Foliose species of New Zealand red algae: diversity in the genus Tsengia (Tsengiaceae, Halymeniales), including T. northlandica sp. nov.

Phycologia ◽  
2020 ◽  
Vol 59 (5) ◽  
pp. 437-448
Author(s):  
Roberta D'Archino ◽  
Giuseppe C. Zuccarello
Keyword(s):  
New Zealand ◽  
Red Algae

scholarly journals Costatone C—A new halogenated monoterpene from the New Zealand red alga plocamium angustum

2020 ◽  
Author(s):  
Joe Bracegirdle ◽  
Z Sohail ◽  
Michael Fairhurst ◽  
Monica Gerth ◽  
Giuseppe Zuccarello ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Antibacterial Activity ◽  
New Zealand ◽  
Natural Product ◽  
Absolute Configuration ◽  
Red Algae ◽  
Red Alga ◽  
Product Distributions ◽  
Halogenated Monoterpenes ◽  
The Absolute

© 2019 by the authors Red algae of the genus Plocamium have been a rich source of halogenated monoterpenes. Herein, a new cyclic monoterpene, costatone C (7), was isolated from the extract of P. angustum collected in New Zealand, along with the previously reported (1E,5Z)-1,6-dichloro-2-methylhepta-1,5-dien-3-ol (8). Elucidation of the planar structure of 7 was achieved through conventional NMR and (−)-HR-APCI-MS techniques, and the absolute configuration by comparison of experimental and DFT-calculated ECD spectra. The absolute configuration of 8 was determined using Mosher’s method. Compound 7 showed mild antibacterial activity against Staphylococcus aureus and S. epidermidis. The state of Plocamium taxonomy and its implications upon natural product distributions, especially across samples from specimens collected in different countries, is also discussed.

scholarly journals Costatone C—A New Halogenated Monoterpene from the New Zealand Red Alga Plocamium angustum

Marine Drugs ◽  
2019 ◽  
Vol 17 (7) ◽  
pp. 418 ◽  
Author(s):  
Joe Bracegirdle ◽  
Zaineb Sohail ◽  
Michael J. Fairhurst ◽  
Monica L. Gerth ◽  
Giuseppe C. Zuccarello ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Antibacterial Activity ◽  
New Zealand ◽  
Natural Product ◽  
Absolute Configuration ◽  
Red Algae ◽  
Red Alga ◽  
Product Distributions ◽  
Halogenated Monoterpenes ◽  
The Absolute

Red algae of the genus Plocamium have been a rich source of halogenated monoterpenes. Herein, a new cyclic monoterpene, costatone C (7), was isolated from the extract of P. angustum collected in New Zealand, along with the previously reported (1E,5Z)-1,6-dichloro-2-methylhepta-1,5-dien-3-ol (8). Elucidation of the planar structure of 7 was achieved through conventional NMR and (−)-HR-APCI-MS techniques, and the absolute configuration by comparison of experimental and DFT-calculated ECD spectra. The absolute configuration of 8 was determined using Mosher’s method. Compound 7 showed mild antibacterial activity against Staphylococcus aureus and S. epidermidis. The state of Plocamium taxonomy and its implications upon natural product distributions, especially across samples from specimens collected in different countries, is also discussed.

scholarly journals Isolation and Structure Elucidation of New Secondary Metabolites from New Zealand Marine Red Algae

2021 ◽  
Author(s):  
◽  
Wendy Lynne Popplewell
Keyword(s):  
Antibacterial Activity ◽  
Natural Products ◽  
New Zealand ◽  
Secondary Metabolites ◽  
Natural Product ◽  
Red Algae ◽  
Structure Elucidation ◽  
Screening Tool ◽  
Product Analysis ◽  
Algal Extracts

<p>The natural product analysis of New Zealand red algae has been neglected in recent years, and there is obvious scope for the chemical re-evaluation of New Zealand marine red algae. This study describes the isolation and structure elucidation of 12 new and eight known compounds from four different genera of red algae. To aid in this process, 34 red algae were screened in order to generate a digital HSQC spectra mask, a screening tool developed by the VUW Marine Natural Products group to identify extracts of interest for further analysis. All 34 algal extracts were screened using the HSQC mask and four extracts were identified as interesting and analysed in detail. Examination of extracts of the red algae Plocamium costatum and Ballia callitricha lead to the isolation of three known metabolites. Eleven new oxylipins, labillarides A to K, are reported from the alga Phacelocarpus labillardieri. Labillarides A to H are polyunsaturated alpha-pyrone macrocycles, all of which show similarities to the previously reported compounds isolated from southern Australian collections of the algae. Labillarides E to H are of particular interest as they represent the two diastereomeric pairs associated with variation at the C-3 and C-8 chiral centres. Labillarides I and J are related enol macrocycles while labillaride K is a furan-3-one oxylipin, all of which have biogenic significance to the macrocyclic alpha-pyrones. Labillarides A, B and I exhibit moderate cytotoxicity while labillaride C shows moderate antibacterial activity. A new nitrogenous bromophenol, colensolide A, was isolated from the alga Osmundaria colensoi along with five known bromophenols. The presence of nitrogen-containing sidechains in bromophenols is unusual but not unprecedented. The bicyclic nitrogenous moiety observed in colensolide A is proposed to be of histidine origin. Several of the known bromophenols exhibit antibacterial activity and one shows moderate cytotoxicity.</p>

scholarly journals Isolation and Structure Elucidation of New Secondary Metabolites from New Zealand Marine Red Algae

2021 ◽  
Author(s):  
◽  
Wendy Lynne Popplewell
Keyword(s):  
Antibacterial Activity ◽  
Natural Products ◽  
New Zealand ◽  
Secondary Metabolites ◽  
Natural Product ◽  
Red Algae ◽  
Structure Elucidation ◽  
Screening Tool ◽  
Product Analysis ◽  
Algal Extracts

<p>The natural product analysis of New Zealand red algae has been neglected in recent years, and there is obvious scope for the chemical re-evaluation of New Zealand marine red algae. This study describes the isolation and structure elucidation of 12 new and eight known compounds from four different genera of red algae. To aid in this process, 34 red algae were screened in order to generate a digital HSQC spectra mask, a screening tool developed by the VUW Marine Natural Products group to identify extracts of interest for further analysis. All 34 algal extracts were screened using the HSQC mask and four extracts were identified as interesting and analysed in detail. Examination of extracts of the red algae Plocamium costatum and Ballia callitricha lead to the isolation of three known metabolites. Eleven new oxylipins, labillarides A to K, are reported from the alga Phacelocarpus labillardieri. Labillarides A to H are polyunsaturated alpha-pyrone macrocycles, all of which show similarities to the previously reported compounds isolated from southern Australian collections of the algae. Labillarides E to H are of particular interest as they represent the two diastereomeric pairs associated with variation at the C-3 and C-8 chiral centres. Labillarides I and J are related enol macrocycles while labillaride K is a furan-3-one oxylipin, all of which have biogenic significance to the macrocyclic alpha-pyrones. Labillarides A, B and I exhibit moderate cytotoxicity while labillaride C shows moderate antibacterial activity. A new nitrogenous bromophenol, colensolide A, was isolated from the alga Osmundaria colensoi along with five known bromophenols. The presence of nitrogen-containing sidechains in bromophenols is unusual but not unprecedented. The bicyclic nitrogenous moiety observed in colensolide A is proposed to be of histidine origin. Several of the known bromophenols exhibit antibacterial activity and one shows moderate cytotoxicity.</p>

The Red Algae Genus Callophyllis Kützing (Kallymeniaceae, Gigartinales) from Eastern Mainland Australia, with Notes on the Genus Ectophora J. Agardh

1993 ◽  
Vol 6 (4) ◽  
pp. 321 ◽  
Author(s):  
AJK Millar
Keyword(s):  
New Zealand ◽  
Cross Section ◽  
Red Algae ◽  
Type Species ◽  
New South ◽  
New South Wales ◽  
Outer Cortex ◽  
Supporting Cells ◽  
South Wales ◽  
Carpogonial Branch

Two species attributable to Callophyllis, a genus only recently recorded from eastern mainland Australia, are described from subtidal habitats in New South Wales. One of the species closely conforms to the New Zealand endemic Callophyllis ilepressa (J. Agardh) Laing, formerly the type species of the genus Ectophora J. Agardh. Although full reproductive details of this species are lacking, evidence in this survey strongly suggests that the genus was and is correctly placed in synonymy with Callophyllis. Thalli of C. depressa consist of prostrale, spreading, imbricate blades firmly anchored to rocky substrata by numerous haptera arising from the under surfaces. Upper frond surfaces are iridescent in localised patches corresponding to nests of refractive subcortical cells. The outer cortex in cross section comprises three to six layers and is composed of anticlinal filaments lacking secondary pit connections. The medulla consists of large, subisodiametric cells interspersed with narrow filaments. Plants appear to be procarpic, the supporting cells bearing a single three-celled carpogonial branch and several elaborately lobed, elongated, sterile cells. The second species is named Callophyllis nana sp. nov. for its diminutive (1.5 to 3 cm in length) fronds. Blades overlap, anastornose, and attach to rocky or bryozoan substrata by a single basal holdfast. The cortex is single-layered, the medulla being one to several layers of large subisodiametric cells interspersed with narrow filaments. Plants appear to be procarpic, the supporting cells bearing a single three-celled carpogonial branch and several relatively unlobed, short, bulbous sterile cells. Because of the inclusion of Ectophora into Callophyllis, the new name Callophyllis laingiaiia is proposed to replace Callophyllis dichotoma (J. Agardh) Laing [non C. dichotoma (Hooker et Harvey in Hooker) Kützing].

scholarly journals Physiological responses to salt stress by native and introduced red algae in New Zealand

ALGAE ◽  
2021 ◽  
Vol 36 (2) ◽  
pp. 137-146
Author(s):  
Vanessa Gambichler ◽  
Giuseppe C. Zuccarello ◽  
Ulf Karsten
Keyword(s):  
Salt Stress ◽  
New Zealand ◽  
Red Algae ◽  
Physiological Responses
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