Plant Hormones Overview

A plant hormone that plays a key role in regulating fruit ripening, causing the familiar process of fruit softening and color changes.

A plant hormone involved in promoting stem elongation and breaking dormancy in seeds. It helps plants grow taller.

A plant hormone that triggers defense responses against various stresses, including insects and pathogens.

The process where plant parts like leaves, fruits, and flowers detach from the organism.

A specialized zone at the base of a petiole (leaf stalk) where abscission occurs.

The layer within the abscission zone where cell separation actually happens during abscission.

A layer protecting the plant after abscission, often visible as a scar.

A plant hormone that counteracts the effects of ethylene, delaying leaf drop.

The bending or drooping of plant parts, often caused by uneven growth due to factors like waterlogging.

A process that uses the ripening of avocados to measure ethylene concentration in the air.

Hormones involved in plant growth, defense, and stress responses. These include brassinosteroids, jasmonic acid, and salicylic acid.

Steroid hormones found in plants, known to promote growth and development. Discovered in Brassica rapa pollen.

A type of experiment that helps determine the individual role of brassinosteroids in plant growth. Involves using plants with mutations that affect auxin production.

A natural process where plants break down and die.

A process that removes excess fruit from a plant to improve the quality and size of the remaining fruit.

One of the two active forms of brassinosteroids, known for its role in promoting cell division and elongation.

A major signaling pathway in plant defense responses, activated by stress and leading to the synthesis of jasmonic acid.

A protein synthesized in plant leaves that can signal to other parts of the plant after being triggered by insect herbivory.

A process where plants communicate with each other to coordinate their defenses against insect herbivory.

A type of defense mechanism employed by some plants in response to insect herbivory, where they produce inhibitors to disrupt the insects' digestive system.

A specific type of defense mechanism employed by plants where they produce proteins that bind to carbohydrates in the digestive tract of insects, interrupting nutrient absorption.

A biological process that involves a wave of electrical signals traveling throughout the plant in response to damage caused by insects or other stressors.