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214043

Biosynthesis of Plant Growth Hormones (Indol Acetic Acid and Gibberellin) By Salt-Tolerant Endophytic Fungus Aspergillus terreus SQU14026

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Last updated: 22 Jan 2023

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Abstract

Twenty-seven fungal isolates were isolated from salt-tolerant (halophytes) plants, which were collected randomly from the planted field in Wadi El-Natroun. All isolates screened for production of plant growth hormones (GA and IAA) production and salt tolerance.  All isolates can tolerate salts and produce GA and IAA in varying degrees. The maximum IAA and GA production were obtained by isolating 19 (0.098 and 0.77 µg mlˉ¹ respectively), which can tolerate salts (NaCl) up to 15% with MSC 20 mglˉ¹.  According to DNA and PCR amplification, isolate 19 was identified as Aspergillus terreus strain SQU14026. The optimum culture conditions for a maximum of production growth hormones by Aspergillus terreusstrain SQU14026 were studied. The maximum yield was obtained on the 8th day of incubation at incubation temperature 30oC and pH6 on Czapeks Dox medium containing 10% NaCl, using glucose and ammonium sulphate concentrations (20g and 3g respectively). The high level of IAA and GA production attained by adding 0.2 mg / ml tryptophan to the growth medium under controlled conditions, the production increased by 124.7% and 48.19% respectively compared to their production at 8th day.

DOI

10.21608/eajbsg.2020.214043

Keywords

Indol acetic acid, Gibberellin, Aspergillus terreus, Salt-Tolerant Plants

Authors

First Name

Eglal

Last Name

Ghoniemy

MiddleName

A.

Affiliation

Department of Botany and Microbiology, Faculty of Science, Al-Azhar University (Girls Branch), Cairo, Egypt.

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First Name

Maie

Last Name

El-Khawaga

MiddleName

A.

Affiliation

Department of Botany and Microbiology, Faculty of Science, Al-Azhar University (Girls Branch), Cairo, Egypt.

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First Name

Marwa

Last Name

Abd El-Aziz

MiddleName

A.

Affiliation

Regional Center for Mycology and Biotechnology, Al-Azhar University, Cairo, Egypt

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Orcid

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First Name

Hend

Last Name

Abulila

MiddleName

I.

Affiliation

Regional Center for Mycology and Biotechnology, Al-Azhar University, Cairo, Egypt

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Volume

12

Article Issue

2

Related Issue

16038

Issue Date

2020-12-01

Receive Date

2020-10-29

Publish Date

2020-12-01

Page Start

111

Page End

129

Print ISSN

2090-0872

Online ISSN

2090-0880

Link

https://eajbsg.journals.ekb.eg/article_214043.html

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https://eajbsg.journals.ekb.eg/service?article_code=214043

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11

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Original Article

Type Code

689

Publication Type

Journal

Publication Title

Egyptian Academic Journal of Biological Sciences, G. Microbiology

Publication Link

https://eajbsg.journals.ekb.eg/

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Article

Created At

22 Jan 2023