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Annals of Botany 67: 555-559, 1991
© 1991 Annals of Botany Company

RESEARCH-ARTICLE

Plastid Tubules in the Sporogenous Lineage of the Moss Timmiella barbuloides (Bryophyta): An Ultrastructural Study

RAFFAELE GAMBARDELLA and FLORA ALFANO

Dipartimento di Biologia Vegetale, Universita di Napoli Via Foria 223, 80139 Napoli, Italy

Accepted: 26 February 1991   

Tubular inclusions are ubiquitous in the sporogenous plastids of the moss Timmiella barbuloides (Brid.) Moenk. They have an outer diameter of 26–40 nm and a central lumen of 10–15 nm, and occur either singly or in groups of up to 15 parallel elements in the peripheral stroma. The tubules are associated with the central isthmus in dividing plastids but lie close to the extremities during the growth phase. These positional changes suggest roles in plastid division, growth and the maintenance of shape.

Bryophytes, mosses, Timmiella barbuloides, sporogenous cell lineage, plastid tubules, ultrastructure


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