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Meiospores produced in sori of nonsporophyllous laminae of Macrocystis Pyrifera (Laminariales, Phaeophyceae) may enhance reproductive output

journal contribution
posted on 2023-05-17, 22:29 authored by Leal, PP, Catriona HurdCatriona Hurd, Roleda, MY
Different lamina of Macrocystis pyrifera sporophytes (i.e., sporophylls, pneumatocyst-bearing blades, and apical scimitars) in a wave-sheltered site were found to be fertile. We quantified their sorus surface area, reproductive output (number of spores released) and the viability of released spores (germination rate). Sorus area was greatest on the sporophylls, with sporangia developing on >57% of the total area and smallest on the pneumatocyst-bearing blades with 21% of the total area bearing sporangia. The apical scimitar released the greatest number of meiospores (cells · mL−1 · cm−2) and the sporophylls the least. Meiospores produced from all types of fertile laminae were equally viable. This reproductive plasticity may enhance reproductive output, and contribute to short and long-distance spore dispersal and the cryptic gametophyte propagule bank for the next generation of sporophytes.

History

Publication title

Journal of Phycology

Volume

50

Pagination

400-405

ISSN

0022-3646

Department/School

Institute for Marine and Antarctic Studies

Publisher

Blackwell Publishing Inc

Place of publication

350 Main St, Malden, USA, Ma, 02148

Rights statement

Copyright 2014 Phycological Society of America

Repository Status

  • Restricted

Socio-economic Objectives

Ecosystem adaptation to climate change

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    University Of Tasmania

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