI. The fraction that shows very high inhibitory activity contains primarily polyphenols and can be adsorbed on Amberlite XAD2. The IC50 of 5.4 microg/mL of this fraction is comparable to that of acarbose, a prescribed alpha-AI used in the control of type II diabetes, at 5.2 microg/mL. Total phenolic content (TPC) of each fraction was measured and the TPC has no correlation with the alpha-AI activity. The lipophilic fraction contains mainly xanthones as revealed by HPLC-MS analysis. Colorimetric analysis coupled with UV-vis and IR spectroscopic analysis demonstrated that the fractions with high alpha-AI activity are primarily oligomeric proanthocyanidins (OPCs) with little gallate moiety. There is also evidence to show that the alpha-AI by these OPCs is not purely by nonspecific protein complexation. Both tannic acid and G. mangostana OPCs precipitate BSA equally well but G. mangostana OPCs are 56 times more effective in inhibiting alpha-amylase.  相似文献   

2.
Chondrosarcoma is a malignant primary bone tumor that is resistant to chemotherapy and radiation therapy. α-Mangostin, a component of Garcinia mangostana Linn, is a xanthone derivative shown to have antioxidant and antitumor properties. This study is the first to investigate anticancer effects of α-mangostin in the human chondrosarcoma cell line SW1353. We showed that α-mangostin inhibited cell proliferation of SW1353 cells in a time- and dose-dependent manner by using the trypan blue exclusion method. Hoechst 33342 nuclear staining and nucleosomal DNA-gel electrophoresis revealed that α-mangostin could induce nuclear condensation and fragmentation, typically seen in apoptosis. Flow cytometry using Annexin V/PI double staining assessed apoptosis, necrosis and viability. α-Mangostin activated caspase-3, -8, -9 expression, decreased Bcl-2 and increased Bax. This promotes mitochondrial dysfunction, leading to the release of cytochrome c from the mitochondria to the cytoplasm. In addition, total and phosphorylated ERK and JNK were downregulated in α-mangostin-treated SW1353 cells but no changes in p38. α-Mangostin also decreased phosphorylated Akt without altering total Akt. These results suggest that α-mangostin inhinbited cell proliferation and induced apoptosis through downregulation of ERK, JNK and Akt signaling pathway in human chondrosarcoma SW1353 cells.  相似文献   

3.
Antioxidant xanthones from the pericarp of Garcinia mangostana (Mangosteen)   总被引:1,自引:0,他引:1  
As part of ongoing research on cancer chemopreventive agents from botanical dietary supplements, Garcinia mangostana L. (commonly known as mangosteen) was selected for detailed study. Repeated chromatography of a CH2Cl2-soluble extract of the pericarp led to the isolation of two new highly oxygenated prenylated xanthones, 8-hydroxycudraxanthone G (1) and mangostingone [7-methoxy-2-(3-methyl-2-butenyl)-8-(3-methyl-2-oxo-3-butenyl)-1,3,6-trihydroxyxanthone, 2], together with 12 known xanthones, cudraxanthone G (3), 8-deoxygartanin (4), garcimangosone B (5), garcinone D (6), garcinone E (7), gartanin (8), 1-isomangostin (9), alpha-mangostin (10), gamma-mangostin (11), mangostinone (12), smeathxanthone A (13), and tovophyllin A (14). The structures of compounds 1 and 2 were elucidated by spectroscopic data analysis. Except for compound 2, which was isolated as a minor component, the antioxidant activities of all isolates were determined using authentic and morpholinosydnonimine-derived peroxynitrite methods, and compounds 1, 8, 10, 11, and 13 were the most active. Alpha-mangostin (10) inhibited 7,12-dimethylbenz[alpha]anthracene-induced preneoplastic lesions in a mouse mammary organ culture assay with an IC50 of 1.0 microg/mL (2.44 microM).  相似文献   

4.
An overwhelming body of research has now firmly established that the dietary intake of berry fruits has a positive and profound impact on human health, performance, and disease. Berry fruits, which are commercially cultivated and commonly consumed in fresh and processed forms in North America, include blackberry ( Rubus spp.), black raspberry ( Rubus occidentalis), blueberry ( Vaccinium corymbosum), cranberry (i.e., the American cranberry, Vaccinium macrocarpon, distinct from the European cranberry, V. oxycoccus), red raspberry ( Rubus idaeus) and strawberry ( Fragaria x ananassa). Other berry fruits, which are lesser known but consumed in the traditional diets of North American tribal communities, include chokecherry ( Prunus virginiana), highbush cranberry ( Viburnum trilobum), serviceberry ( Amelanchier alnifolia), and silver buffaloberry ( Shepherdia argentea). In addition, berry fruits such as arctic bramble ( Rubus articus), bilberries ( Vaccinuim myrtillus; also known as bog whortleberries), black currant ( Ribes nigrum), boysenberries ( Rubus spp.), cloudberries ( Rubus chamaemorus), crowberries ( Empetrum nigrum, E. hermaphroditum), elderberries ( Sambucus spp.), gooseberry ( Ribes uva-crispa), lingonberries ( Vaccinium vitis-idaea), loganberry ( Rubus loganobaccus), marionberries ( Rubus spp.), Rowan berries ( Sorbus spp.), and sea buckthorn ( Hippophae rhamnoides), are also popularly consumed in other parts of the world. Recently, there has also been a surge in the consumption of exotic "berry-type" fruits such as the pomegranate ( Punica granatum), goji berries ( Lycium barbarum; also known as wolfberry), mangosteen ( Garcinia mangostana), the Brazilian a?aí berry ( Euterpe oleraceae), and the Chilean maqui berry ( Aristotelia chilensis). Given the wide consumption of berry fruits and their potential impact on human health and disease, conferences and symposia that target the latest scientific research (and, of equal importance, the dissemination of this information to the general public), on the chemistry and biological and physiological functions of these "superfoods" are necessary.  相似文献   

5.
In vitro and in vivo studies of the health and nutritional properties of durian (Durio zibethinus Murr.) were compared with snake fruit (Salacca edulis Reinw.) and mangosteen (Garcinia mangostana). Dietary fibers, minerals, and trace metals were comparable. Total polyphenols (mg of GAE/100 g of FW) and flavonoids (85.1+/-6.1) were significantly higher (p<0.05) than in snake fruit (217.1+/-13.2 (mg of CE/100 g of FW)), durian (309.7+/-19.3 and 61.2+/-4.9), and mangosteen (190.3+/-12.1 and 54.1+/-3.8). Antioxidant activity (microM TE/100 g of FW) of durian measured by DPPH and ABTS assays (228.2+/-13.4 and 2016.3+/-81.1) was significantly higher (p<0.05) than in snake fruit (110.4+/-7.9 and 1507.5+/-70.1) and mangosteen (79.1+/-5.9 and 1268.6+/-62.3). HPLC/DAD analysis of durian (microg/100 g of FW) showed that quercetin (1214.23+/-116.7) was present at levels three times that of caffeic acid, and twice as high as p-coumaric and cinnamic acids. The correlation coefficients between the bioactive compounds of fruits and their antioxidant activities were high (R2=0.99). Male Wistar rats (25) were divided into five dietary groups: the control group was fed the basal diet (BD); in addition to BD, the cholesterol (Chol) group was supplemented with 1% of Chol; the diets of the Chol/Durian, Chol/Snake, and Chol/Mangosteen groups were supplemanted with 5% of these fruits, respectively. It was found that diets supplemented with durian, and to a lesser degree with snake fruit and mangosteen, significantly hindered the rise in plasma lipids and the decrease in antioxidant activity. The nutritional values were comparably high. In conclusion, it could be suggested that inclusion of studied tropical fruits, especially durian, in known disease-preventing diets could be beneficial.  相似文献   

6.
川中丘陵区土壤侵蚀对土壤特性和作物产量的影响   总被引:8,自引:0,他引:8  
Roles of tillage erosion and water erosion in the development of within-field spatial variation of surface soil properties and soil degradation and their contributions to the reduction of crop yields were studied on three linear slopes in the Sichuan Basin, southwestern China. Tillage erosion was found to be the dominant erosion process at upper slope positions of each linear slope and on the whole short slope (20 m). On the long slope (110 m) and medium slope (40 m), water erosion was the dominant erosion process. Soil organic matter and soil nutrients in the tillage layer were significantly related to slope length and 137Cs inventories on the long slope; however, there was no significant correlation among them on the short slope, suggesting that water erosion lowered soil quality by transporting SOM and surface soil nutrients selectively from the upper to lower slope positions, while tillage erosion transported soil materials unselectively. On the medium slope, SOM, total N, and available N in the tillage layer were correlated with slope length and the other properties were distributed evenly on the slope, indicating that water erosion on this slope was still the dominant soil redistribution process. Similar patterns were found for the responses of grain yield, aboveground biomass, and harvest index for slopes. These results indicated that tillage erosion was a major cause for soil degradation and grain yield reduction on the linear slopes because it resulted in displacement of the tillage layer soil required for maintaining soil quality and plant growth.  相似文献   

7.
B ar -Y osef , B., B arrow , N. J. & G oldshmid , J. (eds). Inorganic Contaminants in the Vadose Zone.
B oddy , L., M archant , R. & R ead , D. J. (eds) Nitrogen, Phosphorus and Sulphur Utilization by Fungi.
B ouwman , A. F. (ed.) Soils and the Greenhouse Effect.
C oyne , L. M., M ckeever , S. W. S. & B lake , D. F. (eds) Spectroscopic Characterization of Minerals and their Surfaces.
D agan , G. Flow and Transport in Porous Formations.
G erstl , Z., C hen , Y., M ingelgrin , U. & Y aron , B. (eds) Toxic Organic Chemicals in Porous Media.
G liessman S. R. (ed.) Agroecology: Researching the Ecological Basis for Sustainable Agriculture.
H ansen , J. A. & H endriksen , K. (eds) Nitrogen in Organic Wastes Applied to Soils.
I dso , S. B. Carbon Dioxide and Global Change: Earth in Transition.
K imball , B. A. (ed.) Impact of Carbon Dioxide, Trace Gases, and Climate Change on Global Agriculture.
L ynch , J. M. (ed.) The Rhizosphere.
M ing , D. W. & H enninger , D. L. (eds) Lunar Base Agriculture: Soils for Plant Growth.
W ood , M. Soil Biology. Blackie, Glasgow. 1989. 154 pp. £23.00 (hardback), £10.95 (paperback).
Y oung , A. Agroforestry for Soil Conservation.
A ndriesse , J. P. Nature and Management of Tropical Peat Soils.
D alzell , I. D. et al. Soil Management: Compost Production and Use in Tropical and Sub-Tropical Environments.
G irard , M. C. & GIRARD, C. M. Télédétection Appliqué.
H ornby , D. (ed.) Biological Control of Soil-Borne Plant Pathogens.
H udson , N. W. Soil and Water Conservation in Semi-Arid Areas.
L obo , V. M. M. Handbook of Electrolyte Solutions
L owrison , G. C. Fertilizer Technology.
S heng , T. C. Soil Conservation for Small Farmers in the Humid Tropics.
U nger , P. W. Tillage Systems for Soil and Water Conservation.
W are , G. W. (ed.) Reviews of Environmental Contamination and Toxicology  相似文献   

8.
Book reviewed in this article:
B ridges , E. M. Healing the Scars: Derelict Land in Wales.
H arrison , A. F., L atter , P. M. & W alton , D. W. H. (eds) Cotton Strip Assay: An Index of Decomposition in Soils.
M oldenhauer , W. C. & H udson , N. W. (eds) Conservation Farming on Steep Lands.
The Utilization of Secondary and Trace Elements in Agriculture.
van B reemen , N. J., V isser , W. J. F. & P ape , Th. (eds) Biogeochemistry of an oak-woodland ecosystem in the Netherlands affected by acid atmospheric deposition.
van H oorn , J. W. (ed.) Agrohydrology-Recent Developments.
Y atsu , E. The Nature of Weathering: an Introduction.
Z onn , S. V. Tropical and subtropical soil science , Trans. M. Victorava.
OTHER BOOK RECEIVED
A hlvin , R. G. & S moots , V. A. Construction Guide for Soils and Foundations (2nd Edition).
B ailey , G. D. (Compiler) Bibliography of Soil Taxonomy, 1960–1979.
C hisholm , A. & D umsday , R. (eds) Land degradation. Problems and policies.  相似文献   

9.
Book reviewed in this article: Alexander , A. (ed.) Foliar Fertilization. Developments in Plant & Soil Sciences Burke , W., Gabriels , D. & Bouma , J. (eds) Soil Structure Assessment. Burrough , P. A. Principles of Geographical Information Systems for Land Resources Assessment. Catt , J. A. Soils and Quaternary Geology: A Handbook for Field Scientists. Chen , Y. & Avinemelech , Y. (eds) The Role of Organic Matter in Modern Agriculture. Chisci , G. & Morgan , R. P. C. (eds) Soil Erosion in the European Community–Impact of Changing Agriculture. Crawley , M. J. (ed.) Plant Ecology. De Datta , S. K. & Patrick , W. H. (eds) Nitrogen Economy of Flooded Rice Soils. Engelstad , O. P. (ed.) Fertilizer Technology and Use Farouk El -Baz & Hassan , M. H. A. (eds) Physics of Desertification. Francis , C. A. Multiple Cropping Systems. Gessel , S. P. (ed.) Forest Site and Productivity. Hauck , R. D. & Weaver , R. W. (eds) Field Measurement of Dinitrogen Fixation and Denitrification. Haynes , R. J., (ed.) Mineral Nitrogen in the Plant-Soil system. Kanwar , J. S. & Mudahar , M. S. Fertilizer Sulfur and Food Production. Lal , R. Tropical Ecology and Physical Edaphology. Lambers , H., Neeteson , J. J. & Stulen , J. (eds) Fundamental, Ecological and Agricultural Aspects of Nitrogen Metabolism in Higher Plants. Lee , R. E. Land and Soil. Marsman , B. A. & De Gruijter , J. J. Quality of Soil Maps: a Comparison of Survey Methods in a Sandy Area. Mitchell , M. J. & Nakas , J. P. (eds) Microfloral and Faunal Interactions in Natural and Agroecosystems. Mokwunye , A. U. & Vlek , P. L. G. (eds) Management of Nitrogen and Phosphorus Fertilizers in Sub-Saharan Africa. Moore , P. D. & Chapman , S. B. (eds) Methods in Plant Ecology Murphy , C. P. Thin Section Preparation of Soils and Sediments. National Research Council . Soil Conservation: Assessing the National Resources Inventory. Reuter , D. J. & Robinson , J. B. (eds) Plant Analysis–an Interpretation Manual. Simpson , K. Fertilizers and Manures. Skinner , F. A. & Uomala , P. (eds) Nitrogen Fixation with Non-Legumes. Thompson , R. & Oldfield , F. Environmental magnetism. Valentine , K. W. G. Soil Resource Surveys for Forestry: Soil, Terrain and Site Mapping in Boreal and Temperate Forests. Van Der Meer , H. G., Ryden , J. C. & Ennik , G. C. (eds) Nitrogen Fluxes in Intensive Grassland Systems. Van Wijk , A. L. M. & Wessling , J. (eds) Agricultural Water Management. Barnard , G. & Kristoferson , L. Agricultural Residues as Fuel in the Third World. Barrett -Lennard , E. G., Malcolm , C. V., Stern , W. R. & Wilkins , S. M. (eds) Forage and Fuel Production from Salt Affected Wasteland. Binkley , D. Forest Nutrition Management. Kual , R. N. & Egbo , C. O. Introduction to Agricultural Mechanisation.  相似文献   

10.
中国拟盘多毛孢属的新组合种(Ⅳ)   总被引:6,自引:5,他引:6  
按近代 Steyaert(1 95 3年 )和 Sutton(1 980年 )有关拟盘多毛孢属 (Pestalotiopsis)的分类体系和有关鉴定性状 ,本文首次报道中国拟盘多毛孢属 8个不同的新组合种。这 8个新组合种是 :(1 )寄生在石榴叶部的石榴拟盘多毛孢 Pestalotiopsispunicae(Husei) Y.X.Chen et Z.W.Wang comb.nov.;(2 )寄生在草莓叶部的阿寇东拟盘多毛孢 Pestalotiopsis jeolikotonis(S.K.Bose) Y.X.Chen et G.Wei comb.nov.;(3 )寄生在山楂叶片、幼苗、枝条与主干等部位的山楂拟盘多毛孢 Pestalotiopsis crataegine(Ell. &EV.Bull)Y.X.Chen et Z.W.Wang comb.nov.;(4 )寄生在木菠萝叶部和果实等部位的木菠萝拟盘多毛孢Pestalotiopsis artocarpi(Nag Raj&Kendric) Y.X.Chen et G.Weicomb.nov.;(5 )寄生在酸藤果叶部的酸藤果拟盘多毛孢 Pestalotiopsis embeliae (M.S.Patil &Theite) Y.X.Chen et G.Weicomb.nov.;(6)寄生在海葡萄叶部的海葡萄拟盘多毛孢 Pestalotiopsiscoccolobae(Ell.et EV.Bull) Y.X.Chen et G.Wei comb.nov.;(7)寄生在华榛叶部的华榛拟盘多毛孢 Pestalotiopsiscoryli(Roster) Y.X.Chen et G.Weicomb.nov.;(8)寄生在荔枝叶部的荔枝拟盘多毛孢 Pestalotiopsislitchii (Sawada) Y.X.Chen et G.Wei comb.nov.  相似文献   

11.
BOOK REVIEWS     
World Map of the Status of Human-Induced Soil Degradation. Global Assessment of Soil Degradation (GLASOD) By L.R. Oldeman, R.T.A. Hakkeling & W.G. Sombroek
Evaluation of Land Resources in Scotland Edited by J.S. Bibby & M.F. Thomas.  相似文献   

12.
BOOK REVIEWS     
Book reviews in this article:
Soils and Environment By S. Ellis & A. Mellor.
Soil Erosion Research Methods Edited by R. Lal.
Agriculture and Environment: Bridging Food Production and Environmental Protection in Developing Countries Edited by Anthony S.R. Juo and Russell D. Freed.
Soil Management in Sustainable Agriculture Edited by H.F. Cook and H.C. Lee.
Soil Nutrient Bioavailability—2nd Edition By Stanley A. Barber.
Soil fertility decline under sisal cultivation in Tanzania By Alfred E. Hartemink.  相似文献   

13.
B ethlenfalvay , G. J. & L inderman , R. G. (eds) Mycorrhizae in Sustainable Agriculture
B ollag , J.-M. & S totzky , G. (eds) Soil Biochemistry
C resser , M., K illham , K. & E dwards , T. Soil Chemistry and its Applications
H anks , R. J. Applied Soil Physics
L al , R. & S anchez , P. A. (eds) Myths andscience of Soils of the Tropics
M agdoff , F. Building Soils for Better Crops: Organic Matter Management
M itchell , J. K. Fundamentals of Soil Behavior
M ulongoy , K. & M erckx , R. (eds) Soif Organic Matter Dynamics and Sustainability of Tropical Agriculture
O jima , D. S. & S vensson , B. H. (eds) Trace Gas Exchange in a Global Perspective
P imentel , D. (cd.) World Soil Erosion and Conservation
T an , K. H. Principles of Soil Chemistry
T opp , G. C., R eynolds , W. D. & G reen , R. E. (eds) Advances in Measurement ofsoil Physical Properties: Bringing Theory into Practice
W icherek , S. (ed.) Farm Land Erosion in Temperate Plains Environment and Hills
W ild , A. Soils and the Environment: An Introduction  相似文献   

14.
B eek , K. J., B urrough , P. A. & M ccormack , D. E. (eds) Quantified Land Evaluation Procedures.
B rady , N. C. (ed.) Advances in Agronomy, Volume 40.
B ruehl , G. W. Soilborne Plant Pathogens.
D okuchaev i nstitute of S oil S cience . Classification and Diagnostics of Soils of the USSR.
D unsmore , J. R. KHARDEP; Rural Development in the Hills of Nepal.
F airchild , D. M. Ground Water Quality and Agricultural Practices.
F itzpatrick , E. A. An Introduction to Soil Science .
F ollett , R. F. (ed.) Soil Fertility and Organic Matter as Critical Components of Production Systems.
G reenhalgh , R. & R oberts , T. R. (eds) Pesticide Science and Biotechnology.
H allsworth , E. G. Anatomy, Physiology and Psychology of Erosion.
L of , P. Soils of the World.
Methods of Soil Analysis. K lute , A. (ed.).
Physical and Mineralogical Methods. P age , A. L., M iller , R. H. & K eeney , D. R. (eds)
Chemical and Microbiological Properties.
M organ , R. P. C. Soil Erosion and Conservation.
N ewman , A. C. D. (ed.). Chemistry of Clays and Clay Minerals.
R unge , E. C. A., et al. (eds) Utilization, Treatment, and Disposal of Waste on Land.
T abatabai , M. A. (ed.) Sulfur in Agriculture.
T ate , R. L., Soil Organic Matter; Biological and Ecological Effects.
T ate , R. L. (ed.) Microbial Autecology; a Method for Environmental Studies.
V aughan , D. & M alcolm , R. E. (eds) Soil Organic Matter and Biological Activity.
W est , S. H. (ed.) Physiological-Pathological Interactions Affecting Seed Deterioration.
W hite , R. E. Introduction to the Principles and Practice of Soil Science.
W ilcox , J. R. (ed.) Soybeans: Improvement, Production and Uses.
W ilson , M. J. (ed.) A Handbook of Determinative Methods in Clay Mineralogy.
W olfe , M. S. & C aten , C. E. (eds) Populations of Plant Pathogens; their Dynamics and Genetics.  相似文献   

15.
Book reviews     
Book reviewed in this article:
Alloway, B.J. & Ayres, D.C. Chemical Principles of Environmental Pollution .
Baize, D. Soil Science Analyses: a Guide to Current Use .
Batjes, N.H. & Bridges, E.M.(eds) World Inventory of Soil Emission Potentials , WISE Report No. 2.
Batjes, N.H. & Bridges, E.M. A Review of Soil Factors and Processes that Control Fluxes of Heat, Moisture and Greenhouse Gases , WISE Report No. 3.
Bigham, J.M. & Ciolkosz, E.J. (eds) Soil Color , SSSA Special Publication No. 31.
Blokhuis, W.A. Vertisols in the Central Plain of the Sudan .
Burt, T.P., Heathwaite, A.L. & Trudgill, S.T. (eds) Nitrate: Processes, Patterns and Management .
Heathwaite, A.L. & Göttlich, K. (eds) Mires: Process, Exploitation and Conservation .
Rolston, D.E., Harper, L.A., Mosier, A.R. & Duxbury, J.M. (eds) Agricultural Ecosystem Effects on Trace Gases and Global Climate Change , ASA Special Publication No. 55.
Schwab, G.O., Fangmeier, D.D., Elliot, W.J. & Frevert, R.K. Soil and Water Conservation Engineering , 4th edn.  相似文献   

16.
中国农业工程教育的发展经历了三个阶段。1949年前是农业工程教育的萌芽阶段,首次将农业工程课程编(纳)入高等学校教程是在1932年,农业工程的两个系分别于1947、1948年在中央大学、南京大学成立。新中国成立以后,农业工程教育在农业机械化技术的基础上迅速发展。1949年至1978年,农业工程专业的大学毕业生大约有2.5万名,中专毕业生6万名,他们中的大多数来自农业机械系。自1979年以来,我国农业工程教育进入了新的发展阶段,拓宽了高等院校,中等技术专业学校的农业工程专业范围。本文还讨论了中国农业工程教育发展过程中存在的一些问题。  相似文献   

17.
中国拟盘多毛孢属的新组合种(Ⅲ)   总被引:2,自引:0,他引:2  
本文为中国拟盘多毛孢属新组合种(Ⅰ)、(Ⅱ)的续篇,报道11个不同的新组合种。这11个新组合种是:36.寄生在柑桔和黄皮树叶部的柑桔拟盘多毛孢(Pestalotiopsiscitri(Mundk&Kheswala)Y.X.Chencomb.nov);37.寄生在忍冬科荚艹迷属植物的叶部的双纤毛拟盘多毛孢(Pestalotiopsisbicilia(Dearn&Bisby)Y.X.Chencomb.mov.);38.寄生在腰果树叶部的异角状的拟盘多毛孢(Pestalotiopsisheterocornis(Guba)Y.X.Chencomb.nov.);39.寄生在月桂的叶部的孢子器型拟盘多毛孢(Pestalotiopsispycnoides(Alm.&Camara)Y.X.Chencomb.nov.);40.寄生在杜鹃花科的白珠树叶部的白珠树拟盘多毛孢(PestalotiopsisgautheriaeDearn&House)Y.X.Chencomb.nov.);41.寄生在雀梅藤和鼠李叶部的鼠李拟盘多毛孢(Pestalotiopsisrhamani(Celoti)Y.X.Chencomb.nov.);42.  相似文献   

18.
Intact seed of 475 genebank accessions of Citrullus ( C. lanatus var. lanatus and C. lanatus var. citroides) were analyzed for percent oil content using TD-NMR. Extracts from whole seed of 96 accessions of C. lanatus (30 var. citroides, 33 var. lanatus, and 33 egusi), C. colocynthis (n = 3), C. ecirrhosus (n = 1), C. rehmii (n = 1), and Benincasa fistulosa (n = 3) were also analyzed for their fatty acids content. Among the materials analyzed, seed oil content varied from 14.8 to 43.5%. Mean seed oil content in egusi types of C. lanatus was significantly higher (mean = 35.6%) than that of either var. lanatus (mean = 23.2%) or var. citroides (mean = 22.6%). Egusi types of C. lanatus had a significantly lower hull/kernel ratio when compared to other C. lanatus var. lanatus or C. lanatus var. citroides. The principal fatty acid in all C. lanatus materials examined was linoleic acid (43.6-73%). High levels of linoleic acid were also present in the materials of C. colocynthis (71%), C. ecirrhosus (62.7%), C. rehmii (75.8%), and B. fistulosa (73.2%), which were included for comparative purposes. Most all samples contained traces (<0.5%) of arachidonic acid. The data presented provide novel information on the range in oil content and variability in the concentrations of individual fatty acids present in a diverse array of C. lanatus, and its related species, germplasm.  相似文献   

19.
Molecular diversity in Saccharum complex was studied using 195 RAPD markers generated by 12 random primers. Among the Saccharum species, S. officinarum showed a low level of genetic diversity while S. sinense was found to be more diverse. Six taxonomical groups were clearly resolved in the cluster analysis. S. officinarum, S. robustum, S. spontaneum and Erianthus spp. formed discrete groups. S. barberi and S. sinense formed a single cluster, so also Narenga and Sclerostachya. S. officinarum was found to be closer to S. robustum and distant from S. spontaneum. Among the related genera, Sclerostachya was closer to Saccharum while Erianthus was found to be highly divergent from all the Saccharum species. Six of the primers used generated RAPD fragments unique to Erianthus. It is suggested that the Erianthus spp. can contribute substantially towards sugarcane varietal improvement in view of its greater divergence with Saccharum.  相似文献   

20.
BOOK REVIEWS     
Book reviewed in this article.
Heavy Metals in Soils Editor B.J. Alloway.
F.A.O. Soils Bulletin 61: Radioactive fallout in soils, crops and food By F.P.W. Winteringham.
Dynamics of soil organic matter in tropical ecosystems Edited by D.C. Coleman, J.M. Oades and G. Uehara.
Agroforestry for soil conservation By A. Young.  相似文献   

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