Leaf Mosaic

Leaf Mosaic

 

the distribution of leaves of plants in a single plane, usually perpendicular to light rays, which provides the least shading of leaves by one another. Leaf mosaic is caused by the unequal growth of petioles and leaf blades that are drawn to light and fill every space exposed to the sun’s rays. As a result, the size and even the shape of leaves are altered. Leaf mosaic may be observed on the horizontal and, more rarely, on the vertical branches of trees and shrubs under conditions of considerable shade (the lower branches of the crowns of elm, linden, and maple trees), on the stolons of herbs (asarum), and on rosette shoots (geranium, plantago, dandelion). Leaf mosaic is an important adaptation which makes maximum use of dispersed light and can be formed with any type of leaf arrangement—spiral, opposite, or verticillate.

References in periodicals archive ?
In Gepak Kuning and Wilis varieties, infection with SMV manifested as leaf mosaic, which progressed to leaf wrinkling.
Or for the wow factor, silver and black leaf mosaic glass tiles are down from PS87.
The master bedroom's en suite includes a feature wall of Bisazza 22 carat white gold leaf mosaic, and the kitchen boasts bespoke units in gloss black and walnut, while the staircase is created from American black walnut with illuminated bronzed glass balustrading.
Symptoms of infection by SMV strains on soybean plants include leaf mosaic (light and dark green areas, chlorosis, leaf rugosity, and leaf curl) and necrosis (necrotic lesions, veinal necrosis, stem browning, and STN).
Depending on the virus inoculated, susceptible reactions included leaf mosaic and distortion, stunting and bud necrosis.