### Abstract

Monocolonal cultures of R. gibba were exposed to three levels of nitrate-nitrogen. Nutrient-diffusing substrates were used in a lake environment to create nine microhabitats of varying N and P ratios for natural populations of R. gibba and E. turgida. The number of endosymbionts per diatom increased as ambient N became limiting; mean endosymbiont volume increased as N increased. The mean endosymbiont surface area:volume ratio decreased with inceasing N. Total endosymbiont volume per diatom (the product of the number of endosymbionts per diatom and their individual biovolumes) did not have a simple response to increasing N. Phosphorous limitation uncoupled the relationship between endosymbiont load and N. Flexibility of the endosymbiont load can reduce the metabolic cost to the diatom if the endosymbionts are dependent on the diatom for a resource. -from Authors

Original language | English (US) |
---|---|

Pages (from-to) | 773-777 |

Number of pages | 5 |

Journal | Journal of Phycology |

Volume | 28 |

Issue number | 6 |

State | Published - 1992 |

Externally published | Yes |

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### ASJC Scopus subject areas

- Aquatic Science
- Plant Science

### Cite this

*Journal of Phycology*,

*28*(6), 773-777.

**Effects of nitrogen and phosphorus on the endosymbiont load of Rhopalodia gibba and Epithemia turgida (Bacillariophyceae).** / Deyoe, H. R.; Lowe, R. L.; Marks, Jane C.

Research output: Contribution to journal › Article

*Journal of Phycology*, vol. 28, no. 6, pp. 773-777.

}

TY - JOUR

T1 - Effects of nitrogen and phosphorus on the endosymbiont load of Rhopalodia gibba and Epithemia turgida (Bacillariophyceae)

AU - Deyoe, H. R.

AU - Lowe, R. L.

AU - Marks, Jane C

PY - 1992

Y1 - 1992

N2 - Monocolonal cultures of R. gibba were exposed to three levels of nitrate-nitrogen. Nutrient-diffusing substrates were used in a lake environment to create nine microhabitats of varying N and P ratios for natural populations of R. gibba and E. turgida. The number of endosymbionts per diatom increased as ambient N became limiting; mean endosymbiont volume increased as N increased. The mean endosymbiont surface area:volume ratio decreased with inceasing N. Total endosymbiont volume per diatom (the product of the number of endosymbionts per diatom and their individual biovolumes) did not have a simple response to increasing N. Phosphorous limitation uncoupled the relationship between endosymbiont load and N. Flexibility of the endosymbiont load can reduce the metabolic cost to the diatom if the endosymbionts are dependent on the diatom for a resource. -from Authors

AB - Monocolonal cultures of R. gibba were exposed to three levels of nitrate-nitrogen. Nutrient-diffusing substrates were used in a lake environment to create nine microhabitats of varying N and P ratios for natural populations of R. gibba and E. turgida. The number of endosymbionts per diatom increased as ambient N became limiting; mean endosymbiont volume increased as N increased. The mean endosymbiont surface area:volume ratio decreased with inceasing N. Total endosymbiont volume per diatom (the product of the number of endosymbionts per diatom and their individual biovolumes) did not have a simple response to increasing N. Phosphorous limitation uncoupled the relationship between endosymbiont load and N. Flexibility of the endosymbiont load can reduce the metabolic cost to the diatom if the endosymbionts are dependent on the diatom for a resource. -from Authors

UR - http://www.scopus.com/inward/record.url?scp=0027011720&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0027011720&partnerID=8YFLogxK

M3 - Article

VL - 28

SP - 773

EP - 777

JO - Journal of Phycology

JF - Journal of Phycology

SN - 0022-3646

IS - 6

ER -