Plastid Tubules in the Sporogenous Lineage of the Moss Timmiella barbuloides (Bryophyta): An Ultrastructural Study |
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Authors: | GAMBARDELLA, RAFFAELE ALFANO, FLORA |
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Affiliation: | Dipartimento di Biologia Vegetale, Universita di Napoli Via Foria 223, 80139 Napoli, Italy |
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Abstract: | Tubular inclusions are ubiquitous in the sporogenous plastidsof the moss Timmiella barbuloides (Brid.) Moenk. They have anouter diameter of 2640 nm and a central lumen of 1015nm, and occur either singly or in groups of up to 15 parallelelements in the peripheral stroma. The tubules are associatedwith the central isthmus in dividing plastids but lie closeto the extremities during the growth phase. These positionalchanges suggest roles in plastid division, growth and the maintenanceof shape. Bryophytes, mosses, Timmiella barbuloides, sporogenous cell lineage, plastid tubules, ultrastructure |
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