Salt response of the freshwater microalga <italic style="font-style: italic">Scenedesmus</italic> <italic style="font-style: italic">obliquus</italic> (Turp.) Kutz is modulated by the algal growth phase

MohamedEL-KATONY Taha; FaizEL-ADL Magda

doi:10.1007/s00343-019-9067-z

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Salt response of the freshwater microalga Scenedesmus obliquus (Turp.) Kutz is modulated by the algal growth phase

Updated：2023-05-19

- Salt response of the freshwater microalga Scenedesmus obliquus (Turp.) Kutz is modulated by the algal growth phase
- Salt response of the freshwater microalga Scenedesmus obliquus (Turp.) Kutz is modulated by the algal growth phase
- 海洋湖沼学报（英文） 2020年38卷第3期页码：802-815
- Affiliations：
  
  Department of Botany and Microbiology, Faculty of Science, Damietta University, New Damietta City 34517, Egypt
- Author bio：
  
  Taha Mohamed EL-KATONY, tmsoliman2000@yahoo.co.uk
- Funds：
  
  © Chinese Society for Oceanology and Limnology, Science Press and Springer-Verlag GmbH Germany, part of Springer Nature 2020
- DOI：10.1007/s00343-019-9067-z
  中图分类号：
- 收稿：2019-03-14，
  
  录用：2019-7-2，
  
  网络首发：2019-09-05，
  
  纸质出版：2020-03
- Accepted：
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Salt response of the freshwater microalga Scenedesmus obliquus (Turp.) Kutz is modulated by the algal growth phase[J]. 海洋湖沼学报（英文）, 2020,38(3):802-815.

MohamedEL-KATONY Taha, FaizEL-ADL Magda. Salt response of the freshwater microalga Scenedesmus obliquus (Turp.) Kutz is modulated by the algal growth phase[J]. Journal of Oceanology and Limnology, 2020, 38(3): 802-815.
Salt response of the freshwater microalga Scenedesmus obliquus (Turp.) Kutz is modulated by the algal growth phase[J]. 海洋湖沼学报（英文）, 2020,38(3):802-815. DOI： 10.1007/s00343-019-9067-z.

MohamedEL-KATONY Taha, FaizEL-ADL Magda. Salt response of the freshwater microalga Scenedesmus obliquus (Turp.) Kutz is modulated by the algal growth phase[J]. Journal of Oceanology and Limnology, 2020, 38(3): 802-815. DOI： 10.1007/s00343-019-9067-z.

摘要

Abstract

Growth and biochemical responses of the coenobial green alga

Scenedesmus obliquus

to salinity stress were monitored across different phases of growth. The alga was cultured on BG11 growth medium and subjected to 0

100

and 200 mmol/L NaCl for a period of 20 d

during which algal cultures were harvested at 4-d intervals. The salinity-induced inhibition of algal growth was accompanied with prolongation of timing of the different growth phases. The sharp and progressive salinity-induced inhibition of algal growth rate during the early phase of growth points to salt shock but moderation of inhibition at the subsequent stages of growth means algal acclimation to salinity. The concentrations of chlorophylls

and

soluble sugars

proteins as well as those of K

and Na

in the alga exhibited peaks at the initiation of the exponential phase of growth

with increasing magnitude in proportion to the increase in the level of salinity. Nevertheless

whereas soluble sugars of the alga peaked at initiation of the exponential phase

starch concentration progressively increased with culture age

reaching saturation towards the stationary phase. Whereas the salinity-induced increase in soluble sugars was most evident at the early stages of growth the reverse was true for starch. The present results point to fast acclimation of

obliquus

to salt stress post a brief salt shock

utilizing soluble sugars

and Na

for osmotic adjustment. Increasing salinity from 0 to 200 mmol/L NaCl led to progressive increase in soluble sugars

proteins

and Na

concentrations of the algal cells

particularly at the early stages of growth. However

the salinity-induced increase in chlorophyll concentration approached a limit at 100 mmol/L NaCl whereas that in starch concentration was more evident at the later stages of growth.

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Keywords

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Salt response of the freshwater microalga Scenedesmus obliquus (Turp.) Kutz is modulated by the algal growth phase

Salt response of the freshwater microalga Scenedesmus obliquus (Turp.) Kutz is modulated by the algal growth phase

DOI：10.1007/s00343-019-9067-z

摘要

Abstract

关键词

Keywords

references