PHOTOTROPISM OF THE Phycomyces SPORANGIOPHORE: A COMPARISON WITH HIGHER PLANTS

摘要: Abstract— The basic phenomena of Phycomyces phototropism are described and compared with those Avena Zea coleoptiles the seedlings Arabidopsis, Cucumis, Helianthus, Raphanus Sesamum. Symmetric redistribution growth rate during curvature, a feature characteristic phototropism, can in some cases also be found plants. Common features are: complex fiuence-response curves, log-linear fluence dependence phototropic latency, relatively slow bi-exponential dark-adaptation fast light-adaptation kinetics, action spectra indicating ubiquitous flavin-like photoreceptor(s) as well other non-flavin receptors, spacial memory indicated by reversal experiments. problem how curvature is maintained continuously while light-growth response adapts, remains unexplained (“phototropism paradox”). For it shown that most information processes, which include contrast recognition, wavelength sensitivity recovery (sensor adaptation) mediated photoreceptor systems.