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Menon MK, Bell PR. Ultrastructural and cytochemical aspects of induced apogamy following abscisic acid pre-treatment of secondary moss protonema. Planta. 1981;151(5):427-33doi: 10.1007/BF00386535.
Menon, M. K., & Bell, P. R. (1981). Ultrastructural and cytochemical aspects of induced apogamy following abscisic acid pre-treatment of secondary moss protonema. Planta, 151(5), 427-33. https://doi.org/10.1007/BF00386535
Menon, M K, and Bell, P R. "Ultrastructural and cytochemical aspects of induced apogamy following abscisic acid pre-treatment of secondary moss protonema." Planta vol. 151,5 (1981): 427-33. doi: https://doi.org/10.1007/BF00386535
Menon MK, Bell PR. Ultrastructural and cytochemical aspects of induced apogamy following abscisic acid pre-treatment of secondary moss protonema. Planta. 1981 May;151(5):427-33. doi: 10.1007/BF00386535. PMID: 24302107.
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Planta. 1981 May;151(5):427-33. doi: 10.1007/BF00386535.

Ultrastructural and cytochemical aspects of induced apogamy following abscisic acid pre-treatment of secondary moss protonema.

Planta

M K Menon, P R Bell

Affiliations

  1. Botany and Microbiology, University College, Gower Street, WC1E 6BT, London, U.K..

PMID: 24302107 DOI: 10.1007/BF00386535

Abstract

Abscisic acid (ABA) treatment of secondary protonema of Physcomitrium pyriforme Brid in the presence of sucrose does not prevent cell division but results in shorter cells with vesicular cytoplasm and an accumulation of lipid. When transferred to sucrose medium without ABA and with low irradiance isodiametric intercalary cells are cut off which give rise to apogamous sporophytes either directly or after the formation of a small amount of callus. The organization of the cells leading up to the apogamous sporophyte is described. The cells initiating the sporophyte develop dense cytoplasm and the walls become labyrinthine and callosed, but they do not form any recognizable placenta. It is proposed that labyrinthine walls are a consequence of a perturbation of cell wall metabolism as growth changes from gametophytic to sporophytic. The use of the term "transfer cell" for this kind of cell is questioned and the need for a causal approach to the investigation of labyrinthine walls is stressed.

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