Floral Organogenesis in Three Members of the Tribe Delphinieae (Ranunculaceae)

Hongli Chang, Stephen R. Downie, Hongli Peng, Fengjie Sun

Research output: Contribution to journalArticle

Abstract

Three species (Aconitum taipeicum, Delphinium giraldii, and Consolida ajacis) of the tribe Delphinieae (Ranunculaceae) were examined using scanning electron microscopy and histological methods. The results showed that members of Delphinieae differ from their polysymmetrical relatives by four unique features: (1) a spiral phyllotaxis of their perianth and stamens, and a series of carpels, which initiated superficially in a whorl-liked arrangement; (2) sepal 2 being the largest one among the five sepals and becoming helmet-shaped or having a spur; (3) petals 2 and 5 initiated adaxially of sepal 2 and also becoming spurred; and (4) the monosymmetry of the first flower becoming established when sepal 2 becomes the largest. Major differences among the species include the timing of development of the second series; the fusion of two petals into a single one in C. ajacis; and, during early developmental stages, the two young spurred petals giving rise to a stalk and two bulges in A. taipeicum, a single bulge in D. giraldii, or an arch blade in C. ajacis. The unequal growth of the perianth, together with the reduction and the rearrangement of the carpels, are critical in inducing the symmetrical transformation of the flowers.

Original languageEnglish (US)
Article number493
JournalPlants
Volume8
Issue number11
DOIs
StatePublished - Nov 11 2019

Fingerprint

Consolida ajacis
Ranunculaceae
organogenesis
calyx
flower
corolla
perianth
carpels
developmental stage
arch
scanning electron microscopy
Delphinium
phyllotaxy
Aconitum
flowers
stamens
interspecific variation
developmental stages
method
young

Keywords

  • Aconitum
  • Consolida
  • Delphinieae
  • Delphinium
  • Floral organogenesis
  • Monosymmetry
  • Ranunculaceae

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Ecology
  • Plant Science

Cite this

Floral Organogenesis in Three Members of the Tribe Delphinieae (Ranunculaceae). / Chang, Hongli; Downie, Stephen R.; Peng, Hongli; Sun, Fengjie.

In: Plants, Vol. 8, No. 11, 493, 11.11.2019.

Research output: Contribution to journalArticle

Chang, Hongli ; Downie, Stephen R. ; Peng, Hongli ; Sun, Fengjie. / Floral Organogenesis in Three Members of the Tribe Delphinieae (Ranunculaceae). In: Plants. 2019 ; Vol. 8, No. 11.
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