Autumnleafcoloris a phenomenon that affects the normally greenleavesof many deciduous trees and shrubs by which they take on, during a few weeks in the autumn season, various shades of yellow, orange, red, purple, and brown. Whatcausesfallleavestochangecolor? Chlorophylls are a class of molecules with similar structures. Autumn meansleavesare turning different shades of red, orange, and yellow andfallingto the ground.
The shortened day length is the internal trigger thatcausesleavestochangecolor. When days become shorter and nights become longer, a process within the plantcausesthe cells around the base of theleaf, or petiole, to divide rapidly but not elongate. Leavesbegintochangetheircolors.Whatcausesfallleavestobe orange? Much like the orange carrots in your fridge, orangefallleavesarecausedby beta-carotene.
Which diminishes much slower than chlorophyll as the tree's go to sleep for the winter. WhyLeavesChangeColor.Leavescontain a green pigment called chlorophyll. Chlorophyll is instrumental in photosynthesis, the process in which energy from sunlight (along with water and carbon dioxide) is used to make sugars that feed the plant, leading to green foliage.
Did you ever wonder how and why afallleafchangescolor? Why a mapleleafturns bright red? Where do the yellows and oranges come from? To answer those questions, we first have to understand whatleavesare and what they do. Have you ever wondered how, or why theleaveson the trees starttochangefrom green to all sorts ofcolorsin thefall? And why do we call it “FallFoliage”? “Foliage” is just a fancy term meaning plant, orleavesfrom a tree. Other factors alsocauseleavestochangecolorearly or out of synch with their neighbors.
Trees on the edge of low-lying areas, where cooler air collects at night, often displaycolorssooner than trees in an upland forested setting. Trees that are diseased or in decline may also displayfall... Whatcausesleafcolortochangefrom green to yellow or red in thefall? It’s a combination of light, temperature and available water.
With less light on short days, trees and shrubs return to an energy-saving mode to survive the winter.
