Plant Hormone (Noun)
Meaning
(botany) a plant product that acts like a hormone.
Classification
Nouns denoting substances.
Examples
- Auxins are a class of plant hormone that play an important role in plant cell elongation, and therefore affect plant height and shape.
- Ethylene is often considered the aging hormone, and is produced in greater quantities as plant tissues begin to senesce, or age.
- The plant hormone cytokinin is produced by roots and transported to the leaves to promote cell division, leading to the formation of new tissues.
- Abscisic acid is a plant hormone that helps regulate stomatal closure during drought stress, allowing the plant to conserve water.
- Salicylic acid is a plant hormone that has an important role in signaling the plant's defense mechanisms and disease resistance.