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Journal ArticleDOI

In vitro propagation of Mitragyna parvifolia Korth.

01 Mar 1988-Plant Cell Tissue and Organ Culture (Kluwer Academic Publishers)-Vol. 12, Iss: 1, pp 75-80
TL;DR: In vitro regenerated shoots rooted when cultured on modified Murashige and Skoog's medium containing low inorganic salts and the three auxins and Regeneration by this method was suitable for mass propagation of the plant.
Abstract: Multiple shoot formation and their elongation from excised apical vegetative shoots of a 40-year old-tree ofMitragyna parvifolia Korth. was achieved in Murashige and Skoog's medium supplemented with 4.44 μM benzyl adenine. The in vitro regenerated shoots rooted when cultured on modified Murashige and Skoog's medium containing low inorganic salts and the three auxins. Regeneration by this method was suitable for mass propagation of the plant.
Citations
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Journal ArticleDOI
01 May 1948-Nature
TL;DR: The Geography of the Flowering Plants as discussed by the authors is devoted to salient facts of the distribution of families, genera and species, where many of the striking features of extended range, discontinuity and endemism are assembled and illustrated with more than forty maps portraying various types of occurrence, from the extended tropical range of the Palmae and the cosmopolitan genus Drosero, to the discontinuity of the Magnoliacese or that of Saxifraga geum and Dabœcia polifolium.
Abstract: THIS book, as the author himself states, "is devoted to plant geography in the narrower sense", plant ecology being outside its scope. As a consequence, the treatment is essentially factual in character rather than causal, and static rather than dynamic. The difficulties of any attempt at such restriction are at once apparent, despite the inclusion of chapters on geological history and plant distribution and a section devoted to the factors of distribution. However, within these limits the author has collected together many of the facts concerning the distribution of taxonomic aggregates over the earth‘s surface which will be a welcome addition to the botanist‘s library, the more so that much of the literature of the subject is widely scattered. More than a third of the text is devoted to salient facts of the distribution of families, genera and species, where many of the striking features of extended range, discontinuity and endemism are assembled and illustrated with more than forty maps portraying various types of occurrence, from the extended tropical range of the Palmae and the cosmopolitan genus Drosero, to the discontinuity of the Magnoliacese or that of Saxifraga geum and Dabœcia polifolium. The Geography of the Flowering Plants By Prof. Ronald Good. Pp. 403 + 25 plates. (London, New York and Toronto: Longmans, Green and Co., Ltd., 1947.) 30s. net.

244 citations

Book ChapterDOI
01 Jan 1991
TL;DR: There is an urgent need for larger numbers of improved, fast-growing trees, and the tree improvement programs underway and the clonal propagation methods available offer only limited possibilities of achieving this goal.
Abstract: The forests account for 29–34% of the land area on earth (FAO, 1963). Of this area approximately 60% are gymnosperms or softwoods; some 38% are angiosperms or hardwoods, with the remaining being made up of mixed forests. While most of the harvested material is used industrially, a significant portion of the hardwoods is utilized for fuel on a worldwide basis. It is generally accepted that the forests are being harvested at a faster rate than they are being regenerated, either naturally or artificially, hence, a shortage of wood and wood products has been forecasted for the end of this century (Keays, 1974). In addition, the rapid and disastrous effects of diseases, pests, and fires may jeopardize the very existence of certain tree species. Thus, there is an urgent need for larger numbers of improved, fast-growing trees (Thorpe & Biondi, 1984). At present, the tree improvement programs underway and the clonal propagation methods available offer only limited possibilities of achieving this goal.

195 citations

Journal ArticleDOI
TL;DR: Cleistanthus collinus Benth.
Abstract: Cleistanthus collinus Benth. was micropropagated using nodal explants on MS medium supplemented with 2.2 μM benzyladenine (BA). April to June was the best time for initiating shoot cultures. Shoot proliferation was enhanced when the BA concentration was lowered to 1.1 μM. Rooting was achieved on half-strenth MS medium with 22.8 μM indole-3-acetic acid for 7 days and continuous darkness for the first 72 h of the 7 days.

40 citations

Journal ArticleDOI
TL;DR: Seedlings were grown in vitro from embryos of Dipterocarpus alatus and D. intricatus and Cotyledonary nodes, excised from the seedlings, were induced to form axillary shoots and in the case of D. elaboratus these could be multiplied rapidly.
Abstract: Seedlings were grown in vitro from embryos of Dipterocarpus alatus and D. intricatus. The problem of explant browning could be overcome by growing embryos initially on a filter paper bridge in liquid medium with activated charcoal. The best basal medium was Woody Plant Medium without the ammonium nitrate. Cytokinin appeared to stimulate seedling growth, 5×10-5 M 2-isopentenyladenine and 10-4 M 6-benzyladenine (BA) being the optimum concentrations for D. alatus and D. intricatus respectively. Cotyledonary nodes, excised from the seedlings, were induced to form axillary shoots and in the case of D. intricatus these could be multiplied rapidly. D. intricatus shoots elongated by reducing the BA level from 10-5 M to 5×10-7 M. Roots developed when shoots were dipped in 10-3 M indolebutyric acid for two minutes and subsequently grown in liquid medium supported by a filter paper bridge.

38 citations


Cites background from "In vitro propagation of Mitragyna p..."

  • ...1983) but others have found it necessary for mature explants (Ravishankar Rai & Jagadish Chandra 1988; Roy et al. 1988)....

    [...]

References
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Journal ArticleDOI
TL;DR: In vivo redox biosensing resolves the spatiotemporal dynamics of compartmental responses to local ROS generation and provide a basis for understanding how compartment-specific redox dynamics may operate in retrograde signaling and stress 67 acclimation in plants.
Abstract: In experiments with tobacco tissue cultured on White's modified medium (basal meditmi hi Tnhles 1 and 2) supplemenk'd with kiticthi and hidoleacctic acid, a slrikin^' fourlo (ive-told intTease iu yield was ohtaitu-d within a three to Tour week j^rowth period on addition of an aqtteotis exlrarl of tobacco leaves (Fi^'ures 1 and 2). Subse(iueutly it was found Ihiit this jnoniotiou oi' f^rowih was due mainly though nol entirely to inorj^auic rather than organic con.stitttenls in the extract. In the isolation of Rrowth factors from plant tissues and other sources inorj '̂anic salts are fre(|uently carried along with fhe organic fraclioits. When tissue cultures are used for bioassays, therefore, il is necessary lo lake into account increases in growth which may result from nutrient elements or other known constituents of the medium which may he present in the te.st materials. To minimize interference trom rontaminaitis of this type, an altempt has heen made to de\\eh)p a nieditmi with such adequate supplies of all re(iuired tnineral nutrients and cotntnott orgattic cottslitueitls that no apprecial»le change in growth rate or yield will result from the inlroduclion of additional amounts in the range ordinarily expected to be present in tnaterials to be assayed. As a point of referetice for this work some of the culture media in mc)st common current use will he cotisidered briefly. For ease of comparis4)n Iheir mineral compositions are listed in Tables 1 and 2. White's nutrient .solution, designed originally for excised root cultures, was based on Uspeuski and Uspetiskaia's medium for algae and Trelease and Trelease's micronutrieni solution. This medium also was employed successfully in the original cttltivation of callus from the tobacco Iiybrid Nicotiana gtauca x A', tanijadorffii, atitl as further modified by White in 194̂ ^ and by others it has been used for the

63,098 citations

01 Jan 1962

16,251 citations


"In vitro propagation of Mitragyna p..." refers methods in this paper

  • ...Explants were cultured in Murashige and Skoog medium (MS) [8] containing a range of concentrations of auxins: indole-3-acetic acid (IAA) (2....

    [...]

Book
01 Jan 1956

5,524 citations


"In vitro propagation of Mitragyna p..." refers background in this paper

  • ...(Rubiaceae) is a tall forest tree, a popular avenue tree, a useful fuel and timber yielder, and a medicinal plant [1]....

    [...]

Book
01 Jan 1947
TL;DR: The geography of the flowering plants as discussed by the authors, the geography of flowering plants, the geographical location of the plants, and the geographical distribution of the species of plants in the world, are discussed in detail.
Abstract: The geography of the flowering plants , The geography of the flowering plants , مرکز فناوری اطلاعات و اطلاع رسانی کشاورزی

470 citations

Journal ArticleDOI
01 May 1948-Nature
TL;DR: The Geography of the Flowering Plants as discussed by the authors is devoted to salient facts of the distribution of families, genera and species, where many of the striking features of extended range, discontinuity and endemism are assembled and illustrated with more than forty maps portraying various types of occurrence, from the extended tropical range of the Palmae and the cosmopolitan genus Drosero, to the discontinuity of the Magnoliacese or that of Saxifraga geum and Dabœcia polifolium.
Abstract: THIS book, as the author himself states, "is devoted to plant geography in the narrower sense", plant ecology being outside its scope. As a consequence, the treatment is essentially factual in character rather than causal, and static rather than dynamic. The difficulties of any attempt at such restriction are at once apparent, despite the inclusion of chapters on geological history and plant distribution and a section devoted to the factors of distribution. However, within these limits the author has collected together many of the facts concerning the distribution of taxonomic aggregates over the earth‘s surface which will be a welcome addition to the botanist‘s library, the more so that much of the literature of the subject is widely scattered. More than a third of the text is devoted to salient facts of the distribution of families, genera and species, where many of the striking features of extended range, discontinuity and endemism are assembled and illustrated with more than forty maps portraying various types of occurrence, from the extended tropical range of the Palmae and the cosmopolitan genus Drosero, to the discontinuity of the Magnoliacese or that of Saxifraga geum and Dabœcia polifolium. The Geography of the Flowering Plants By Prof. Ronald Good. Pp. 403 + 25 plates. (London, New York and Toronto: Longmans, Green and Co., Ltd., 1947.) 30s. net.

244 citations


"In vitro propagation of Mitragyna p..." refers background in this paper

  • ...The plant is found growing in West and East Africa, India, South East Asia, and often in Australasia and Pacific islands [4]....

    [...]