Understanding the sexual recruitment of one of the oldest and largest organisms on Earth, the seagrass Posidonia oceanica.

The seagrass Posidonia oceanica is considered one of the oldest and largest living organisms on Earth. Notwithstanding, given the difficulty of monitoring its fruits and seeds in the field, the development of P. oceanica during its sexual recruitment is not completely understood. We studied the stag...

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Main Authors: Laura Guerrero-Meseguer, Carlos Sanz-Lázaro, Arnaldo Marín
Format: Article
Language:English
Published: Public Library of Science (PLoS) 2018-01-01
Series:PLoS ONE
Online Access:http://europepmc.org/articles/PMC6239318?pdf=render
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spelling doaj-2aa0e58aa7da4198a64b33567460ed632020-11-24T21:08:13ZengPublic Library of Science (PLoS)PLoS ONE1932-62032018-01-011311e020734510.1371/journal.pone.0207345Understanding the sexual recruitment of one of the oldest and largest organisms on Earth, the seagrass Posidonia oceanica.Laura Guerrero-MeseguerCarlos Sanz-LázaroArnaldo MarínThe seagrass Posidonia oceanica is considered one of the oldest and largest living organisms on Earth. Notwithstanding, given the difficulty of monitoring its fruits and seeds in the field, the development of P. oceanica during its sexual recruitment is not completely understood. We studied the stages of development of P. oceanica seeds from their dispersion in the fruit interior to their settlement in sediment through histological, ultrastructural and mesocosm experiments. P. oceanica sexual recruitment can be divided into three main stages that focus on maximising photosynthesis and anchoring the seedlings to the sediment. In the first stage (fruit dispersion), seeds perform photosynthesis while being transported inside the fruit along the sea surface. In the second stage (seed adhesion), seeds develop adhesive microscopic hairs that cover the primary and secondary roots and favour seed adhesion to the substrate. In the last stage (seedling anchorage), roots attach the seedlings to the substrate by orienting them towards the direction of light to maximise photosynthesis. The adaptations observed in P. oceanica are similar to those in other seagrasses with non-dormant seeds and fruits with membranous pericarps, such as Thalassia sp. and Enhalus sp. These common strategies suggest a convergent evolution in such seagrasses in terms of sexual recruitment. Understanding the sexual recruitment of habitat-forming species such as seagrasses is necessary to adequately manage the ecosystems that they inhabit.http://europepmc.org/articles/PMC6239318?pdf=render
collection DOAJ
language English
format Article
sources DOAJ
author Laura Guerrero-Meseguer
Carlos Sanz-Lázaro
Arnaldo Marín
spellingShingle Laura Guerrero-Meseguer
Carlos Sanz-Lázaro
Arnaldo Marín
Understanding the sexual recruitment of one of the oldest and largest organisms on Earth, the seagrass Posidonia oceanica.
PLoS ONE
author_facet Laura Guerrero-Meseguer
Carlos Sanz-Lázaro
Arnaldo Marín
author_sort Laura Guerrero-Meseguer
title Understanding the sexual recruitment of one of the oldest and largest organisms on Earth, the seagrass Posidonia oceanica.
title_short Understanding the sexual recruitment of one of the oldest and largest organisms on Earth, the seagrass Posidonia oceanica.
title_full Understanding the sexual recruitment of one of the oldest and largest organisms on Earth, the seagrass Posidonia oceanica.
title_fullStr Understanding the sexual recruitment of one of the oldest and largest organisms on Earth, the seagrass Posidonia oceanica.
title_full_unstemmed Understanding the sexual recruitment of one of the oldest and largest organisms on Earth, the seagrass Posidonia oceanica.
title_sort understanding the sexual recruitment of one of the oldest and largest organisms on earth, the seagrass posidonia oceanica.
publisher Public Library of Science (PLoS)
series PLoS ONE
issn 1932-6203
publishDate 2018-01-01
description The seagrass Posidonia oceanica is considered one of the oldest and largest living organisms on Earth. Notwithstanding, given the difficulty of monitoring its fruits and seeds in the field, the development of P. oceanica during its sexual recruitment is not completely understood. We studied the stages of development of P. oceanica seeds from their dispersion in the fruit interior to their settlement in sediment through histological, ultrastructural and mesocosm experiments. P. oceanica sexual recruitment can be divided into three main stages that focus on maximising photosynthesis and anchoring the seedlings to the sediment. In the first stage (fruit dispersion), seeds perform photosynthesis while being transported inside the fruit along the sea surface. In the second stage (seed adhesion), seeds develop adhesive microscopic hairs that cover the primary and secondary roots and favour seed adhesion to the substrate. In the last stage (seedling anchorage), roots attach the seedlings to the substrate by orienting them towards the direction of light to maximise photosynthesis. The adaptations observed in P. oceanica are similar to those in other seagrasses with non-dormant seeds and fruits with membranous pericarps, such as Thalassia sp. and Enhalus sp. These common strategies suggest a convergent evolution in such seagrasses in terms of sexual recruitment. Understanding the sexual recruitment of habitat-forming species such as seagrasses is necessary to adequately manage the ecosystems that they inhabit.
url http://europepmc.org/articles/PMC6239318?pdf=render
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