TY - JOUR

T1 - Differences in adaptation to light and temperature extremes of Chlorella sorokiniana strains isolated from a wastewater lagoon

AU - Krimech, Aafaf

AU - Helamieh, Mark

AU - Wulf, Melina

AU - Krohn, Ines

AU - Riebesell, Ulf

AU - Cherifi, Ouafa

AU - Mandi, Laila

AU - Kerner, Martin

N1 - Copyright © 2022. Published by Elsevier Ltd.

PY - 2022/4/1

Y1 - 2022/4/1

N2 - Presently, two Chlorella sorokiniana strains sampled during summer (CS-S) and winter (CS-W) from a maturation pond and isolated by dominance were studied on their behavior on temperature and light extremes in batch experiments. Although both strains showed no differences in their tolerance of temperatures up to 45 °C, the growth rates, pigment contents and fatty acid compositions in response to PAR at 700 and 1,500 µmol m−2 sec-1 differed. CS-W was less affected by photoinhibition and maintained constantly high growth rates. High radiation resulted in both strains in an equivalent decrease of chlorophyll a and accessory pigments indicating that the latter did not function as a light filter. PUFAS (18:3 and 16:3) increased in CS-W at high radiation by > 60% and decreased in CS-S by 8 %. Results indicate that CS-W is highly favorable for mass cultivation particularly in outdoors, in which diurnal variations of solar radiation occur.

AB - Presently, two Chlorella sorokiniana strains sampled during summer (CS-S) and winter (CS-W) from a maturation pond and isolated by dominance were studied on their behavior on temperature and light extremes in batch experiments. Although both strains showed no differences in their tolerance of temperatures up to 45 °C, the growth rates, pigment contents and fatty acid compositions in response to PAR at 700 and 1,500 µmol m−2 sec-1 differed. CS-W was less affected by photoinhibition and maintained constantly high growth rates. High radiation resulted in both strains in an equivalent decrease of chlorophyll a and accessory pigments indicating that the latter did not function as a light filter. PUFAS (18:3 and 16:3) increased in CS-W at high radiation by > 60% and decreased in CS-S by 8 %. Results indicate that CS-W is highly favorable for mass cultivation particularly in outdoors, in which diurnal variations of solar radiation occur.

KW - Isolation by dominance

KW - Microalgae

KW - Outdoor mass cultivation

KW - Pigment and fatty acid composition

KW - Reuse of treated wastewater, adaptation to extreme conditions

KW - Chemistry

UR - http://www.scopus.com/inward/record.url?scp=85125568113&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/f8fc0876-4258-36ec-990c-2d69f7cee0c0/

U2 - 10.1016/j.biortech.2022.126931

DO - 10.1016/j.biortech.2022.126931

M3 - Journal articles

C2 - 35247554

AN - SCOPUS:85125568113

VL - 350

JO - Bioresource Technology

JF - Bioresource Technology

SN - 0960-8524

M1 - 126931

ER -