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115975

EFFECT OF DIFFERENT LIGHT WAVE LENGTHS ON THE GROWTH AND OIL CONTENT OF <i>CHLORELLA VULGARIS</i>

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Last updated: 26 Dec 2024

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Abstract

Cultures of Chlorella vulgaris were grown in fully transparent polyethylene bottles 20L and exposed to different light colors (i.e.; yellow, green, blue, red and white) by covering the growth vessel with fully transparency colored Nylon sheets with fixed light quantity (120µ.e), growth containers provide the desired light. Growth was performed with fully recommended media of BG-11. By the end of growth period (17 days), oils were also determined. Growth parameters including dry weight, total chlorophyll and carotenes were daily assessed. Growth parameters were varied due to the used containers color type. Yellow and white colors enhanced dry weight accumulation, despite inhibited chlorophyll accumulation. Maximum chlorophyll content was obtained by green light grown cultures followed by blue and red lights. Carotenoids were increased with all used colored light, but green light represented the lowest increase as compared with control culture at zero time. Concerning dry weight growth evaluation, maximum growth rate (µmax.) was found to be the highest with cultures exposed to yellow color followed by white color. On the contrast, a negative relationship was observed with cultures that exposed to red light. As for total chlorophyll, slight differences were observed. Regarding carotenes, green and red colors represented the lowest, while white, yellow and blue colors had a little difference. The oil content was found to be slightly associated with carotenoids. White color container represented the maximum oil content following by the blue and yellow color. Oil content was closely related to carotenes content and maximum oil content was observed with yellow light grown alga (12.7%), followed by 10.02% of blue light comparing with 9.4% of white light (control) and 9.34% of red light. The lowest oil content was observed with green light that gave 8.22%.

DOI

10.21608/egyjs.2016.115975

Keywords

<i>Chlorella Vulgaris</i>, light color, dry weight, total chlorophyll, Carotenoids, Oil content

Authors

First Name

A.

Last Name

El-Sayed

MiddleName

B.

Affiliation

Algal Biotechnology Unit, National Research Centre, Dokki- Cairo, Egypt

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Orcid

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First Name

Olfat

Last Name

Salem

MiddleName

M. A.

Affiliation

Botany and microbiology department, Faculty of Science, Helwan University, Egypt

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Volume

17

Article Issue

1

Related Issue

17545

Issue Date

2016-11-01

Receive Date

2016-04-29

Publish Date

2016-11-30

Page Start

17

Page End

32

Print ISSN

1110-8649

Online ISSN

2735-3826

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https://egyjs.journals.ekb.eg/article_115975.html

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https://egyjs.journals.ekb.eg/service?article_code=115975

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2

Type

Original Article

Type Code

1,365

Publication Type

Journal

Publication Title

Egyptian Journal of Phycology

Publication Link

https://egyjs.journals.ekb.eg/

MainTitle

EFFECT OF DIFFERENT LIGHT WAVE LENGTHS ON THE GROWTH AND OIL CONTENT OF <i>CHLORELLA VULGARIS</i>

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Article

Created At

23 Jan 2023