Table II.A.2 Fastest growing strains from Arizona State University collection.

Re-Distributed by http://www.tpub.com

National Renewable Energy Laboratory

Table II.A.2 Fastest growing strains from Arizona State University collection.

Strain

Genus

Class

Growth Rate

Medium

(doublings.day-1)

OSCIL2

Oscillatoria

Cyanophyceae

4.23

I/55

OSCIL3

Oscillatoria

Cyanophyceae

3.50

I/55

CHLOC4

Chlorococcum/

Chlorophyceae

3.47

I/55

Eremosphaera

SYNEC5

Synechococcus

Cyanophyceae

3.25

II/55

ASU0735

Oscillatoria

Cyanophyceae

3.06

I/55

AMPHO46

Amphora

Bacillariophyceae

2.81

I/55

NANNO13

Nannochloris

Chlorophyceae

2.78

I/55

POLYC1

Synechococcus

Cyanophyceae

2.73

I/55

CHLOR23

Chlorella

Chlorophyceae

2.66

I/55

SYNEC3

Synechococcus

Cyanophyceae

2.51

II/55

The lipid production potential of these strains was evaluated by the use of the fluorometric Nile

Red assay. In Type I/55 medium, 49 strains had a higher apparent lipid content after 2 days of

N-deficient growth, whereas 13 strains had the same or lower apparent lipid levels in response to

N deficiency. In Type II/55 medium, 42 strains had higher lipid levels, and seven had lower or

unchanged lipid levels as a consequence of N deficiency. Of note was that the mean lipid level

in cells grown in Type II/55 medium was nearly twice that of Type I/55-grown cells.

The strains exhibiting the highest Nile Red fluorescence levels are shown in Table II.A.3. All

these strains are diatoms, confirming the propensity of this group to accumulate lipids.

A Look Back at the Aquatic Species Program--Technical Review