منابع مشابه
Plant Phototropic Growth
Plants are photoautotrophic sessile organisms that use environmental cues to optimize multiple facets of growth and development. A classic example is phototropism - in shoots this is typically positive, leading to growth towards the light, while roots frequently show negative phototropism triggering growth away from the light. Shoot phototropism optimizes light capture of leaves in low light en...
متن کاملDifferential Growth and Phototropic Bending in Phycomyces
Using present knowledge of the cell's optical and growth mechanisms, a theoretical bending speed of about 5 degrees min.(-1) is calculated for unilateral irradiation by a single beam of normally incident visible light; this figure is of the magnitude found experimentally. Between beams of light opposed at 180 degrees , the resultant bending speed is given by the difference-to-sum ratio of the l...
متن کاملPhototropic growth in a reef flat acroporid branching coral species.
Many terrestrial plants form complex morphological structures and will alter these growth patterns in response to light direction. Similarly reef building corals have high morphological variation across coral families, with many species also displaying phenotypic plasticity across environmental gradients. In particular, the colony geometry in branching corals is altered by the frequency, locati...
متن کاملPhototropic Curvature in Phycomyces
The distribution of curvature and of bending speed along the cell's growing region are studied during steady state phototropic bending. At the start, elemental bending speed parallels the known axial distribution of growth rate. Hence regional phototropic sensitivity is initially determined by the local growth rate, and unilateral visible light acts proportionally at all levels of the growth zo...
متن کاملThe Phototropic Excitation of Limax
The photic orientation of Limax creeping geotropically upon a vertical plate is such that the phototropic vector determining the angular deflection beta from the vertical path is proportional to log I. This is proved by the fact that with horizontal illumination tan beta is directly proportional to log I; with non-horizontal light rays from a small source the ratio See PDF for Equation is direc...
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ژورنال
عنوان ژورنال: Current Biology
سال: 2015
ISSN: 0960-9822
DOI: 10.1016/j.cub.2015.03.020