Seagrasses excrete sugars to their rhizosphere making them the sweet spots in the sea (Plant roots; MALDI-MSI assay) (MTBLS1746)
DOI: 10.1038/s41559-022-01740-z
创建时间: 2025-01-05 12:14:17
Seagrasses are one of the most efficient natural sinks of carbon dioxide (CO2) on Earth. Despite covering less than 0.1% of coastal regions, they have the capacity to bury up to 10% of marine organic matter and can bury the same amount of carbon 35 times faster than tropical rainforests. On land, the soil’s ability to sequestrate carbon is intimately linked to microbial metabolism. Despite the growing attention to the link between plant production, microbial communities, and the carbon cycle in terrestrial ecosystems, these processes remain enigmatic in the sea. Here, we show that seagrasses excrete organic sugars, namely in the form of sucrose, into their rhizospheres. Surprisingly, the microbial communities living underneath meadows do not fully use this sugar stock in their metabolism. Instead, sucrose piles up in the sediments to mM concentrations underneath multiple types of seagrass meadows. Sediment incubation experiments show that microbial communities living underneath a meadow use sucrose at low metabolic rates. Our metagenomic analyses revealed that the distinct community of microorganisms occurring underneath meadows is limited in their ability to degrade simple sugars, which allows these compounds to persist in the environment over relatively long periods of time. Our findings reveal how seagrasses form blue carbon stocks despite the relatively small area they occupy. Unfortunately, anthropogenic disturbances are threatening the long-term persistence of seagrass meadows. Given that these sediments contain a large stock of sugars that heterotopic bacteria can degrade, it is even more important to protect these ecosystems from degradation.
人工注释组织解剖术语列表
blank, vascular bundle, root epidermis, xylem, pericycle, root endodermis, hair root, phloemCite as:
Sogin, E.M., Michellod, D., Gruber-Vodicka, H.R. et al. Sugars dominate the seagrass rhizosphere. Nat Ecol Evol 6, 866–877 (2022). https://doi.org/10.1038/s41559-022-01740-z
当前项目中的样本列表
20190613_MS1_A19r-18
创建时间: 2025-01-06 08:30:14
空间分辨率: 17μm,
246x264
扫描: MALDI (CHCA)
物种: Posidonia oceanica (root) - normal
Note
20190614_MS1_A19r-20
创建时间: 2025-01-05 12:14:17
空间分辨率: 17μm,
262x276
扫描: MALDI (CHCA)
物种: Posidonia oceanica (root) - normal
Note
Seagrasses are one of the most efficient natural sinks of carbon dioxide (CO2) on Earth. Despite covering less than 0.1% of coastal regions, they have the capacity to bury up to 10% of marine organic matter and can bury the same amount of carbon 35 times faster than tropical rainforests. On land, the soil’s ability to sequestrate carbon is intimately linked to microbial metabolism. Despite the growing attention to the link between plant production, microbial communities, and the carbon cycle in terrestrial ecosystems, these processes remain enigmatic in the sea. Here, we show that seagrasses excrete organic sugars, namely in the form of sucrose, into their rhizospheres. Surprisingly, the microbial communities living underneath meadows do not fully use this sugar stock in their metabolism. Instead, sucrose piles up in the sediments to mM concentrations underneath multiple types of seagrass meadows. Sediment incubation experiments show that microbial communities living underneath a meadow use sucrose at low metabolic rates. Our metagenomic analyses revealed that the distinct community of microorganisms occurring underneath meadows is limited in their ability to degrade simple sugars, which allows these compounds to persist in the environment over relatively long periods of time. Our findings reveal how seagrasses form blue carbon stocks despite the relatively small area they occupy. Unfortunately, anthropogenic disturbances are threatening the long-term persistence of seagrass meadows. Given that these sediments contain a large stock of sugars that heterotopic bacteria can degrade, it is even more important to protect these ecosystems from degradation.
20190822_MS1_A19r-19
创建时间: 2025-01-05 15:48:48
空间分辨率: 17μm,
303x309
扫描: MALDI (CHCA)
物种: Posidonia oceanica (root) - normal
Note
Seagrasses are among the most efficient sinks of carbon dioxide on Earth. While carbon sequestration in terrestrial plants is linked to the microorganisms living in their soils, the interactions of seagrasses with their rhizospheres are poorly understood. Here, we show that the seagrass, Posidonia oceanica excretes sugars, mainly sucrose, into its rhizosphere. These sugars accumulate to µM concentrations—nearly 80 times higher than previously observed in marine environments. This finding is unexpected as sugars are readily consumed by microorganisms. Our experiments indicated that under low oxygen conditions, phenolic compounds from P. oceanica inhibited microbial consumption of sucrose. Analyses of the rhizosphere community revealed that many microbes had the genes for degrading sucrose but these were only expressed by a few taxa that also expressed genes for degrading phenolics. Given that we observed high sucrose concentrations underneath three other species of marine plants, we predict that the presence of plant-produced phenolics under low oxygen conditions allows the accumulation of labile molecules across aquatic rhizospheres.
20190828_MS1_A19r-22
创建时间: 2025-01-06 08:53:53
空间分辨率: 17μm,
292x279
扫描: MALDI (CHCA)
物种: Posidonia oceanica (root) - normal
Note
MS1_20180404_PO_1200
创建时间: 2025-01-06 09:25:09
空间分辨率: 17μm,
193x208
扫描: MALDI (CHCA)
物种: Posidonia oceanica (root) - normal
Note
