Tissue partitioning during leaf development in ornamentally-grown Frithia pulchra (Mesembryanthemaceae), a 'window plant'

Morre Randy, Langenkamp Myra

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

Young (i.e. 5-mm long) leaves of the window-plant Frithia pulchra (Mesembryanthemaceae) allocate approx, 21 % of their volume to epidermis, 49 % to chlorenchyma, and 29 % to window tissue. By the time leaves are 25 mm long, the relative volumes of epidermis and chlorenchyma decrease to approx, 7 and 27 % respectively. During the same period, the relative volume of window tissue increases from 29 to 66 %. The relative volumes of epidermis, window, and chlorenchyma tissues do not change as leaf length increases from 25 to 57 mm. These results indicate that early stages of leaf development in F. pulchra involve preferential reallocations of volume to different tissues, whereas later stages of leaf development involve uniform expansion of all of the leaf's tissues (i.e. the relative volumes of tissues do not change). The relative volumes of epidermis and window are always largest in the lower third of a leaf. The relative volume of chlorenchyma is largest in the upper third of young leaves but becomes constant in the upper two thirds of leaves during later stages of development. These results, indicating that leaves and tissues of F. pulchra are asymmetric and develop polarly, are discussed relative to corresponding studies of cellular size and leaf structure.

Original languageEnglish (US)
Pages (from-to)279-283
Number of pages5
JournalAnnals of Botany
Volume67
Issue number4
DOIs
StatePublished - Apr 1991
Externally publishedYes

Keywords

  • Frithia pulchra
  • Leaf development
  • Mesembryanthemaceae
  • Stereology
  • Window plant

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