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Publication Type J
Authors Gavin, NM; Durako, MJ
Author Full Name Gavin, Nathan M.; Durako, Michael J.
Title Localization and antioxidant capacity of flavonoids from intertidal and subtidal Halophila johnsonii and Halophila decipiens
Source AQUATIC BOTANY
Language English
Document Type Article
Author Keywords Antioxidant; Halophila; Flavonoid; Confocal microscopy
Keywords Plus PHENOLIC-COMPOUNDS; ULTRAVIOLET; STRESS; PLANTS; PHOTOBIOLOGY; RADIATION; RESPONSES; LEAVES; LIGHT
Abstract In this study, flavonoid localization, content and total antioxidant capacity in leaves of subtidal Halophila decipiens were compared to intertidal and subtidal Halophila johnsonii.H.johnsonii leaves had significantly higher flavonoid content (3.5 and 3.8 nmol quercetin equivalent mm(-2) leaf for intertidal and subtidal H. johnsonii, respectively) and antioxidant capacity (101.7 and 224.2 nmol Trolox equivalent mm(-2) leaf for intertidal and subtidal H. johnsonii, respectively) than H. decipiens leaves (1.4 nmol quercetin equivalent mm(-2) leaf and 21.0 nmol Trolox equivalent mm(-2) leaf). Flavonoid content did not significantly differ between intertidal and subtidal H. johnsonii, however, antioxidant capacity was significantly higher in subtidal plants. Confocal laser scanning microscopy of fresh leaf cross sections indicated that both species contained flavonoids in the cuticle, but only H. johnsonii contained intracellular flavonoids. Intracellular flavonoids are better situated to perform antioxidant functions in planta. These results suggest that flavonoid compounds in H. johnsonii are capable of sunscreen and antioxidant functions while an antioxidant role for flavonoids within H. decipiens is not supported. (C) 2011 Elsevier B.V. All rights reserved.
Author Address [Gavin, Nathan M.; Durako, Michael J.] Univ N Carolina, Dept Biol & Marine Biol, Ctr Marine Sci, Wilmington, NC 28409 USA
Reprint Address Durako, MJ (reprint author), Univ N Carolina, Dept Biol & Marine Biol, Ctr Marine Sci, 5600 Marvin Moss Ln, Wilmington, NC 28409 USA.
E-mail Address durakom@uncw.edu
ORCID Number Gavin, Nathan/0000-0003-3214-2575
Funding Agency and Grant Number NOAA National Marine Fisheries Service [GA133F08SE1688]; University of North Carolina Wilmington (UNCW)
Funding Text This research was supported by NOAA National Marine Fisheries Service (Award number GA133F08SE1688) and a University of North Carolina Wilmington (UNCW) Graduate School student summer research award (NMG). All plants were collected under the Florida Fish and Wildlife Conservation Commission (FFWCC) Special Activity License SAL-09-0972-SR. We give sincere thanks to Mark Gay for his guidance in the UNCW microscopy lab and Jennifer Kunzelman of FFWCC for help collecting field samples.
Cited Reference Count 31
Times Cited 8
Total Times Cited Count (WoS, BCI, and CSCD) 8
Publisher ELSEVIER SCIENCE BV
Publisher City AMSTERDAM
Publisher Address PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
ISSN 0304-3770
29-Character Source Abbreviation AQUAT BOT
ISO Source Abbreviation Aquat. Bot.
Publication Date OCT
Year Published 2011
Volume 95
Issue 3
Beginning Page 242
Ending Page 247
Digital Object Identifier (DOI) 10.1016/j.aquabot.2011.07.004
Page Count 6
Web of Science Category Plant Sciences; Marine & Freshwater Biology
Subject Category Plant Sciences; Marine & Freshwater Biology
Document Delivery Number 831VL
Unique Article Identifier WOS:000295759100011
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