Ph.D. Tezi Görüntüleme

Student:	Beran FİRİDİN
Supervisor:	Yrd. Doç. Dr. Cengiz MUTLU
Department:	Biyoloji
Institution:	Graduate School of Natural and Applied Sciences
University:	Karadeniz Technical University, Turkey

Title of the Thesis:	The Effect of the Different Food Quality of the Leaves of Alder, Cluster willow and Hazelnut on the Feeding and Development of Agelastica alni (L.) (Coleoptera; Chrysomelidae)
Level:	Ph.D.
Acceptance Date:	6/3/2008
Number of Pages:	111
Registration Number:	Di628

Summary:

In this study, food quality of the some plant species that feeding of Agelastica alni (L., 1758) larvae, a olygophagous herbivore, were changed via fertilization. A. alni larvae, reached the last instar, were investigation in 10 day-feeding experiment using the changed food quality of leaves of young Alnus glutinosa (L.) Gaertn. ssp. glutinosa, old Alnus glutinosa ssp. glutinosa, Salix babylonica and Corylus avellana. Especially, effect types of various chemical compounds was investigated on the larvae of A. alni, damage to the northeast population of alder in our country.

It was determinated that A. alni larvae balanced to the nitrogen utilization at some degree, despite to the increase on nitrogen level of the leaves.Although the nitrogen content of Corylus avellana changes from 2,97 % to 4,33, the efficiency of nitrogen utilization of larvae decrease from 16,54 % to 12,77. Although the nitrogen content of, Salix babylonica changes from 2,47 % to 3,68, the efficiency of nitrogen utilization of larvae increase from 11,92 % to 14,86. Although the nitrogen content of young Alnus glutinosa ssp. glutinosa changes from 4,27 % to 5,34 the efficiency of nitrogen utilization of larvae decrease from 22,72 % to 24,53. Although the nitrogen content of old Alnus glutinosa ssp. glutinosa changes from 4,04 % to 4,66, the efficiency of nitrogen utilization of larvae increase from 21,27 % to 23,71 The chemical analysis demonstrated that the total phenolics and proanthocyanidin leves of the leaves were high on using plant species. Although the efficiency of conversion of digested food of the larvae was low, the

of secondary compounds. This finding supported that the idea of secondary compounds have postdigestive

effects on some organisms. This study indicated that the larvae of A. alni have a developed nitrogen homeostasis, which containing the decrease of the predation risk, and regulatory mechanisms to the deterrent

secondary compounds on it’s digestion system.

Keywords: Agelastica alni, Larva, Nitrogen Homeostasis, Proanthocyanidin, AD, NUE, ECI