EFFECTS OF SALINITY ON THE GROWTH AND FATTY ACID COMPOSITION OF SIX STRAINS OF MARINE DIATOMS
LIANG Ying
MAI Kangsen
SUN Shichun
HUANG Guoxiao
HU Haiyan
Abstract：The effect of salinity (18‰,28‰ and 38‰) on the growth and fatty acid composition of six strains of marine diatoms Chaetoceros gracilis(B13),Cylindrotheca fusiformis (B211),Phaeodactylum tricornutum(B114,B118 and B221) and Nitzschia closterium (B222) was investigated.The relative growth rate showed an increase in B13 and a decrease in B114 and B222 with the increase of salinity.The dry weight of B13 increased with the increase of salinity and reached its highest value(0.21)at the highest salinity(38‰).The dry weight of B114,B118,B221 and B222 both reached their highest values(0.26,0.32,0.40 and 0.30,respectively) at salinity 28‰.No significant difference Was observed in B211 (O.35～0.36).The major fatty acids of the 6 strains were 16:0, 16:1(n-7) and 20:5(n-3).B211 also had a high percentage of 20:4n-6 (5.6～7.4%).B13 also had a high percentage of 14:0(20.0～30.9%).Saturated fatty acids decreased with the increase of salinity in B211,B221 and B222,and reached their higllest values in 18‰ in B211(41.7%),B221(37.6%) and B222(31.7%),and in 28‰ in B13(48.1%),B114 (33.0%)and B118 (31.0%).Monounsaturated fatty acids increased in B114,B118,B221 and B222 while decreased in B13 and B211 with the increase of salinity.Polyunsaturated fatty acids had their highest values in 18‰ in B13(31.3%),B114 (19.6%),B118(23.4%) and B222(18.6%),and in 28‰ in B211(25.1%)and B221(16.3%).
Keywords：Diatomsalinityrelative growth ratedry weightfatty acid
Publication Date：2000-01-01
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：10( 53-62 )