Abstract
The freshwater diatom Asterionella formosa Haas. was grown in semicontinuous culture at 20°C under continuous cool‐white fluorescent light of ca. 20 μEin · m−2· s ·−1 in a medium containing Si: P in various concentration ratios. The cell quotas of P and Si changed in relation to the available concentrations of P and Si at constant μ= 0.11 and 0.16 d−1. Under Si‐limitation, the P cell quota increased by over an order of magnitude as the influent [Si:P] decreased. The Si cell quota increased with increase in [Si] in the influent medium, and it increased as [P] increased at a specific [Si]. Under P‐limitation, the P cell quotas were fairly constant and low; the Si cell quotas were relatively high and decreased slightly as influent [P] and [Si] increased. Asterionella stored up to 28 times more P and 2 times more Si than needed. The number of Asterionella cells per colony varied as a function of the influent [Si:P] and nutrient limitation being usually less than or equal to 6 when P‐limited, and greater than 10 when Si‐limited.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 420-424 |
| Number of pages | 5 |
| Journal | Journal of Phycology |
| Volume | 17 |
| Issue number | 4 |
| DOIs | |
| State | Published - Dec 1981 |
| Externally published | Yes |
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Keywords
- Asterionella
- cell quotas
- diatom
- nutrients
- phosphate
- silicate
ASJC Scopus subject areas
- Aquatic Science
- Plant Science
Cite this
EFFECTS OF Si:P CONCENTRATION RATIOS AND NUTRIENT LIMITATION ON THE CELLULAR COMPOSITION AND MORPHOLOGY OF ASTERIONELLA FORMOSA (BACILLARIOPHYCEAE). / Holm, Nancy L; Armstrong, David E.
In: Journal of Phycology, Vol. 17, No. 4, 12.1981, p. 420-424.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - EFFECTS OF Si:P CONCENTRATION RATIOS AND NUTRIENT LIMITATION ON THE CELLULAR COMPOSITION AND MORPHOLOGY OF ASTERIONELLA FORMOSA (BACILLARIOPHYCEAE)
AU - Holm, Nancy L
AU - Armstrong, David E.
PY - 1981/12
Y1 - 1981/12
N2 - The freshwater diatom Asterionella formosa Haas. was grown in semicontinuous culture at 20°C under continuous cool‐white fluorescent light of ca. 20 μEin · m−2· s ·−1 in a medium containing Si: P in various concentration ratios. The cell quotas of P and Si changed in relation to the available concentrations of P and Si at constant μ= 0.11 and 0.16 d−1. Under Si‐limitation, the P cell quota increased by over an order of magnitude as the influent [Si:P] decreased. The Si cell quota increased with increase in [Si] in the influent medium, and it increased as [P] increased at a specific [Si]. Under P‐limitation, the P cell quotas were fairly constant and low; the Si cell quotas were relatively high and decreased slightly as influent [P] and [Si] increased. Asterionella stored up to 28 times more P and 2 times more Si than needed. The number of Asterionella cells per colony varied as a function of the influent [Si:P] and nutrient limitation being usually less than or equal to 6 when P‐limited, and greater than 10 when Si‐limited.
AB - The freshwater diatom Asterionella formosa Haas. was grown in semicontinuous culture at 20°C under continuous cool‐white fluorescent light of ca. 20 μEin · m−2· s ·−1 in a medium containing Si: P in various concentration ratios. The cell quotas of P and Si changed in relation to the available concentrations of P and Si at constant μ= 0.11 and 0.16 d−1. Under Si‐limitation, the P cell quota increased by over an order of magnitude as the influent [Si:P] decreased. The Si cell quota increased with increase in [Si] in the influent medium, and it increased as [P] increased at a specific [Si]. Under P‐limitation, the P cell quotas were fairly constant and low; the Si cell quotas were relatively high and decreased slightly as influent [P] and [Si] increased. Asterionella stored up to 28 times more P and 2 times more Si than needed. The number of Asterionella cells per colony varied as a function of the influent [Si:P] and nutrient limitation being usually less than or equal to 6 when P‐limited, and greater than 10 when Si‐limited.
KW - Asterionella
KW - cell quotas
KW - diatom
KW - nutrients
KW - phosphate
KW - silicate
UR - http://www.scopus.com/inward/record.url?scp=84985201204&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84985201204&partnerID=8YFLogxK
U2 - 10.1111/j.1529-8817.1981.tb00873.x
DO - 10.1111/j.1529-8817.1981.tb00873.x
M3 - Article
AN - SCOPUS:84985201204
VL - 17
SP - 420
EP - 424
JO - Journal of Phycology
JF - Journal of Phycology
SN - 0022-3646
IS - 4
ER -