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[Genetic instability in Portulaca grandiflora (Hook)]

B D Rossi-Hassani1, J P Zryd

  • 1Laboratoire de Phytogénétique Cellulaire, Université de Lausanne, Dorigny, Suisse.

Annales De Genetique
|January 1, 1994
PubMed
Summary

Portulaca grandiflora flowers exhibit variegation due to unstable mutations linked to transposable elements. Genetic analysis of betalain synthesis loci (cml and rml) reveals insights into these mutable genes.

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Area of Science:

  • Plant genetics
  • Molecular biology
  • Pigment biosynthesis

Context:

  • Portulaca grandiflora, a Centrospermae plant, synthesizes betalain pigments in petals and stems.
  • Variegation patterns observed in Portulaca grandiflora corollas suggest genetic instability.
  • Transposable elements are hypothesized to be involved in these unstable mutations.

Purpose:

  • To investigate the genetic basis of variegation in Portulaca grandiflora.
  • To analyze the role of transposable elements in unstable mutations affecting betalain synthesis.
  • To genetically characterize the unstable loci cml and rml involved in pigment production.

Summary:

  • This study examines variegated Portulaca grandiflora clones, focusing on betalain pigment production.
  • Genetic analysis of unstable loci (cml and rml) involved in betalain synthesis was performed.
  • The research explores the link between unstable mutations, transposable elements, and flower variegation patterns.

Impact:

  • Provides a deeper understanding of genetic instability and pigment variation in plants.
  • Contributes to the knowledge of transposable element activity in Portulaca grandiflora.
  • Offers insights into the molecular mechanisms underlying variegation and betalain biosynthesis.

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