Sand supplementation favors tropical seagrass Thalassia hemprichii in eutrophic bay: implications for seagrass restoration and management.

Jiang, Z; Liu, S; Cui, L; He, J; Fang, Y; Premarathne, C; Li, L; Wu, Y; Huang, X; Kumar, M

Sand supplementation favors tropical seagrass Thalassia hemprichii in eutrophic bay: implications for seagrass restoration and management.

Jiang, Z Liu, S Cui, L He, J Fang, Y Premarathne, C Li, L Wu, Y Huang, X Kumar, M

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Publisher:: Springer Nature
Publication Type:: Journal Article
Citation:: BMC Plant Biol, 2022, 22, (1), pp. 296
Issue Date:: 2022-06-16

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Field	Value	Language
dc.contributor.author	Jiang, Z
dc.contributor.author	Liu, S
dc.contributor.author	Cui, L
dc.contributor.author	He, J
dc.contributor.author	Fang, Y
dc.contributor.author	Premarathne, C
dc.contributor.author	Li, L
dc.contributor.author	Wu, Y
dc.contributor.author	Huang, X
dc.contributor.author	Kumar, M https://orcid.org/0000-0002-5247-3059
dc.date.accessioned	2023-07-09T02:11:55Z
dc.date.available	2022-05-11
dc.date.available	2023-07-09T02:11:55Z
dc.date.issued	2022-06-16
dc.identifier.citation	BMC Plant Biol, 2022, 22, (1), pp. 296
dc.identifier.issn	1471-2229
dc.identifier.issn	1471-2229
dc.identifier.uri	http://hdl.handle.net/10453/171358
dc.description.abstract	BACKGROUND: Sediment is crucial for the unique marine angiosperm seagrass growth and successful restoration. Sediment modification induced by eutrophication also exacerbates seagrass decline and reduces plantation and transplantation survival rates. However, we lack information regarding the influence of sediment on seagrass photosynthesis and the metabolics, especially regarding the key secondary metabolic flavone. Meanwhile, sulfation of flavonoids in seagrass may mitigate sulfide intrusion, but limited evidence is available. RESULTS: We cultured the seagrass Thalassia hemprichii under controlled laboratory conditions in three sediment types by combining different ratios of in-situ eutrophic sediment and coarse beach sand. We examined the effects of beach sand mixed with natural eutrophic sediments on seagrass using photobiology, metabolomics and isotope labelling approaches. Seagrasses grown in eutrophic sediments mixed with beach sand exhibited significantly higher photosynthetic activity, with a larger relative maximum electron transport rate and minimum saturating irradiance. Simultaneously, considerably greater belowground amino acid and flavonoid concentrations were observed to counteract anoxic stress in eutrophic sediments without mixed beach sand. This led to more positive belowground stable sulfur isotope ratios in eutrophic sediments with a lower Eh. CONCLUSIONS: These results indicated that coarse beach sand indirectly enhanced photosynthesis in T. hemprichii by reducing sulfide intrusion with lower amino acid and flavonoid concentrations. This could explain why T. hemprichii often grows better on coarse sand substrates. Therefore, it is imperative to consider adding beach sand to sediments to improve the environmental conditions for seagrass and restore seagrass in eutrophic ecosystems.
dc.format	Electronic
dc.language	eng
dc.publisher	Springer Nature
dc.relation.ispartof	BMC Plant Biol
dc.relation.isbasedon	10.1186/s12870-022-03647-0
dc.rights	info:eu-repo/semantics/openAccess
dc.subject	0605 Microbiology, 0607 Plant Biology, 0703 Crop and Pasture Production
dc.subject.classification	Plant Biology & Botany
dc.subject.classification	3004 Crop and pasture production
dc.subject.classification	3108 Plant biology
dc.subject.mesh	Amino Acids
dc.subject.mesh	Bays
dc.subject.mesh	Dietary Supplements
dc.subject.mesh	Ecosystem
dc.subject.mesh	Flavonoids
dc.subject.mesh	Hydrocharitaceae
dc.subject.mesh	Sand
dc.subject.mesh	Sulfides
dc.subject.mesh	Hydrocharitaceae
dc.subject.mesh	Sulfides
dc.subject.mesh	Flavonoids
dc.subject.mesh	Amino Acids
dc.subject.mesh	Ecosystem
dc.subject.mesh	Dietary Supplements
dc.subject.mesh	Bays
dc.subject.mesh	Sand
dc.subject.mesh	Amino Acids
dc.subject.mesh	Bays
dc.subject.mesh	Dietary Supplements
dc.subject.mesh	Ecosystem
dc.subject.mesh	Flavonoids
dc.subject.mesh	Hydrocharitaceae
dc.subject.mesh	Sand
dc.subject.mesh	Sulfides
dc.title	Sand supplementation favors tropical seagrass Thalassia hemprichii in eutrophic bay: implications for seagrass restoration and management.
dc.type	Journal Article
utslib.citation.volume	22
utslib.location.activity	England
utslib.for	0605 Microbiology
utslib.for	0607 Plant Biology
utslib.for	0703 Crop and Pasture Production
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Strength - C3 - Climate Change Cluster
utslib.copyright.status	open_access	*
dc.date.updated	2023-07-09T02:11:51Z
pubs.issue	1
pubs.publication-status	Published online
pubs.volume	22
utslib.citation.issue	1

Abstract:

BACKGROUND: Sediment is crucial for the unique marine angiosperm seagrass growth and successful restoration. Sediment modification induced by eutrophication also exacerbates seagrass decline and reduces plantation and transplantation survival rates. However, we lack information regarding the influence of sediment on seagrass photosynthesis and the metabolics, especially regarding the key secondary metabolic flavone. Meanwhile, sulfation of flavonoids in seagrass may mitigate sulfide intrusion, but limited evidence is available. RESULTS: We cultured the seagrass Thalassia hemprichii under controlled laboratory conditions in three sediment types by combining different ratios of in-situ eutrophic sediment and coarse beach sand. We examined the effects of beach sand mixed with natural eutrophic sediments on seagrass using photobiology, metabolomics and isotope labelling approaches. Seagrasses grown in eutrophic sediments mixed with beach sand exhibited significantly higher photosynthetic activity, with a larger relative maximum electron transport rate and minimum saturating irradiance. Simultaneously, considerably greater belowground amino acid and flavonoid concentrations were observed to counteract anoxic stress in eutrophic sediments without mixed beach sand. This led to more positive belowground stable sulfur isotope ratios in eutrophic sediments with a lower Eh. CONCLUSIONS: These results indicated that coarse beach sand indirectly enhanced photosynthesis in T. hemprichii by reducing sulfide intrusion with lower amino acid and flavonoid concentrations. This could explain why T. hemprichii often grows better on coarse sand substrates. Therefore, it is imperative to consider adding beach sand to sediments to improve the environmental conditions for seagrass and restore seagrass in eutrophic ecosystems.

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http://hdl.handle.net/10453/171358