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 TypeDr GradeEmail
اشواق عتيق عسيريAsiri, Ashwaq AteeqResearcherMaster 

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