The unselected production of ethylene does not comes under plant responses to herbivory.
Explanation:
The plants are protected against herbivores by hard shells, thorns and spines. The spines on cactus plants are modified leaves that act as a mechanical defense against predators.
Antinutritive defenses are chemical, toxins, defensive proteins, enzymes, and deposits that can flow to repel or physically trap small organisms.
The plants main predators are the animals that feed o them. To keep the animals away from them the plants have fine hairs on the surface of their leaves.
Ethylene inhibits the growth in plants. There are five types of plant hormones. they are Auxin, gibberllins, cytokininins Abcisic acid promotes plant growth.
