Search for dissertations about: "defence mechanism"

Showing result 1 - 5 of 116 swedish dissertations containing the words defence mechanism.

2. 1. Antipredator defence in butterflies

   Author : Martin Olofsson; Christer Wiklund; Graeme Ruxton; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Antipredator defence; Bird; Crypsis; Predator; Predator-prey interaction; Prey-attack behavior; Butterfly; Deimatic behavior; Eyespots; Startle display; zoologisk ekologi; Animal Ecology;

   Abstract : Predation exerts a potent selection mechanism and has resulted in a suite of antipredation adaptations encompassing morphological and behavioral traits in prey. In butterflies, several such traits appear to be directed towards birds which are considered as one of their major predators. READ MORE

4. 2. Defence and signalling in Potato-Phytophthora infestans interactions

   Author : Ashfaq Ali; Biologiska institutionen; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Phytophthora infestans; Plant defence; hypersensitive response; resistance; susceptibility;

   Abstract : Potato is one of the major food crops and its yield is severely affected by late blight disease caused by Phytophthora infestans. P. infestans has the ability to manipulate plant defence signalling by secreting effector molecules causing so called effector triggered susceptibility. READ MORE

5. 3. Qualities in the short life : psychological studies relevant to patient and spouse in malignant glioma

   Author : Pär Salander; Roger Henriksson; Ullabeth Sätterlund Larsson; Umeå universitet; []
   Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; astrocytoma; communication; coping; defence mechanism; denial; glioma; hope; memory; neuropsychology; quality of life; spouse;

   Abstract : This thesis deals with psychological issues concerning patients with malignant gliomas, and their spouses. There is no known medical cure, and the patients have a limited survival expectancy. Therefore studies evaluating new treatment modes, an overall supportive atmosphere, and attempts to avoid imposing unnessesary strain are necessary. READ MORE

6. 4. Biological and Molecular Characteristics of Microorganism-Stimulated Defence Response in Lycopersicon esculentum –L

   Author : Idress H. Attitalla; Siv Andersson; Sture Brishammar; Sadik Tuzun; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Biology; Phytophthora cryptogea; Fusarium oxysporum strain IMI 386351; Pseudomonas sp. strain MF30; plant defence; phylogenetic analysis; differentiation methods; Biologi; Biology; Biologi;

   Abstract : Microorganisms, including two fungi, Phytophthora cryptogea and Fusarium oxysporum strain Fo-(IMI 386351), and one bacterium, Pesudomonas sp. strain MF30, were tested for their abilities to stimulate plant defence responses in tomato (Lycopersicon esculentum –L.) and to serve as effective biocontrol agents (Bs). READ MORE

7. 5. Defence on Demand : A physiological perspective on phenotypic plasticity in anti-predator traits

   Author : Jerker Vinterstare; Enhet akvatisk ekologi; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Phenotypic plasticity; inducible defences; stress physiology; cortisol; immune function; trade-offs; sexual dimorphism; crucian carp; visual ecology; predator-prey interactions; POMC pro-opiomelanocortin ; colour change; eco-immunology; Anti-predator defences; Inducible morphological defence; Phenotypic plasticity; Stress physiology; Cortisol; Immune function; Crucian carp; Predator-prey interactions; Trade-offs; Sexual dimorphism; POMC; Pro-opiomelanocortin; Visual ecology; Eye evolution; Melanin; Eco-immunology; Pace-of-life; Behavioural plasticity;

   Abstract : Almost all species face some degree of predation risk, and, hence, evolution has produced a plethora of anti-predator defences. However, anti-predator strategies require resources, and the prevailing risk of becoming prey is influenced by many factors and rarely constant across time and space. READ MORE