Induced indirect defense in soybean and maize [Elektronische Ressource] : effects of ultraviolet radiation, nitrogen availability and heavy metal stress / vorgelegt von Thorsten Ralf Winter

Induced indirect defense in soybean and maize: Effects of ultraviolet radiation, nitrogen availability and heavy metal stress Dissertation zur Erlangung des naturwissenschaftlichen Doktorgrades der Julius-Maximilians-Universität Würzburg vorgelegt von Thorsten Ralf Winter aus Suhl Würzburg 2010 Eingereicht am: Mitglieder der Promotionskommission Vorsitzender: Prof. Dr. Thomas Dandekar Erstgutachter: Prof. Dr. Markus Riederer Zweitgutachter: Prof. Dr. Jürgen Tautz Tag des Promotionskolloquiums: Promotionsurkunde ausgehändigt am: Contents 1. Introduction 1 1.1. Induced indirect defense 1 1.2. Abiotic factors in general 4 1.3. Ultraviolet radiation 4 1.4. Nitrogen 5 1.5. Heavy metals 6 1.6. Study system 8 1.7. Hypotheses and Questions 9 2. Ambient ultraviolet radiation induces protective responses in soybean but does not attenuate indirect defense 11 2.1. Introduction 12 2.2. Materials and methods 13 2.3. Results 17 2.4. Discussion 25 2.5. Conclusions 27 3. Nitrogen deficiency affects bottom-up cascade without disrupting indirect plant defense 29 3.1. Introduction 30 3.2. Materials an methods 32 3.3. Results 36 3.4. Discussion 42 4. Heavy metal stress primes for herbivore induced volatiles without affecting induced indirect defense of maize 47 4.1. Introduction 48 4.2. Materials and methods 49 4.3.