• Title/Summary/Keyword: Botany

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Fungi Associated with the Hairs of Goat and Sheep in Libya

  • El-Said, A.H.M.;Sohair, T.H.;El-Hadi, A.G.
    • Mycobiology
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    • v.37 no.2
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    • pp.82-88
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    • 2009
  • The mycoflora on the hair in 25 samples of each of goats and sheep collected from Libya was analyzed using two isolation methods at $25^{\circ}C$. Seventy species and 3 varieties belonging to 31 genera were collected from the two substrates. The hairs of sheep were polluted with fungi than goat, contained high total counts and number of genera and species. Two species of true dermatophytes were isolated namely Trichophyton rubrum and T. terrestre. Several keratiophilic species were isolated of which Chrysosporium indicum, C. keratinophilum and C. tropicum were the most prevalent. The commonest saprophytes in order of frequency were members of the genera Aspergillus, Penicillium, Emericella, Alternaria and Cochliobolus.

Impact of Surface Fire on the Dynamics of N2- Fixing and P - Solubilizing Microbial Population in Natural Grassland Soils, Southern India

  • Manian, S;Paulsamy, S.;Senthilkumar, K.;Kil, Bong-Seop
    • The Korean Journal of Ecology
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    • v.25 no.4
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    • pp.227-234
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    • 2002
  • Dynamics of certain $N_2$ fixing bacteria such as Rhizobium, Azospirillum and Azotobactor, nodule number in dominant legume, Atylosia trinervia, P-solubilizing bacteria, actinomycetes and fungi were studied in unburned and burned site of natural grassland, southern India. Population of $N_2$ - fixing bacteria, P-solubilizing bacteria, fungi and nodule number in legume increased significantly in burned sites. On the other hand, the actino-mycetes population remained unchanged. Thirty six species of fungi with tricalcium phosphate solubilizing ability were recorded. The most efficient P-solubilizing fungi recognised in the soils of the study sites are Absidia ramosa, Gongronella butlerii, Mortieralla spinosa, Mucor racemosus, Rhizopus nigricans, R. stolonifer, R. oryzae, Aspergillus fumigatus, A. nidulans, A. niger, Theilavia terricola and Cheatomium lunasporium.

Four New Compounds From Isodon eriocalyx

  • Wang, Jia;Lin, Zhong-Wen;Shingu, Tetsuro;Sun, Han-Dong
    • Natural Product Sciences
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    • v.4 no.3
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    • pp.143-147
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    • 1998
  • Examination of the chemical constituents of the dried leaves of Isodon eriocalyx (Dunn.) Hara led to the isolation of four new diterpenoids, named maoecrystal Q-T (1-4). Their structures were elucidated as $16(R)-methoxymethyl-6{\beta},\;7{\beta}-dihydroxy-7{\alpha},20-epoxy-ent-kaur-2,3-ethenylene-1$, 15-dione(1), $1{\beta},18-diacetoxy-6{\beta},7{\beta}-dihydroxy-7{\alpha},20-epoxy-ent-kaur-16-en-15-one\;(2),\;6{\beta},\;7{\beta}-dihydroxy-15{\beta}-acetoxy-7{\alpha},20-epoxy-ent-kaur-16-en-1-one$ (3) and $7{\beta}-hydroxy-6{\beta},15{\beta}-diacetoxy-1{\alpha},11{\beta}-acetonide-7{\alpha},20-epoxy-ent-kaur-16-ene$ (4), respectively, on the basis of spectroscopic methods. Meanwhile, five known diterpeonids eriocalyxin B (5), maoecrystal B-D (6-8) and trichokaurin (9) were also obtained.

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Novel approaches for generating and manipulating diploid strains of Chlamydomonas reinhardtii

  • Kariyawasam, Thamali;Joo, Sunjoo;Goodenough, Ursula;Lee, Jae-Hyeok
    • ALGAE
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    • v.34 no.1
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    • pp.35-43
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    • 2019
  • Genetic study of haploid organisms offers the advantage that mutant phenotypes are directly displayed, but has the disadvantage that strains carrying lethal mutations are not readily maintained. We describe an approach for generating and performing genetic analysis of diploid strains of Chlamydomonas reinhardtii, which is normally haploid. First protocol utilizes self-mating diploid strains that will facilitate the genetic analysis of recessive lethal mutations by offering a convenient way to produce homozygous diploids in a single mating. Second protocol is designed to reduce the chance of contamination and the accumulation of spontaneous mutations for long-term storage of mutant strains. Third protocol for inducing the meiotic program is also included to produce haploid mutant strains following tetraploid genetic analysis. We discuss implication of self-fertile strains for the future of Chlamydomonas research.

AN ANALYTICAL STUDIES OF FREE AMINO ACID AND ITS RELATIONSHIP AMONG THE MAIN GROUPS OF GREEN ALGAE On the studies of chemical components and its relationship to the phylogeny of marine algae. (III)

  • Lee, Min-Jai;Hong, Soon-Woo;Lee, In-Kyu
    • Journal of Plant Biology
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    • v.5 no.3
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    • pp.25-29
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    • 1962
  • Succeeding the previous papers, nineteen species of marine green algae and threee species of fresh water green algae are analyzed to the free amino acid patterns by paper chromatogram, and it has been described as containing significant qualities of the pattern in relation to phylogenetic studies. Those seem to have a tendency of recognizable pattern on inter-Orders and inter-Phyla of marine algae. And the patterns of fresh water and marine green algae are also carried out referring to these studies.

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Allelopathic Potential of Adhtoda vasica NEES (Adhatoda visica NEES의 알레로페티 효과)

  • Sajjida, Ayaz;Hussain, Farrukh;Ilahi, Ihsan;Kil, Bong-Seop
    • Journal of Plant Biology
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    • v.32 no.2
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    • pp.109-119
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    • 1989
  • Adhatoda vasica Nees is a shrubby component of tropical and subtropical vegetation in Pakistan. t harbours relatively few unhealthy associated species in and around its thickets. Aqueous extracts, rain leachates, litter from shoots and soil underneath it invariably reduced germination, early growth, biomass, moisture and chlorophyll contents of Pennisetum americanum, Setaria italica, Zea mays, Brassica campestris and Triticum vulgare in different laboratory expreiments. chromatographic analysis revealed the presence of caffeic, ferulic, vanillic, p-coumaric, p-OH-benzoic, and tannic acids in aqueous extracts. The phytotoxicity was related to the test species used, part assayed and parameter measured. It is suggested that the preclusion of the associated species and the dominance of A. vasica is primarily due to allelopathy. Negative grazing also provides better chances for its establishment.

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New hydroperoxylated and 20,24-epoxylated dammarane triterpenes from the rot roots of Panax notoginseng

  • Shang, Jia-Huan;Sun, Wen-Jie;Zhu, Hong-Tao;Wang, Dong;Yang, Chong-Ren;Zhang, Ying-Jun
    • Journal of Ginseng Research
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    • v.44 no.3
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    • pp.405-412
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    • 2020
  • Background: Root rot is a serious destructive disease of Panax notoginseng, a famous cultivated araliaceous herb called Sanqi or Tianqi in Southwest China. Methods: The chemical substances of Sanqi rot roots were explored by chromatographic techniques. MS, 1D/2D-NMR, and single crystal X-ray diffraction were applied to determine the structures. Murine macrophage RAW264.7 and five human cancer cell lines were used separately for evaluating the antiinflammatory and cytotoxic activities. Results and Conclusion: Thirty dammarane-type triterpenes and saponins were isolated from the rot roots of P. notoginseng. Among them, seven triterpenes, namely, 20(S)-dammar-25-ene-24(S)-hydroperoxyl-3β,6α,12β,20-tetrol (1), 20(S)-dammar-3-oxo-23-ene-25-hydroperoxyl-6α,12β,20-triol (2), 20(S)-dammar-12-oxo-23-ene-25-hydroperoxyl-3β,6α,20-triol (3), 20(S)-dammar-3-oxo-23-ene-25-hydroperoxyl-12β,20-diol (4), 20(S),24(R)-epoxy-3,4-seco-dammar-25-hydroxy-12-one-3-oic acid (5), 20(S),24(R)-epoxy-3,4-seco-dammar-25-hydroxy-12-one-3-oic acid methyl ester (6), and 6α-hydroxy-22,23,24,25,26,27-hexanordammar-3,12,20-trione (7), are new compounds. In addition, 12 known ones (12-16 and 19-25) were reported in Sanqi for the first time. The new Compound 1 showed comparable antiinflammatory activity on inhibition of NO production to the positive control, whereas the known compounds 9, 12, 13, and 16 displayed moderate cytotoxicities against five human cancer cell lines. The results will provide scientific basis for understanding the chemical constituents of Sanqi rot roots and new candidates for searching antiinflammatory and antitumor agents.

A Study on the Chemical Components of Zanthoxylum coreanum Nakai(Rutaceae) (왕초피나무의 성분연구(成分硏究))

  • Kim, Chang-Min;Huh, In-Ok
    • Korean Journal of Pharmacognosy
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    • v.12 no.1
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    • pp.5-11
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    • 1981
  • The five fractions from the barks of Zanthoxylum coreanum in Je-ju Island are examined in detail chromatographically in this paper. 37 compounds are detected in all of the fractions, and the compounds from each of fractions are found to be presumed that this plant is classified into the same group as that of the temperate Zanthoxylum taxa but is different from the tropical zanthoxylum taxa by its chemical components.

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Chlorococcales (Chlorophyceae) of Eastern and North-eastern States of India

  • Jena, Mrutyunjay;Adhikary, Siba Prasad
    • ALGAE
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    • v.22 no.3
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    • pp.167-183
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    • 2007
  • Fifty-six taxa of chlorococcales were recorded from different water bodies of eastern and north-eastern states of India. These belong to 21 genera, e.g. Chlorococcum (1), Truebaria (1), Pediastrum (9), Hydrodictyon (1), Botrycoccus (1), Coenochloris (1), Radiococcus (1), Coenocystis (1), Oocystis (1), Glaucocystis (1), Chlorella (1), Kirchneria (2), Kirchnereilla (1) Ankistrodesmus (10), Coelastrum (3), Actinastrum (2), Tetrastrum (1), Crucigenia (1), Crucigeniella (1) Desmodesmus (6) and Scenedesmus (9). All these species were recorded first time from this region and out of these 16 species reported first from India.