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Authors de Arruda, ECP; Lima, GD; Farias, RD
Author Full Name de Arruda, Emilia Cristina Pereira; Lima, Gustavo da Costa; Farias, Rafael de Paiva
Title Leaf anatomical traits and their ecological significance for Acrostichum aureum (Pteridaceae), a remarkable fern species growing in mangroves
Source AQUATIC BOTANY
Language English
Document Type Article
Author Keywords Ecological convergence; Epidermis; Hypodermis; Mangrove fern; Sclerenchyma fibers
Keywords Plus TOLERANCE; EVOLUTION; LEAVES; BLUE
Abstract Mangroves are naturally stressful habitats, with high salinity, regular flooding, strong winds, high temperatures, and muddy, hypoxic soils, requiring adaptations in plant anatomy. In this sense, we present a description of the leaf anatomy of Acrostichum aureum, a remarkable fern species growing in mangroves, focusing on novelties and the significance of the traits for adaptation to mangrove conditions. The leaves were amphistomatic with anomocytic stomata at the same level as the other epidemic cells, and there was a uniseriate hypodermis on both surfaces of the lamina. A dense spongy parenchyma was present in the lamina with limited number of intercellular spaces. We observed sclerenchyma fibers in the costae (3?5 layers) immediately below the epidermis and surrounding the vascular bundles, which were amphicrival (1) and bicollateral (4) in the costae, and collateral and bicollateral in the mesophyll (4?6). In the costae, the endodermis was uniseriate with Casparian strip. The pericycle was interrupted, uniseriate, with varied cell sizes, indicating activity. Idioblasts containing isolated calcium oxalate crystals with a prismatic shape occurred in the epidermis, hypodermis, and sclerenchyma. Some anatomical traits of A. aureum are similar to those reported to angiosperms in mangroves, such as the presence of a thick cuticle, amphistomaty, hypodermis, CaOx crystals, and intercellular spaces, indicative of ecological convergence. These traits are potentially involved in promoting resistance to water loss, enhanced photosynthesis, avoidance of photoinhibition, mechanical resistance, resistance to herbivory, homeostasis, and detoxification.
Author Address [de Arruda, Emilia Cristina Pereira; Lima, Gustavo da Costa] Univ Fed Pernambuco, Dept Bot, BR-50560901 Recife, PE, Brazil; [Farias, Rafael de Paiva] Univ Fed Acre, Multidisciplinary Ctr, BR-68895000 Cruzeiro Do Sul, Acre, Brazil
Reprint Address Farias, RD (corresponding author), Univ Fed Acre, Multidisciplinary Ctr, BR-68895000 Cruzeiro Do Sul, Acre, Brazil.
E-mail Address rafaelpfarias@hotmail.com
ResearcherID Number da Costa Lima, Gustavo/N-8828-2018
ORCID Number da Costa Lima, Gustavo/0000-0002-4281-1878
Publisher ELSEVIER
Publisher City AMSTERDAM
Publisher Address RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS
ISSN 0304-3770
29-Character Source Abbreviation AQUAT BOT
ISO Source Abbreviation Aquat. Bot.
Publication Date APR
Year Published 2021
Volume 171
Article Number 103379
Digital Object Identifier (DOI) 10.1016/j.aquabot.2021.103379
Page Count 5
Web of Science Category Plant Sciences; Marine & Freshwater Biology
Subject Category Plant Sciences; Marine & Freshwater Biology
Document Delivery Number RP0VX
Unique Article Identifier WOS:000641455800009
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