lehtierin
Lehtierin is a term of Finnish origin that translates to "leaf separation" or "leaf fall." It refers to the natural process by which deciduous trees and shrubs shed their leaves, typically in autumn. This phenomenon is a crucial adaptation for plants in temperate and colder climates, allowing them to conserve water and energy during the winter months when sunlight is scarce and temperatures are low.
The process of lehtierin is triggered by changes in environmental conditions, primarily the decrease in daylight
Once the abscission layer is sufficiently formed, the leaf detaches from the tree, falling to the ground.