Response of polyamine pools in marine phytoplankton to nutrient limitation and variation in temperature and salinity

Liu, Qian; Nishibori, Naoyoshi; Imai, Ichiro; Hollibaugh, James T.

doi:10.3354/meps11583

Cited by 27 publications

(36 citation statements)

References 54 publications

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“…Polyamines are indeed taken up rapidly and mineralized by heterotrophs in the SAB (Liu et al ). The fact that heterotrophic assimilation of spermine and spermidine is typically faster than PUT (as judged by kinetic experiments with cultures and turnover rates in seawater; Tabor and Tabor ; Liu et al ) suggests these two polyamines may also play a significant role in marine nitrification if polyamine‐N oxidation is dependent on remineralization, particularly given high concentrations of intracellular spermidine in marine diatoms and cyanobacteria (Hamana and Matsuzaki ; Nishibori and Nishijima ; Liu et al ).…”

Section: Discussionmentioning

confidence: 99%

“…They are ubiquitous in eukaryotic and prokaryotic cells where they participate in integral cellular processes such as nucleic acid synthesis and stabilization, biosilica precipitation in diatoms, and protein synthesis (Kröger et al ; Iacomino et al ). Polyamines are present at millimolar concentrations in phytoplankton and bacterial cells (e.g., Tabor and Tabor ; Nishibori and Nishijima ; Liu et al ), but their standing stocks in aquatic environments are in the low nanomolar or picomolar range, suggesting rapid biogeochemical cycling (Nishibori et al , b ; Lu et al ; Liu et al ; Krempaska et al ). Recent work has expanded our understanding of polyamine assimilation and the cycling of polyamine carbon (C) in aquatic systems (e.g., Poretsky et al ; Mou et al , ; Liu et al ; Lu et al ; Krempaska et al ), but little is known about the fate of polyamine‐N.…”

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confidence: 99%

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Microbial oxidation of nitrogen supplied as selected organic nitrogen compounds in the South Atlantic Bight

Damashek

Tolar

Liu

et al. 2018

Limnology & Oceanography

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Dissolved organic nitrogen (DON) can account for a large fraction of the dissolved nitrogen (N) pool in the ocean, but the cycling of marine DON is poorly understood. Recent discoveries that urea-and cyanate-N can be oxidized by some strains of Thaumarchaeota suggest that these abundant microbes may be able to access and oxidize a fraction of the DON pool. However, measurements of the oxidation of N supplied as DON compounds are scarce. Here, we compare oxidation rates of N supplied as a variety of DON compounds in samples from Georgia coastal waters, where nitrifier communities are numerically dominated by Thaumarchaeota. Our data indicate that polyamine-N is particularly amenable to oxidation compared to the other DON compounds tested. Oxidation of N supplied as putrescine (1,4-diaminobutane) was generally higher than that of N supplied as glutamate, arginine, or urea, and was consistently 5-10% of the ammonia oxidation rate. Our data also suggest that the oxidation rate of polyamine-N may increase as the length of the carbon skeleton increases. Oxidation of N supplied as putrescine, urea, and glutamate were all highest near the coast and lower further offshore, consistent with patterns of ammonia oxidation in these waters. Though it is unclear whether oxidation of polyamine-N reflects direct oxidation by Thaumarchaeota or combines remineralization and subsequent ammonia oxidation, more rapid oxidation of N from putrescine compared to amino acids or urea suggests that polyamine-N may contribute significantly to nitrification in the ocean.

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Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

Microbial oxidation of nitrogen supplied as selected organic nitrogen compounds in the South Atlantic Bight

Damashek

Tolar

Liu

et al. 2018

Limnology & Oceanography

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“…Free-form polyamines transported between cell organelles are the most easily extracted and analyzed polyamines. Previous reports have suggested that microalgae have more types of free-form polyamines than other organisms [48,49,50,51,52,53,54,55,56,57]. In addition to Put, Spd, and Spm, which are common to animal cells, microalgae also contain Dap, Cad, NSpd, and NSpm, which are usually found in plants and microorganisms (Table 1).…”

Section: Polyamine Composition Of Microalgaementioning

confidence: 96%

“…Putrescine (Put), spermidine (Spd), and Spermine (Spm) are typically found in most cells as common polyamines. In some plants and microorganisms, uncommon polyamines such as diaminopropane (Dap), cadaverine (Cad), nor-spermidine (NSpd), thermospermine (TSpm), branched chain polyamines, and long-chain polyamines (LCPAs) have also been identified (Figure 1) [41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57].…”

Section: Polyamine Composition Of Microalgaementioning

confidence: 99%

Polyamines in Microalgae: Something Borrowed, Something New

Lin

2018

Marine Drugs

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Microalgae of different evolutionary origins are typically found in rivers, lakes, and oceans, providing more than 45% of global primary production. They provide not only a food source for animals, but also affect microbial ecosystems through symbioses with microorganisms or secretion of some metabolites. Derived from amino acids, polyamines are present in almost all types of organisms, where they play important roles in maintaining physiological functions or against stress. Microalgae can produce a variety of distinct polyamines, and the polyamine content is important to meet the physiological needs of microalgae and may also affect other species in the environment. In addition, some polyamines produced by microalgae have medical or nanotechnological applications. Previous studies on several types of microalgae have indicated that the putative polyamine metabolic pathways may be as complicated as the genomes of these organisms, which contain genes originating from plants, animals, and even bacteria. There are also several novel polyamine synthetic routes in microalgae. Understanding the nature of polyamines in microalgae will not only improve our knowledge of microalgal physiology and ecological function, but also provide valuable information for biotechnological applications.

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“…The history of the polyamines began in 1678 with the discovery by Leeuwenhoek of the crystallization of spermine from human semen [1]. Polyamines are ubiquitous in nature where play an important role in a cell growth and differentiation [2] [3] [4]. At a physiological pH the naturally occurring polyamines, spermidine (H 2 N(CH 2 ) 3 NH(CH 2 ) 4 NH 2 ), spermine (H 2 N(CH 2 ) 3 NH(CH 2 ) 4 NH(CH 2 ) 3 NH 2 ) and their diamine precursor putrescine (H 2 N(CH 2 ) 4 NH 2 ), are positively charged, and interact with nucleic acids, proteins and phospholipides, affecting their structure and function [5].…”

Section: Introductionmentioning

confidence: 99%