October 5, 2010, Ronald Naccarella
The decrease in hours clarity and lower temperatures of the season autumn are informing the trees it is time to prepare for their winter hibernation. In this process of "winterizing", they will be pouring countless billions of leaves;in our region, here at the western border of New England, this leaves bloodshed is preceded by a show of color more spectaculaire.Cet fantastic display of color is the result of the transformation of chemical pigments in leaves themselves.
Leaves appear generally green of chlorophyll, responsible for substance for the photosynthesis, which is what we call the transformation of light from the Sun, carbon dioxide and water into sugars work. This action is the basis of all life on Earth.Chlorophyll absorbs red light and blue light from the Sun, causing the leaves appears green to our yeux.Un another chemical pigment commonly found in the leaves is carotene, which absorbs the light blue-green and blue, showing yellow in our vision. Together, these two chemicals are responsible for the green color that we see on the leaves in spring and summer.
During the spring and summer, the leaves of the trees produce feverishly sugar from carbon dioxide and water by means of light on the chlorophyll. Flow of water and nutrients of roots, through the branches and leaves. Sugars produced by photosynthesis stem leaves in other parts of the tree, where a part of the chemical energy is used for growth, and some is stored.
Shortening days and cool nights autumn trigger Corky membrane between management and the stem leaf growth.This membrane interferes with the movement of nutrients in the reason for this interruption feuille.En, decreases the production of chlorophyll in the spreadsheet and green leaf colour fades. If the worksheet contains carotene, like leaves to many species, happens to bright yellow green as the chlorophyll disappears. In some trees, such as the concentration of sugar in leaves, increases sugar reacts to form anthocyanins. These pigments are causing the yellowing leaves turn red.
Variations in the extent and intensity of the fall colors are heavily influenced by weather conditions.Low temperatures destroys the chlorophyll and whether they will remain above freezing, promote the formation of anthocyanins.Sunshine also destroyed the chlorophyll increases anthocyanin dry .Temps, by increasing the concentration of sugar production in SAP, also increases the amount of pigment.If the brightest of the fall colors are generated during dry sunny days are followed by fresh and dry nights.
So the science.Maintenant you can go back to simply enjoy the beauty of image nature show, but with the advantage to be able to say to your child why leaves turn to color if and when they ask you 40 times, as they will be probablement.Avoir a good week end!
Copyright Ronald Naccarella.Contacter the author for permission to republish.
Autumn - leaves bing$ (function () {$(".imageCarousel") .jCarouselLite ({btnNext: ".next", btnPrev: ".prev" visible: 1});}).
No comments:
Post a Comment