Status of Mangrove Ecosystem

Sundararaman, M.N.; Boopathi, T.; Gopinath, Selvaraj

doi:10.1007/978-1-4020-6112-7_11

Cited by 5 publications

(3 citation statements)

References 41 publications

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“…Similar observations have been reported from mangroves in India (Sakthivel & Kathiresan 2013). Members of the genus Lyngbya, together with Oscillatoria, Phormidium and Microcoleus, are widespread in mangrove areas (Sundararaman et al 2007). Lyngbya aestuarii was previously recorded as a dominant mat-forming cyanobacteria in hypersaline Laguna Guerrero Negro, Mexico (Bagmi et al 2007).…”

Section: Previous Records Of the Morphospecies Encounteredsupporting

confidence: 79%

“…Chroococcus minutus in this study was epiphytic on rotting tree branches from Balik Pulau and on a pneumatophore in Gurney, while X. schousboei was recorded from rotting tree branches in both areas. Submerged parts of mangrove trees, branches and pneumatophores potentially serve as habitat for epifloral and faunal communities (Sundararaman et al 2007;Mohamed & Al-Shehri 2015). However, previous records of both C. minutus and X. schousboei are from sediment (Hussain & Khoja 1993;Branco et al 2003;Sakthivel & Kathiresan 2013;Mohamed & Al-Shehri 2015).…”

Section: Previous Records Of the Morphospecies Encounteredmentioning

confidence: 99%

“…Mangroves are marine coastal ecosystems that constitute a transitional forest between the coast and the mainland. Mangroves are highly productive ecosystems and create unique niches for a diversity of plants and animals as well as providing nursery grounds for many benthic and pelagic marine organisms (Yabuki 2004;Alongi 2005;Sundararaman et al 2007;Rigonato et al 2013). Malaysia is one of six countries (the others being Indonesia, Australia, Brazil, Mexico and Nigeria) which together host 50.5% of the world's mangroves (Alvarenga et al 2015).…”

Section: Introductionmentioning

confidence: 99%

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Unveiling the Diversity of Periphytic Cyanobacteria (Cyanophyceae) from Tropical Mangroves in Penang, Malaysia

Nur Afiqah Abdul Rahim,

Faradina Merican Mohd Sidik Merican,

Ranina Radzi

et al. 2023

tlsr

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Cyanobacteria are one of the most important groups of photoautotrophic organisms, contributing to carbon and nitrogen fixation in mangroves worldwide. They also play an important role in soil retention and stabilisation and contribute to high plant productivity through their secretion of plant growth-promoting substances. However, their diversity and distribution in Malaysian mangrove ecosystems have yet to be studied in detail, despite Malaysia hosting a significant element of remaining mangroves globally. In a floristic survey conducted in Penang, peninsular Malaysia, 33 morphospecies of periphytic cyanobacteria were identified and described for the first time from a mangrove ecosystem in Malaysia. Sixteen genera, comprising Aphanocapsa, Chroococcus, Chroococcidiopsis, Cyanobacterium, Desmonostoc, Geitlerinema, Leptolyngbya, Lyngbya, Microcystis, Myxosarcina, Oscillatoria, Phormidium, Pseudanabaena, Spirulina, Trichocoleus and Xenococcus, were obtained from field material growing on diverse natural and artificial substrata. Oscillatoriales was the dominant order with Phormidium the dominant genus at nine of the 15 sampling sites examined. Three of the morphospecies, Aphanocapsa cf. concharum, Xenococcus cf. pallidus and Oscillatoria pseudocurviceps, are rare and poorly known morphospecies worldwide. Chroococcus minutus, Phormidium uncinatum, P. amphigranulata, and some species of Oscillatoriales are considered as pollution indicator species. This study provides important baseline information for further investigation of the cyanobacterial microflora present in other mangrove areas around Malaysia. A complete checklist will enhance understanding of their ecological role and the potential for benefits arising from useful secondary metabolites or threats via toxin production to the ecosystem.

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Section: Previous Records Of the Morphospecies Encounteredsupporting

confidence: 79%

Section: Previous Records Of the Morphospecies Encounteredmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Unveiling the Diversity of Periphytic Cyanobacteria (Cyanophyceae) from Tropical Mangroves in Penang, Malaysia

Nur Afiqah Abdul Rahim,

Faradina Merican Mohd Sidik Merican,

Ranina Radzi

et al. 2023

tlsr

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A new initiative in micropropagation: airborne bacterial volatiles modulate organogenesis and antioxidant activity in tobacco (Nicotiana tabacum L.) callus

Gopinath

Kumaran

Sundararaman

2015

In Vitro Cell.Dev.Biol.-Plant

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Characterization and Antimicrobial Properties of Silver and Silver Oxide Nanoparticles Synthesized by Cell-Free Extract of a Mangrove-Associated Pseudomonas aeruginosa M6 Using Two Different Thermal Treatments

Boopathi

Gopinath

Boopathi

et al. 2012

Ind. Eng. Chem. Res.

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Synthesis of silver nanoparticles by cell-free extract (CFE) of Pseudomonas aeruginosa M6 isolated from a mangrove ecosystem was demonstrated using two physical methods, namely, boiling (conventional thermal treatment (CTT)) and microwave treatment (MWT) at pH 9. X-ray diffraction (XRD) analysis revealed the presence of smaller (10.4 nm), pure silver nanoparticles synthesized via CTT (C-NPs) and larger silver oxide nanoparticles in majority with negligible concentration of pure silver particles by MWT. Transmission electron microscopy (TEM) analysis showed that C-NPs are spherical in shape. Atomic force microscopy (AFM) analysis also confirmed the presence of large-sized, aggregated nanoparticles synthesized via MWT (M-NPs). Electrophoresis indicated the size and charge-based mobility in agarose gel (0.4%), wherein the C-NPs moved faster than M-NPs, because of their relatively smaller size. The zeta potential value of C-NPs and M-NPs was found to be −30.1 mV and −23.1 mV, respectively. Fourier transform infrared (FT-IR) results revealed that both C-NPs and M-NPs were capped with proteins, but with different conformations. Furthermore, TEM analysis of bacterial cells exposed to aqueous silver nitrate showed the presence of spherical silver nanoparticles accumulated in periplasmic space, indicating the possible involvement of periplasmic nitrate reductase in this process. In addition, both C-NPs and M-NPs have also shown good antibacterial and anticandidal activities. Thus, marine Pseudomonas aeruginosa M6 can be a potential source for the synthesis of silver nanoparticles.

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Status of Mangrove Ecosystem

Cited by 5 publications

References 41 publications

Unveiling the Diversity of Periphytic Cyanobacteria (Cyanophyceae) from Tropical Mangroves in Penang, Malaysia

Unveiling the Diversity of Periphytic Cyanobacteria (Cyanophyceae) from Tropical Mangroves in Penang, Malaysia

A new initiative in micropropagation: airborne bacterial volatiles modulate organogenesis and antioxidant activity in tobacco (Nicotiana tabacum L.) callus

Characterization and Antimicrobial Properties of Silver and Silver Oxide Nanoparticles Synthesized by Cell-Free Extract of a Mangrove-Associated Pseudomonas aeruginosa M6 Using Two Different Thermal Treatments

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