Hyphal elongation

Root products, as defined by Uren and Reisenauer (17), represent a wide range of compounds. Only secretions are deemed to have a direct and immediate functional role in the rhizosphere. Carbon dioxide, although labeled an excretion, may play a role in rhizosphere processes such as hyphal elongation of vesicular-arbuscular mycorrhiza (39). Also, root-derived CO2 may have an effect on nonphotosynthetic fixation of CO2 by roots subject to P deficiency and thus contribute to exudation of large amounts of citrate and malate, as observed in white lupins (40). The amounts utilized are very small and, in any case, are extremely difficult to distinguish from endogenous CO2 derived from soil and rhizosphere respiration. 

C. albicans CaRSRl required for polar bud site selection in yeast form, germ tube emergence during mycelial transition and hyphal elongation. 145... 

Fig. 6. Scanning electron micrographs of the different stages of the interaction between Trichoderma harzianum and nylon fibers coated with purified ScleroUum rolfsii lectin. (A) A typical branching of the Trichoderma towards the fibers and contact of the branch tip with the fiber surface (bar=10pm) (B) subsequent elongation of the firmly attached tip along the fiber surface (bar= I pm) (C) Trichoderma hyphae coiled fibre, producing additional branches. The hyphal coils and branches adhere tightly to the fiber surface (bar = 10 pm). (From ref. [132], by permission from publisher.)...

Microscopic Characteristics Particles typically ovoid to polyhedral, measuring 25 or 34 nanometers. Elongated particles measure 19-50 nanometers. Virus particles dwell within hyphal cells or... 

Plant defense Papilionoideae Isoflavonoid phytoalexins (e.g., pterocarpans, isoflavans) Antifungal activity (inhibit spore germination, germ tube elongation, hyphal growth, etc.)... 

---