Molecular indicators of chronic seagrass stress: A new era in the management of seagrass ecosystems?

Macreadie, Peter I.; Schliep, Martin; Rasheed, Michael A.; Chartrand, Kathryn M.; Ralph, Peter J.

doi:10.1016/j.ecolind.2013.11.017

Cited by 37 publications

(24 citation statements)

References 16 publications

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“…In the context of seagrass conservation, elucidating the genomic basis of Z. marina's complex adaptations to ocean waters (Extended Data Fig. 6) will also inform the development of molecular indicators of their physiological status 28 , as these unique ecosystems rank, unfortunately, among the most threatened on Earth 26,27 .…”

Section: Letter Researchmentioning

confidence: 99%

The genome of the seagrass Zostera marina reveals angiosperm adaptation to the sea

Olsen

Rouzé

Verhelst

et al. 2016

Nature

433

486

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Seagrasses colonized the sea 1 on at least three independent occasions to form the basis of one of the most productive and widespread coastal ecosystems on the planet 2 . Here we report the genome of Zostera marina (L.), the first, to our knowledge, marine angiosperm to be fully sequenced. This reveals unique insights into the genomic losses and gains involved in achieving the structural and physiological adaptations required for its marine lifestyle, arguably the most severe habitat shift ever accomplished by flowering plants. Key angiosperm innovations that were lost include the entire repertoire of stomatal genes 3 , genes involved in the synthesis of terpenoids and ethylene signalling, and genes for ultraviolet protection and phytochromes for far-red sensing. Seagrasses have also regained functions enabling them to adjust to full salinity. Their cell walls contain all of the polysaccharides typical of land plants, but also contain polyanionic, low-methylated pectins and sulfated galactans, a feature shared with the cell walls of all macroalgae 4 and that is important for ion homoeostasis, nutrient uptake and O 2 /CO 2 exchange through leaf epidermal cells. The Z. marina genome resource will markedly advance a wide range of functional ecological studies from adaptation of marine ecosystems under climate warming 5,6 , to unravelling the mechanisms of osmoregulation under high salinities that may further inform our understanding of the evolution of salt tolerance in crop plants 7

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Section: Letter Researchmentioning

confidence: 99%

The genome of the seagrass Zostera marina reveals angiosperm adaptation to the sea

Olsen

Rouzé

Verhelst

et al. 2016

Nature

433

486

View full text Add to dashboard Cite

show abstract

“…Omics tools promise earlier and more targeted detection of stress (Malandrakis et al, 2017a), as they have the potential to reveal how seagrasses respond to abiotic stress, and how tolerance is obtained (Exadactylos, 2015), which could contribute to seagrass management and conservation (Macreadie et al, 2014). Since the turn of the century, and the genome sequencing of the model plant Arabidopsis thaliana (The Arabidopsis Genome Initiative, 2000), these tools have helped gain a deeper understanding into the molecular function of plants.…”

Section: Introductionmentioning

confidence: 99%

Metabolomics and traditional indicators unveil stress of a seagrass (Cymodocea nodosa) meadow at intermediate distance from a fish farm

Kock

Hasler-Sheetal

Holmer

et al. 2020

Ecological Indicators

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Seasonal variation of structural, physiological and growth indicators and the metabolome of the seagrass Cymodocea nodosa, as well as biogeochemical conditions of underlying sediment were studied in two meadows growing at increasing distance downstream from a fish farm in the Aegean Sea in order to assess seagrass performance under stress. Horizontal rhizome production decreased significantly with proximity to the fish farm (0.67 and 1.57 g DW m-2 d-ACCEPTED MANUSCRIPT 1 close and far from the fish-farm, respectively). This coincided with observed effects on ecophyiological indicators, such as rhizome nitrogen, leaf carbon and leaf δ 13 C, which were elevated with proximity to the fish-farm. Seasonality was shown by some indicators being elevated in either in the warm (C of all tissues and leaf δ 34 S) or the cold period (N of all tissues). Growth promoting metabolites (sucrose, fructose, myo-inositol, heptacosane, tetracosane, stigmasterol, catechin and alpha-tocopherol) were lower close to the zone, whereas metabolites involved with stress-response (alanine, serine, proline, putrescine, ornithine, 3,4dihydroxybenzoic acid and cinnamic acid) were higher. We found that growth-promoting metabolites were positively correlated with horizontal rhizome production, whereas the metabolites related to stress were negatively correlated. Metabolomic fingerprinting of seagrass provides opportunities for early detection of environmental degradation in marine ecological studies.

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“…The monitoring of structural and functional descriptors of P. oceanica meadow health status (Buia et al 2004) provides important information about the vitality and dynamic of meadows (Pergent-Martini et al 2005), as well as the human influence on the environment (Montefalcone 2009). Recently, a new suite of descriptors has been proposed to assess the ecological status of P. oceanica meadows (Rotini et al 2013), taking into account the physiological features of the plants by means of biochemical (Arnold et al 2012) and genetic markers (Micheli et al 2005(Micheli et al , 2015Procaccini et al 2007;Macreadie et al 2014) as standard indicators.…”

Section: Introductionmentioning

confidence: 99%

Assessment of the ecological structure of Posidonia oceanica (L.) Delile on the northern coast of Lazio, Italy (central Tyrrhenian, Mediterranean)

Gnisci¹,

Martiis²,

Belmonte³

et al. 2020

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The ecological structure of Posidonia oceanica (L.) Delile meadows was evaluated on the northern coast of Lazio, Italy (central Tyrrhenian, Mediterranean sea). This is an infra-littoral zone with a wide range of anthropogenic activities and high geo-morphological variability, which reflects heterogeneity in shoot density, leaf morphology and biomass in fragmented patches. Genetic variability in populations corresponds to the formation of 3 sub-clusters, in the diverse impacted zones (north, centre and south), being correlated to the geographical distance between sites. AMOVA estimated a high genetic variation showing 43.05% individual differences within populations with a marked differentiation among the populations (56.9%) indicated by Fst value (0.57). These results revealed the role of the genetic structure of seagrasses for determining selectivity of fragmented habitat, in response to natural drivers. They showed that site-specific self-recruitment is related to biodiversity capacity and to the geo-morphological characteristic of the coast.

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Molecular indicators of chronic seagrass stress: A new era in the management of seagrass ecosystems?

Cited by 37 publications

References 16 publications

The genome of the seagrass Zostera marina reveals angiosperm adaptation to the sea

The genome of the seagrass Zostera marina reveals angiosperm adaptation to the sea

Metabolomics and traditional indicators unveil stress of a seagrass (Cymodocea nodosa) meadow at intermediate distance from a fish farm

Assessment of the ecological structure of Posidonia oceanica (L.) Delile on the northern coast of Lazio, Italy (central Tyrrhenian, Mediterranean)

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