An Essay on Juvenility, Phase Change, and Heteroblasty in Seed Plants

@article{Jones1999AnEO,
  title={An Essay on Juvenility, Phase Change, and Heteroblasty in Seed Plants},
  author={Cynthia S. Jones},
  journal={International Journal of Plant Sciences},
  year={1999},
  volume={160},
  pages={S105 - S111}
}
  • Cynthia S. Jones
  • Published 1 November 1999
  • Psychology
  • International Journal of Plant Sciences
Phase change (the change from nonreproductive to reproductive status) and heteroblasty (ontogenetic changes in vegetative metamers) are two determinants of longitudinal asymmetry in plants. These concepts are critically important to understanding the regulation of plant development as well as morphological evolution and life‐history variation. Since Goebel, the two have been conflated. This article questions how phase change and heteroblasty are delimited and explores some of the problems that… 
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    Current topics in developmental biology
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References

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Phase change, the transition from juvenility to maturity, is an intriguing phenomenon in plant development that is observed most widely, but not exclusively, in woody perennial plants. As a plant
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TLDR
The primary causes of maturation in woody plants are reviewed, with emphasis on gene expression and its role in cell determination during the maturation process, with reference to several maturation models.
Heteroblastic Development in the Water Hyacinth Eichhornia crassipes Solms.
The first leaves produced by a water hyacinth seedling are linear-lanceolate, whereas adult foliage leaves are laminate-petiolate. Between these two extreme leaf types is a series of transitional
Phase Change in Higher Plants and Somatic Cell Heredity
TLDR
There is now limited evidence suggesting that the chromosomes are the site of such discontinuous and potentially reversible ontogenetic changes, and it is assumed that in addition to the genes, which are stable, the chromosomes also contain self-perpetuating accessory materials that undergo paramutation in an orderly way in somatic cells as an essential aspect of a nucleo-cytoplasmic system of morphogenetic determination.
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TLDR
The process of maturation in woody plants is discussed, with emphasis on methods for reversal of the process, including use of plant growth regulators and tissue culture.
Heteroblasty and the Evolution of Flowering Phenologies
  • P. Diggle
  • Environmental Science
    International Journal of Plant Sciences
  • 1999
TLDR
A review of the available literature shows that dissociation and addition/deletion do occur in association with changes in flowering phenology, and that response to selection for earlier or later flowering is potentially constrained.
Heteroblastic development in cormophytes
TLDR
Although originally applied to the development of plants with a fairly abrupt change from the juvenile to the adult state, the term heteroblastic is now usually extended to cover the more frequent course of development in which the differences between the two phases are gradually established.
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TLDR
The intermediate character of the structures produced during phase changes and the phenotypes of mutations that affect this process demonstrate that these phases are specified by independently regulated, overlapping developmental programs.
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TLDR
The intermediate character of the structures produced during phase changes and the phenotypes of mutations that affect this process demonstrate that these phases are specified by independently regulated, overlapping developmental programs.
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TLDR
This study shows that the onset of flowering can be altered independently from the vegetative transition in leaf form in at least one genotype of Pisum in response to different environments and identifies 9 mutations that act in a heterochronic manner to produce dramatic morphological changes that can be described as progenesis, neoteny, hypermorphosis or acceleration.
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