abscission

Example Sentences

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The tree produces less of a chemical called auxin, and that drop in auxin contributes to a weakening of tissue at the leaf stem’s base, creating what’s known as an abscission layer.

From Slate • Dec. 5, 2023

The leaves that aren’t dropped from a tree, though, don’t develop abscission layers at all.

From Slate • Dec. 5, 2023

“The restriction of ethylene’s destructive effects only to cells in the abscission zone illustrates the precise control plants exercise over their hormone systems,” Capon wrote.

From Seattle Times • Dec. 2, 2022

However, more recent studies indicate that ABA plays only a minor role in the abscission process.

From Textbooks • Jun. 9, 2022

On some trees, the petioles of last year's leaves were still attached to the dead twigs late the following summer, showing that the freeze occurred before the abscission layers had formed.

From Northern Nut Growers Association Incorporated 39th Annual Report at Norris, Tenn. September 13-15 1948 by Northern Nut Growers Association