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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111 Citations
Highly Influential Citations
13
Background Citations
74
Methods Citations
3
Results Citations
3

111 Citations

Heteroblasty and preformation in mayapple, Podophyllum Peltatum (Berberidaceae): developmental flexibility and morphological constraint.
TLDR
Heteroblasty appears to facilitate developmental flexibility prior to the point where shoot growth becomes constrained by preformation of determined aerial structures in mayapple, suggesting that late developmental determination of leaves at positions 12 and 13 reflects ontogenetic sensitivity to a transition to flowering.
Heteroblasty in the moss, Aphanoregma patens (Physcomitrella patens), results from progressive modulation of a single fundamental leaf developmental programme
TLDR
Leaf heteroblasty in Physcomitrella probably results from modulation of a single developmental programme by external and/or internal forces, which alter progressively in intensity as a gametophore grows.
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.
Vegetative phase change and photosynthesis in Eucalyptus occidentalis: architectural simplification prolongs juvenile traits.
TLDR
Observations support the hypothesis that the complexity of shoot architecture impacts the rate of vegetative phase change, but does not affect reproductive phase change in this species.
Heteroblasty—A Review
TLDR
This review develops a conceptual framework for future scientific work, proposes a quantitative index of heteroblasty, and discusses the evidence for developmental regulation, functional significance, and evolutionary implications ofheteroblasty to provide a stimulating basis for further research with this fascinating group of plants.
Genetic and physiological analysis of juvenility in plants
TLDR
This study exploits Antirrhinum and Arabidopsis as model systems to understand the genetic and environmental factors that regulate floral incompetence during the JVP and a relationship between photosynthetic assimilate levels and vegetative phase transition was revealed.
Attainment of reproductive competence, phase transition, and quantification of juvenility in mutant genetic screens
TLDR
Plant development between seedling emergence and flowering is characterized by a series of successive qualitative phases, one of which is a photoperiod-insensitive post-inductive phase, in which plant development is no longer influenced byPhotoperiod.
Ontogenetic trends in the morphological features of main stem annual shoots of Pinus pinaster (Pinaceae).
TLDR
Two main phases of development corresponding respectively to the juvenile vegetative and adult reproductive stages were identified, and the transition between both occurred in 9-yr-old trees.
Population divergence for heteroblasty in the Canary Island pine (Pinus canariensis, Pinaceae).
TLDR
The prolonged juvenile phase of the Canary Island pine is interpreted as an unavoidable trade-off for the high tolerance of adults to harsh environments through differential resource allocation and the cost of sclerophylly and resprouting.
Vegetative phase change and shoot maturation in plants.
  • R. Poethig
  • Environmental Science
    Current topics in developmental biology
  • 2013
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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…
Juvenility and maturation in conifers: current concepts.
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…
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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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