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Journal ArticleDOI

In vitro development of the isolated shoot apical meristem of angiosperms.

01 May 1970-American Journal of Botany (John Wiley & Sons, Ltd)-Vol. 57, Iss: 5, pp 562-568
About: This article is published in American Journal of Botany.The article was published on 1970-05-01. It has received 107 citations till now. The article focuses on the topics: Sympodial & Axillary bud.
Citations
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Journal ArticleDOI
TL;DR: The monopteros (mp) gene contributes to apical-basal pattern formation in the Arabidopsis embryo as discussed by the authors, and the absence of a morphological axis seems to be responsible for variable positioning of cotyledons.
Abstract: The monopteros (mp) gene contributes to apical-basal pattern formation in the Arabidopsis embryo. mp mutant seedlings lack basal body structures such as hypocotyl, radicle and root meristem, and this pattern deletion has been traced back to alterations in the octant-stage embryo. Cells of the embryo proper and the uppermost cell of the suspensor fail to establish division patterns that would normally generate the basal body structures. The resulting absence of a morphological axis seems to be responsible for another phenotypic trait of mp seedlings, variable positioning of cotyledons. This relationship is suggested by weak mp seedling phenotypes in which the presence of a short hypocotyl is correlated with normal arrangement of cotyledons. Root formation has been induced in mp seedlings grown in tissue culture. This result supports the notion that the mp gene is required for organising the basal body region, rather than for making the root, in the developing embryo.

558 citations


Cites background from "In vitro development of the isolate..."

  • ...By contrast, mp mutations do not interfere with the regenerative pathway of root formation that can be induced experimentally in various tissues (Smith and Murashige, 1970; Feldman, 1976; Feldman and Torrey, 1976; Schiavone and Racusen, 1991)....

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BookDOI
01 Jan 1995
TL;DR: The origin and development of banana and plantain cultivation, breeding and management, and the response of the plant to the environment are explained.
Abstract: Preface. The origin and development of banana and plantain cultivation. Systems of cultivation and management. Molecular markers, genetic diversity and systematics in Musa. Musa genetics. Banana and plantain breeding. In vitro culture of bananas. Banana morphology - part I: roots and rhizomes. Banana morphology - part II: the aerial shoot. The response of the plant to the environment. Soils. Banana nutrition. Banana diseases. Pests. Harvesting and fruit care. Ripening and biochemistry of the fruit. The nutritional value of bananas. Banana processing. Banana and plantain in the East African highlands. The world banana economy. Index.

351 citations

Journal ArticleDOI
Ian M. Sussex1
27 Jan 1989-Cell

217 citations

Journal ArticleDOI
11 Mar 1994-Science
TL;DR: The cell wall appears to maintain the differentiated state and to direct cell fate in plant development through removal of protoplasts from the cell wall induced dedifferentiation.
Abstract: In multicellular plants, development starts with an asymmetric division of the zygote into two differentiated cells. The nature and distribution of fate-determining factors operating during embryogenesis remain largely obscure. Laser microsurgery was used here to dissect two-celled embryos of the alga Fucus spiralis. Removal of protoplasts from the cell wall induced dedifferentiation. However, isolated cells within the walls followed their restricted fate. Moreover, contact of one cell type with the isolated cell wall of the other cell type caused its fate to be switched. The cell wall thus appears to maintain the differentiated state and to direct cell fate in plant development.

205 citations

Book ChapterDOI
01 Jan 1992
TL;DR: This chapter attempts to provide a description of the structure of the potato plant, including both external morphology and internal anatomy, as well as investigating the development of the tuber.
Abstract: This chapter attempts to provide a description of the structure of the potato plant, including both external morphology and internal anatomy. Since the existing literature appeared to be particularly deficient on developmental aspects, some re-examination of early stages of development has been made where possible. Notwithstanding the considerable morphological and anatomical literature, it is clear that the structure and development of the potato, admittedly a very complex plant, are by no means fully understood; strangely enough, this applies particularly to the development of the tuber, despite its economic importance. There is considerable scope for further work in this field.

171 citations

References
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Journal ArticleDOI
TL;DR: The primary Organization of the Shoot Apex and Seasonal Changes are described, which reflect the changing environment during the shooting season.
Abstract: III. Primary Organization of the Shoot Apex .. V Terow hi n dologiyhe Sh o - -. .-... ...... ...... ..----.... is III. Prim~~~a r y Og en eztic n o h ho A sp e ct .... ........ ..-. ----... 10 IV. G owth and Form in the Shoot .15 (a) Genetic Aspects 1.. . . .. ......5.... ..... . 15 (b) Ontogenetic Changes 18 (c) Factors A ffecting Shoot Form 2.....4 ........ 24 (d) Seasonal Changes ........ ... .. ... 31 (e) C on clu sion s 33 ..... 33

105 citations

Journal ArticleDOI
TL;DR: It is suggested that an accumulation of somatic mutations, i.e., genetic alterations resulting in reductions in the morphogenetic potential of cells, is a basis underlying senescence.
Abstract: Decreases in the growth and organ-forming capacities characterized continuously cultured tobacco (Nicotiana tabacum 'Wisconsin 38') callus The root-initiation ability was completely lost in l 2-year-old cultures The rate of shoot formation decreased to a low plateau in cultures that reached 1'2-3 years of age since the explanting An inverse relationship between callus growth and in vitro clonal age was also observed Studies with callus clones started from individually isolated pith cells showed that the growth and organ-forming potentials of somatic cells varied, signifying that cell alterations had occurred in vivo Both totipotent and non-totipotent cell lines were obtained Subculturing the single-cell lines through several passages disclosed that the morphogenetically depressed state was irreversible and instability was characteristic of the totipotent lines In the latter, a change toward the morphogenetically repressed level was observed These findings are discussed in relation to the phenomenon of senescence It is suggested that an accumulation of somatic mutations, ie, genetic alterations resulting in reductions in the morphogenetic potential of cells, is a basis underlying senescence

82 citations