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Park MR, Gauttam R, Fong B, Chen Y, Lim HG, Feist AM, Mukhopadhyay A, Petzold CJ, Simmons BA, Singer SW. Revealing oxidative pentose metabolism in new Pseudomonas putida isolates. Environ Microbiol 2023; 25:493-504. [PMID: 36465038 PMCID: PMC10107873 DOI: 10.1111/1462-2920.16296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Accepted: 11/29/2022] [Indexed: 12/12/2022]
Abstract
The Pseudomonas putida group in the Gammaproteobacteria has been intensively studied for bioremediation and plant growth promotion. Members of this group have recently emerged as promising hosts to convert intermediates derived from plant biomass to biofuels and biochemicals. However, most strains of P. putida cannot metabolize pentose sugars derived from hemicellulose. Here, we describe three isolates that provide a broader view of the pentose sugar catabolism in the P. putida group. One of these isolates clusters with the well-characterized P. alloputida KT2440 (Strain BP6); the second isolate clustered with plant growth-promoting strain P. putida W619 (Strain M2), while the third isolate represents a new species in the group (Strain BP8). Each of these isolates possessed homologous genes for oxidative xylose catabolism (xylDXA) and a potential xylonate transporter. Strain M2 grew on arabinose and had genes for oxidative arabinose catabolism (araDXA). A CRISPR interference (CRISPRi) system was developed for strain M2 and identified conditionally essential genes for xylose growth. A glucose dehydrogenase was found to be responsible for initial oxidation of xylose and arabinose in strain M2. These isolates have illuminated inherent diversity in pentose catabolism in the P. putida group and may provide alternative hosts for biomass conversion.
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Affiliation(s)
- Mee-Rye Park
- Joint BioEnergy Institute, Emeryville, California, USA
- Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Rahul Gauttam
- Joint BioEnergy Institute, Emeryville, California, USA
- Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Bonnie Fong
- Joint BioEnergy Institute, Emeryville, California, USA
- Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Yan Chen
- Joint BioEnergy Institute, Emeryville, California, USA
- Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Hyun Gyu Lim
- Joint BioEnergy Institute, Emeryville, California, USA
- Department of Bioengineering, University of California San Diego, La Jolla, California, USA
| | - Adam M Feist
- Joint BioEnergy Institute, Emeryville, California, USA
- Department of Bioengineering, University of California San Diego, La Jolla, California, USA
| | - Aindrila Mukhopadhyay
- Joint BioEnergy Institute, Emeryville, California, USA
- Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Christopher J Petzold
- Joint BioEnergy Institute, Emeryville, California, USA
- Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Blake A Simmons
- Joint BioEnergy Institute, Emeryville, California, USA
- Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, California, USA
| | - Steven W Singer
- Joint BioEnergy Institute, Emeryville, California, USA
- Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, California, USA
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Coleman MA, Reddy M, Nimbs MJ, Marshell A, Al-Ghassani SA, Bolton JJ, Jupp BP, De Clerck O, Leliaert F, Champion C, Pearson GA, Serrão EA, Madeira P, Wernberg T. Loss of a globally unique kelp forest from Oman. Sci Rep 2022; 12:5020. [PMID: 35322059 PMCID: PMC8943203 DOI: 10.1038/s41598-022-08264-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Accepted: 03/04/2022] [Indexed: 11/08/2022] Open
Abstract
Kelp forests are declining in many regions globally with climatic perturbations causing shifts to alternate communities and significant ecological and economic loss. Range edge populations are often at most risk and are often only sustained through localised areas of upwelling or on deeper reefs. Here we document the loss of kelp forests (Ecklonia radiata) from the Sultanate of Oman, the only confirmed northern hemisphere population of this species. Contemporary surveys failed to find any kelp in its only known historical northern hemisphere location, Sadah on the Dhofar coast. Genetic analyses of historical herbarium specimens from Oman confirmed the species to be E. radiata and revealed the lost population contained a common CO1 haplotype found across South Africa, Australia and New Zealand suggesting it once established through rapid colonisation throughout its range. However, the Omani population also contained a haplotype that is found nowhere else in the extant southern hemisphere distribution of E. radiata. The loss of the Oman population could be due to significant increases in the Arabian Sea temperature over the past 40 years punctuated by suppression of coastal upwelling. Climate-mediated warming is threatening the persistence of temperate species and precipitating loss of unique genetic diversity at lower latitudes.
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Affiliation(s)
- M A Coleman
- National Marine Science Centre, New South Wales Fisheries, 2 Bay Drive, Coffs Harbour, NSW, 2450, Australia.
- National Marine Science Centre, Southern Cross University, 2 Bay Drive, Coffs Harbour, NSW, 2450, Australia.
- UWA Oceans Institute and School of Biological Sciences, University of Western Australia, 35 Stirling Highway, Crawley, WA, 6009, Australia.
| | - M Reddy
- Department of Biological Sciences, University of Cape Town, Private Bag X3, Cape Town, 7701, South Africa
| | - M J Nimbs
- National Marine Science Centre, New South Wales Fisheries, 2 Bay Drive, Coffs Harbour, NSW, 2450, Australia
- National Marine Science Centre, Southern Cross University, 2 Bay Drive, Coffs Harbour, NSW, 2450, Australia
| | - A Marshell
- Department of Marine Science and Fisheries, College of Agricultural and Marine Sciences, Sultan Qaboos University, Muscat, Oman
- Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, Australia
| | - S A Al-Ghassani
- Fisheries Research Centre - Dhofar, Directorate General of Fisheries Research, Ministry of Agriculture, Fisheries and Water Resource, Salalah, Sultanate of Oman
| | - J J Bolton
- Department of Biological Sciences, University of Cape Town, Private Bag X3, Cape Town, 7701, South Africa
| | - B P Jupp
- Senior Consultant - Marine, P.O. Box 389, Puerto Princesa, Palawan, 5300, Philippines
| | - O De Clerck
- Biology Department, Ghent University, Krijgslaan 281, Building S8, 9000, Ghent, Belgium
| | - F Leliaert
- Biology Department, Ghent University, Krijgslaan 281, Building S8, 9000, Ghent, Belgium
- Meise Botanic Garden, Nieuwelaan 38, 1860, Meise, Belgium
| | - C Champion
- National Marine Science Centre, New South Wales Fisheries, 2 Bay Drive, Coffs Harbour, NSW, 2450, Australia
- National Marine Science Centre, Southern Cross University, 2 Bay Drive, Coffs Harbour, NSW, 2450, Australia
| | - G A Pearson
- CCMAR, CIMAR, University of Algarve, Gambelas, 8005-139, Faro, Portugal
| | - E A Serrão
- CCMAR, CIMAR, University of Algarve, Gambelas, 8005-139, Faro, Portugal
| | - P Madeira
- CCMAR, CIMAR, University of Algarve, Gambelas, 8005-139, Faro, Portugal
| | - T Wernberg
- UWA Oceans Institute and School of Biological Sciences, University of Western Australia, 35 Stirling Highway, Crawley, WA, 6009, Australia
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Perez‐Correa J, Carr P, Meeuwig JJ, Koldewey HJ, Letessier TB. Climate oscillation and the invasion of alien species influence the oceanic distribution of seabirds. Ecol Evol 2020; 10:9339-9357. [PMID: 32953065 PMCID: PMC7487247 DOI: 10.1002/ece3.6621] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Revised: 06/30/2020] [Accepted: 07/09/2020] [Indexed: 12/29/2022] Open
Abstract
Spatial and temporal distribution of seabird transiting and foraging at sea is an important consideration for marine conservation planning. Using at-sea observations of seabirds (n = 317), collected during the breeding season from 2012 to 2016, we built boosted regression tree (BRT) models to identify relationships between numerically dominant seabird species (red-footed booby, brown noddy, white tern, and wedge-tailed shearwater), geomorphology, oceanographic variability, and climate oscillation in the Chagos Archipelago. We documented positive relationships between red-footed booby and wedge-tailed shearwater abundance with the strength in the Indian Ocean Dipole, as represented by the Dipole Mode Index (6.7% and 23.7% contribution, respectively). The abundance of red-footed boobies, brown noddies, and white terns declined abruptly with greater distance to island (17.6%, 34.1%, and 41.1% contribution, respectively). We further quantified the effects of proximity to rat-free and rat-invaded islands on seabird distribution at sea and identified breaking point distribution thresholds. We detected areas of increased abundance at sea and habitat use-age under a scenario where rats are eradicated from invaded nearby islands and recolonized by seabirds. Following rat eradication, abundance at sea of red-footed booby, brown noddy, and white terns increased by 14%, 17%, and 3%, respectively, with no important increase detected for shearwaters. Our results have implication for seabird conservation and island restoration. Climate oscillations may cause shifts in seabird distribution, possibly through changes in regional productivity and prey distribution. Invasive species eradications and subsequent island recolonization can lead to greater access for seabirds to areas at sea, due to increased foraging or transiting through, potentially leading to distribution gains and increased competition. Our approach predicting distribution after successful eradications enables anticipatory threat mitigation in these areas, minimizing competition between colonies and thereby maximizing the risk of success and the conservation impact of eradication programs.
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Affiliation(s)
- Julian Perez‐Correa
- Zoological Society of LondonInstitute of ZoologyLondonUK
- Escuela de Ciencias AmbientalesFacultad de IngenieríaUniversidad Espíritu SantoSamborondónEcuador
- Imperial College LondonLondonUK
| | - Peter Carr
- Zoological Society of LondonInstitute of ZoologyLondonUK
- Centre for Ecology and ConservationUniversity of ExeterCornwallUK
| | - Jessica J. Meeuwig
- Centre for Marine Futures, Oceans Institute and School of Animal BiologyThe University of Western AustraliaCrawleyWAAustralia
| | - Heather J. Koldewey
- Centre for Ecology and ConservationUniversity of ExeterCornwallUK
- Conservation and PolicyZoological Society of LondonLondonUK
| | - Tom B. Letessier
- Zoological Society of LondonInstitute of ZoologyLondonUK
- Centre for Marine Futures, Oceans Institute and School of Animal BiologyThe University of Western AustraliaCrawleyWAAustralia
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