<i>Bruguiera</i> (<i>Rhizophoraceae</i>) in the Indo-West Pacific: a morphometric assessment of hybridization within single-flowered taxa

Duke, Norman C.; Ge, Xinyu

doi:10.3767/000651911x572968

Cited by 17 publications

(26 citation statements)

References 10 publications

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“…Delineating mangrove species from putative hybrids using morphological characters are always questionable. Putative hybrids were reported within the major genera of Rhizophora , Sonneratia and Lumnitzera and recently in Bruguiera (Tomlinson 1986 ; Duke and Ge 2011 ). In the present study, we assessed mangrove species using plastid coding loci viz.…”

Section: Introductionmentioning

confidence: 95%

Assessment of mangroves from Goa, west coast India using DNA barcode

Saddhe

Jamdade²,

Kumar

2016

SpringerPlus

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Mangroves are salt-tolerant forest ecosystems of tropical and subtropical intertidal regions. They are among most productive, diverse, biologically important ecosystem and inclined toward threatened system. Identification of mangrove species is of critical importance in conserving and utilizing biodiversity, which apparently hindered by a lack of taxonomic expertise. In recent years, DNA barcoding using plastid markers rbcL and matK has been suggested as an effective method to enrich traditional taxonomic expertise for rapid species identification and biodiversity inventories. In the present study, we performed assessment of available 14 mangrove species of Goa, west coast India based on core DNA barcode markers, rbcL and matK. PCR amplification success rate, intra- and inter-specific genetic distance variation and the correct identification percentage were taken into account to assess candidate barcode regions. PCR and sequence success rate were high in rbcL (97.7 %) and matK (95.5 %) region. The two candidate chloroplast barcoding regions (rbcL, matK) yielded barcode gaps. Our results clearly demonstrated that matK locus assigned highest correct identification rates (72.09 %) based on TaxonDNA Best Match criteria. The concatenated rbcL + matK loci were able to adequately discriminate all mangrove genera and species to some extent except those in Rhizophora, Sonneratia and Avicennia. Our study provides the first endorsement of the species resolution among mangroves using plastid genes with few exceptions. Our future work will be focused on evaluation of other barcode markers to delineate complete resolution of mangrove species and identification of putative hybrids.Electronic supplementary materialThe online version of this article (doi:10.1186/s40064-016-3191-4) contains supplementary material, which is available to authorized users.

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Section: Introductionmentioning

confidence: 95%

Assessment of mangroves from Goa, west coast India using DNA barcode

Saddhe

Jamdade²,

Kumar

2016

SpringerPlus

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“…It produces wood that is used for fuel and house construction, and produces several useful metabolites such as diterpenes and triterpenes ( Dahdouh-Guebas et al, 2000 ; Han et al, 2004 ; Nebula, Harisankar & Chandramohanakumar, 2013 ). This genus comprises six species, namely B. cylindrica , B. exaristata , B. gymnorhiza , B. hainesii , B. parviflora and B. sexangula as well as their hybrids such as B. x rhynchopetala and B. x dungarra ( Duke & Ge, 2011 ; Duke & Kudo, 2018 ). Among them, B. gymnorhiza is the most widespread mangrove plant, while B. hainesii is a critically endangered mangrove plant ( FAO, 2007 ; Duke & Ge, 2011 ).…”

Section: Introductionmentioning

confidence: 99%

“…This genus comprises six species, namely B. cylindrica , B. exaristata , B. gymnorhiza , B. hainesii , B. parviflora and B. sexangula as well as their hybrids such as B. x rhynchopetala and B. x dungarra ( Duke & Ge, 2011 ; Duke & Kudo, 2018 ). Among them, B. gymnorhiza is the most widespread mangrove plant, while B. hainesii is a critically endangered mangrove plant ( FAO, 2007 ; Duke & Ge, 2011 ). Most Bruguiera species are distributed in the Indo-West Pacific region, except B. exaristata that is mostly distributed in Northern Australia and Southern New Guinea ( FAO, 2007 ; Duke & Ge, 2011 ; Urashi et al, 2013 ).…”

Section: Introductionmentioning

confidence: 99%

Complete chloroplast genome sequences of five Bruguiera species (Rhizophoraceae): comparative analysis and phylogenetic relationships

Ruang-areerate

Kongkachana

Naktang

et al. 2021

PeerJ

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Bruguiera is a genus of true mangroves that are mostly distributed in the Indo-West Pacific region. However, the number of published whole chloroplast genome sequences of Bruguiera species are limited. Here, the complete chloroplast sequences of five Bruguiera species were sequenced and assembled using Illumina data. The chloroplast genomes of B. gymnorhiza, B. hainesii, B. cylindrica, B. parviflora and B. sexangula were assembled into 161,195, 164,295, 164,297, 163,228 and 164,170 bp, respectively. All chloroplast genomes contain 37 tRNA and eight rRNA genes, with either 84 or 85 protein-coding genes. A comparative analysis of these genomes revealed high similarity in gene structure, gene order and boundary position of the LSC, SSC and two IR regions. Interestingly, B. gymnorhiza lost a rpl32 gene in the SSC region. In addition, a ndhF gene in B. parviflora straddles both the SSC and IRB boundary regions. These genes reveal differences in chloroplast evolution among Bruguiera species. Repeats and SSRs in the chloroplast genome sequences were found to be highly conserved between B. cylindrica and B. hainesii as well as B. gymnorhiza and B. sexangula indicating close genetic relationships based on maternal inheritance. Notably, B. hainesii, which is considered a hybrid between B. gymnorhiza and B. cylindrica, appears to have inherited the chloroplast from B. cylindrica. Investigating the effects of selection events on shared protein-coding genes showed a positive selection in rps7 and rpl36 genes in all species compared to land-plant species. A phylogenetic analysis, based on 59 conserved chloroplast protein-coding genes, showed strong support that all Bruguiera species are in the clade Rhizophoraceae. This study provides valuable genetic information for the study of evolutionary relationships and population genetics in Bruguiera and other mangrove species.

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“…The other names seem to be applicable to hybrid taxa. Duke and Ge () described a hybrid taxon Bruguiera × rhynchopetala that shows several intermediate characters of its putative parents: B. gymnorhiza and B. sexangula . Petal morphology, in particular, is important to distinguish between species and hybrid taxa in Bruguiera .…”

Section: Resultsmentioning

confidence: 99%

“…Several names lack original material, creating further problems for species identification. In one case, a taxon of Bruguiera was, at first, described as a new variety by Ko () but later it was rectified by Duke and Ge () and treated as a nothotaxon. The placement of a name of a nothotaxon under any one of the parental species as a synonym is erroneous.…”

Section: Introductionmentioning

confidence: 99%