Variation in growth rate, carbon assimilation, and photosynthetic efficiency in response to nitrogen source and concentration in phytoplankton isolated from upper San Francisco Bay
Berg, GM; Driscoll, S; Hayashi, K; Ross, M; Kudela, R
HERO ID
3844787
Reference Type
Journal Article
Year
2017
Language
English
PMID
| HERO ID | 3844787 |
|---|---|
| In Press | No |
| Year | 2017 |
| Title | Variation in growth rate, carbon assimilation, and photosynthetic efficiency in response to nitrogen source and concentration in phytoplankton isolated from upper San Francisco Bay |
| Authors | Berg, GM; Driscoll, S; Hayashi, K; Ross, M; Kudela, R |
| Journal | Journal of Phycology |
| Volume | 53 |
| Issue | 3 |
| Page Numbers | 664-679 |
| Abstract | Six species of phytoplankton recently isolated from upper San Francisco Bay were tested for their sensitivity to growth inhibition by ammonium (NH4(+) ), and for differences in growth rates according to inorganic nitrogen (N) growth source. The quantum yield of photosystem II (Fv /Fm ) was a sensitive indicator of NH4(+) toxicity, manifested by a suppression of Fv /Fm in a dose-dependent manner. Two chlorophytes were the least sensitive to NH4(+) inhibition, at concentrations of >3,000 μmoles NH4(+) · L(-1) , followed by two estuarine diatoms that were sensitive at concentrations >1,000 μmoles NH4(+) · L(-1) , followed lastly by two freshwater diatoms that were sensitive at concentrations between 200 and 500 μmoles NH4(+) · L(-1) . At non-inhibiting concentrations of NH4(+) , the freshwater diatom species grew fastest, followed by the estuarine diatoms, while the chlorophytes grew slowest. Variations in growth rates with N source did not follow taxonomic divisions. Of the two chlorophytes, one grew significantly faster on nitrate (NO3(-) ), whereas the other grew significantly faster on NH4(+) . All four diatoms tested grew faster on NH4(+) compared with NO3(-) . We showed that in cases where growth rates were faster on NH4(+) than they were on NO3(-) , the difference was not larger for chlorophytes compared with diatoms. This holds true for comparisons across a number of culture investigations suggesting that diatoms as a group will not be at a competitive disadvantage under natural conditions when NH4(+) dominates the total N pool and they will also not have a growth advantage when NO3(-) is dominant, as long as N concentrations are sufficient. |
| Doi | 10.1111/jpy.12535 |
| Pmid | 28328165 |
| Wosid | WOS:000402675300017 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Language Text | English |