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Deanship of Graduate Studies
Document Details
Document Type
:
Thesis
Document Title
:
A COMPARATIVE STUDY ON INHIBITION OF CHEMICAL DEFENCES IN MACROALGAE BY HERBIVORES, WATER-BORN CUES “
"دراسة مقارنة عن تحريض الدفاعات الكيميائية فى الطحالب الكبيرة بواسطة الحيوانات العاشبة والمنبهات التى تنتقل عن طريق الماء والميكروبات"
Subject
:
Faculty of Marine Sciences
Document Language
:
Arabic
Abstract
:
Macroalgae showed different defense strategies against herbivores and colonizing microbial communities in the marine environment. To prevent the colonization of other organisms and herbivore attack, macroalgae are reported to produce variety of metabolites that will help them by providing protection. Generally, productions of bioactive metabolites in macroalgae are induced by environmental factors, herbivore attack and pathogens. In this study, two macroalgal species, Halimeda sp. and Dictyota sp. were collected from the Jeddah coastal waters of the Red Sea and stimulated by different methods such as mechanical damage, local wounding, neighboring effects, epibiotic bacteria and herbivores to induce the chemical defense. The induced and control macroalgal samples were extracted with methanol and tested against biofilm-forming bacterial strain and gastropod species. The macroalgal samples subjected to induction in the present study showed strong growth inhibitory activity against the biofilm-forming bacteria than the normal samples. The extracts obtained from the macroalgal samples subjected to different induction experiments also showed strong effects on the motility of gastropods. Since, inducible defenses are reported to have important role in structuring the ecological communities, results obtained in this study will improve our knowledge on plant-animal interactions in marine ecosystems and will provide more detail on the chemical ecology of Red Sea macroalgae.
Supervisor
:
Dr. Satheesh Sathianeson
Thesis Type
:
Master Thesis
Publishing Year
:
1439 AH
2017 AD
Co-Supervisor
:
Prof. Mohsen. El-Sherbiny
Added Date
:
Monday, December 25, 2017
Researchers
Researcher Name (Arabic)
Researcher Name (English)
Researcher Type
Dr Grade
Email
اشواق عتيق عسيري
Asiri, Ashwaq Ateeq
Researcher
Master
Files
File Name
Type
Description
42969.pdf
pdf
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