Eyespot development on butterfly wings: the epidermal response to damage

Article Abstract:

A gradient model of ectopic eyespots in butterfly wings suggests that asymmetry of the eyespot is due to epidermal damage near its focus and transient damage results due to extensive nonfocal operations. Epidermal damages occurring after 12 to 18 hr of operation do not influence ecotopic eye spot size. The multidirectional spreading of eyespots is prevented by subjecting the focal cell signaling to 'wound effects.'

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Arrest of stomatal initials in Tradescantia is linked to the proximity of neighboring stomata and results in the arrested initials acquiring properties of epidermal cells

Article Abstract:

Analysis of the arrest of developing stomata in the leaves of the monocotyledon Tradescantia indicates a linear distribution of the arrested stomata, the distance between them being less than that between mature stomata. Any variations in the cell do not affect these stomata, which differentiate in the epidermal cell pathway, suggesting their ability to retain their pluripotential even after primary specification.

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Linear aggregations of stomata and epidermal cells in Tradescantia leaves: evidence for their group patterning as a function of the cell cycle

Article Abstract:

Experimental studies on cell patterns in the monocot Tradescantia's leaf reveal a constant member of linear groups of epidermal cells and stomata of identical incidence, concurrent with Charlton's hypothesis that the position of the cells influences the cell pattern. The synchronous nature of the cell cycle is retained by the cell lineages, and hence by the linearly arranged stomata.

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