Inhaltsangabe1 Environmental Signal Processing and Adaptation.- 1.1 Introduction.- 1.2 Acclimation and Adaptation.- 1.3 Biological and Physical Signals for Plants.- 1.4 Symbiontic Signal Exchange.- 1.5 Light Adaptation in Plants.- 1.6 Thioredoxins.- 1.7 Vibratory Signal Processing in Insects.- 1.8 Seasonal Acclimation in Small Mammals.- 1.9 Signal Processing.- 1.10 References.- 2 Communication and Efficiency in the Symbiotic Signal Exchange.- 2.1 Introduction.- 2.2 Flavonoids and Isoflavonoids as Signal Molecules from Host Plants.- 2.3 Nod Factors as Signal Molecules from Rhizobium, Bradyrhizobium, Sinorhizobium and Mesorhizobium.- 2.4 Communication and Signal Exchange Between Host Plants and Symbionts: a Summary.- 2.5 Induction of Early nod Genes in the Plants by Inoculation with Rhizobia/Bradyrhizobia.- 2.6 Symbiosis Specific Differentiation of Free-Living Rhizobium/Bradyrhizobium Cells to Bacteroids.- 2.7 Nodule Compartmentation and Induction of Late Nodulines During Nodule Development.- 2.8 Essential Functions of Late Nodulins for Nodule Metabolism.- 2.9 Signal Molecules for the Induction of Late Nodulins.- 2.10 Signals and the Regulation of Nodule Senescence.- 2.11 N2-Fixation and Denitrification Under Field Conditions.- 2.12 References.- 3 Rhizosphere Signals and Ecochemistry.- 3.1 Introduction.- 3.2 The Nature of Rhizosphere Signals.- 3.2.1 Plant Signal Molecules.- 3.2.2 Bacterial Signals to Plants.- 3.2.3 Antibiotics.- 3.3 New Concepts in Rhizosphere Signals.- 3.3.1 Biotin.- 3.3.2 Respiratory Elicitors.- 3.3.3 Nucleosides.- 3.4 Integration of Signals into Rhizosphere Communities.- 3.4.1 Positional Effects.- 3.4.2 Environmental Effects.- 3.4.3 Inactivation of Signals.- 3.5 Summary.- 3.6 References.- 4 Endomycorrhizas in the Gentianales: Structures and Evolution of the Vesicular-Arbuscular Mycorrhiza (VAM).- 4.1 Introduction.- 4.2 Classification of the Gentianales.- 4.3 Root System, Roots, and Mycorrhizal Structures in the Gentianales.- 4.3.1 Root Infection by VAM Fungi.- 4.3.2 Colonization of the Root Cortex.- 4.4 Paris Type: Structural Incompatibility of the Arum Type.- 4.5 VAM Structures as a Characteristic for Systematics.- 4.6 The Advanced Paris Type Represents a Progressive Evolutionary Step in VAM.- 4.7 Summary.- 4.8 References.- 5 Light Adaptation of the Photosynthetic Apparatus of Green Algae.- 5.1 Introduction.- 5.2 Changes in the Photosynthetic Apparatus During Adaptation to Different Light Intensities and Wavelengths.- 5.3 Adaptation Phenomena of Other Green Algae and of Aquatic Higher Plants.- 5.4 Carotenoids and Photosynthetic Adaptation.- 5.5 Regulation of the cab-Gene Expression by Light of Different Intensities and Wavelengths.- 5.6 Photoreceptors.- 5.7 Photoprotection by Nonphotochemical Chlorophyll Fluorescence Quenching.- 5.8 Adaptation of the Photosynthetic Apparatus of Cyanobacteria to Light Intensity and CO2 Concentration.- 5.9 References.- 6 Light-Harvesting Systems in the Photosynthetic Apparatus of Cyanobacteria, Red Algae and Cryptophytes.- 6.1 Introduction.- 6.2 Light Harvesting in the Photosynthetic Apparatus of Cyanobacteria and Red Algae.- 6.2.1 Structure of Hemidiskoidal and Hemiellipsoidal Phycobilisomes.- 6.2.2 Chromophores and Excitation Energy Transfer.- 6.2.3 Phycobilisomes as Dynamic Structures.- 6.3 Light Harvesting in the Chloroplasts of Cryptophytes.- 6.3.1 Origin of Genetic Complexity in Cryptophytes.- 6.3.2 Phycobiliprotein Antennae in Cryptophytes.- 6.3.3 Cooperation of Two Antennae Systems in Cryptophytes.- 6.4 References.- 7 Thioredoxins: Adapting Plant Metabolism to Light and Other Environmental Signals.- 7.1 Introduction.- 7.2 Complete thioredoxin profiles in plant cells.- 7.3 Thioredoxin-Dependent Enzymes.- 7.4 The Signaling Mechanism and its Physiological Logic.- 7.5 Environmental Disturbance of Thioredoxin Action.- 7.6 Experimentation Pitfalls in Vitro.- 7.7 Thioredoxin Control of Plant Metabolism: A Unified View.- 7.8 References.- 8 Photoinhibition in Seaweeds.- 8.1 Introduction.- 8