Why Do Leaves Change Colour?
Leaves change colour as deciduous trees prepare for winter. Shorter days help trigger senescence, chlorophyll is dismantled and nutrients are recovered. Yellow and orange…
Oct 1, 2026 • 13 min readExplore plants, from growth and reproduction to the ways they respond to their surroundings and interact with other organisms.

Trees move most water upward through xylem using cohesion–tension. Water evaporating from leaves lowers pressure in the xylem. Cohesion between water molecules transmits that pull down continuous columns toward roots, while adhesion and narrow…
Oct 6, 2026 • 12 min readRead the discovery →New stories, explanations and research from Plant Life.
Leaves change colour as deciduous trees prepare for winter. Shorter days help trigger senescence, chlorophyll is dismantled and nutrients are recovered. Yellow and orange…
Oct 1, 2026 • 13 min read
Leaves change colour as deciduous trees prepare for winter. Shorter days help trigger senescence, chlorophyll production stops and green pigment breaks down, revealing yellow…
Sep 25, 2026 • 13 min read
Leaves change colour as deciduous trees prepare for winter. Shorter days help trigger senescence, chlorophyll is dismantled and nutrients are recovered. Yellow and orange…
Oct 1, 2026 • 13 min read
Leaves change colour as deciduous trees prepare for winter. Shorter days help trigger senescence, chlorophyll production stops and green pigment breaks down, revealing yellow…
Sep 25, 2026 • 13 min readOne remarkable idea at a time—nature, science, history and beyond.