Plant Seedling Growth Stimulation and Antifungal Activities of Volatile Organic Compounds Emitted by Aspergillus flavus Endophyte
Publish place: Journal of Applied Biotechnology Reports، Vol: 9، Issue: 4
Publish Year: 1401
نوع سند: مقاله ژورنالی
زبان: English
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JR_JABR-9-4_005
تاریخ نمایه سازی: 24 بهمن 1401
Abstract:
Introduction: Volatile Organic Compounds (VOCs) produced by Plant Growth Promoting fungi (PGPF) have recently been investigated due to their role in plant growth promotion and defense. Whereas many VOCs produced by PGPF promote seed growth. It is known that VOCs, among several other mechanisms, are responsible for the antagonistic activity produced by microorganisms. In this study, we focused on a comparative study between the VOCs emitted by the endophyte A. flavus AFEG-۲۰۱۷ and its host plant (Eleocharis geniculata) and the role of these VOCs in the growth promotion and biological control of some economic plants. Materials and Methods: VOCs from AFEG-۲۰۱۷ and E. geniculata were extracted using ethyl acetate. Then, the analysis of emitted VOCs was accomplished by using gas chromatography mass (GC-MS). Seedling stimulation assay was investigated on seeds of Trigonella foenum-graecum, Solanum lycopersicum, Portulaca oleracea, and Lepidium sativum. In addition, the antifungal activity of VOCs was evaluated against some plant pathogenic fungi. Results: The GC-MS analysis of the volatile emitted from A. flavus (AFEG-۲۰۱۷) resulted in ۲۵ organic and bioactive compounds; of them ۲-(۲-hydroxy-۳-isobutoxypropyl) pent-۴-enoic acid, hydrazide was the most abundant compound. The findings of the present study advocate that linalool, linalyl acetate, geranyl acetate, oleic acid, ۱-eicosanol, and ۱-chloro-octadecane are suitable as biocontrol agents against phytopathogenic fungi. In addition, the volatiles of Euphorbia geniculata showed ۲۸ bioactive compounds, in which Phytol was the most abundant one. The VOCs produced by AFEG-۲۰۱۷ enhanced the seedling growth of T. foenum-graecum, S. lycopersicum, P. oleracea, and L. sativum. Also, VOCS showed inhibition in the tested pathogenic fungi growth like Fusarium oxysporum which showed the highest inhibition percentage in the growth (۴۰%). Conclusions: This study proved that there is a harmony between VOCs produced by the medicinal plant E. geniculata and its endophyte A. flavus. These volatiles could successfully accelerate plant seeding and limit the growth of some important phytopathogens.
Authors
Fatma Abdel-Motaal
Botany Department, Faculty of Science, Aswan University, Aswan ۸۱۵۲۸, Egypt
Noha Kamel
Botany Department, Faculty of Science, Aswan University, Aswan ۸۱۵۲۸, Egypt
Soad El-Zayat
Botany Department, Faculty of Science, Aswan University, Aswan, Egypt
Abou El-Hamd Mohamed
Chemistry Department, Faculty of Science, Aswan University, Aswan ۸۱۵۲۸, Egypt
Doaa Darwish
Botany Department, Faculty of Science, Mansoura University, Mansoura ۳۵۵۱۱, Egypt