Plant Hormones and Responses

These flashcards cover key concepts related to plant hormones, their functions, and how plants respond to environmental signals.

Abscisic Acid

A plant hormone that protects plants in poor growth conditions such as cold, drought, and salinity.

Dormancy

A state in which plant tissues do not grow or develop, primarily promoted by abscisic acid.

Stomata

Small openings in leaves that regulate gas exchange and transpiration; abscisic acid signals to close them in dry conditions.

Salicylic Acid

A plant hormone that signals defense against herbivores and pathogens, and has anti-aging effects.

Aspirin

A compound derived from salicylic acid, used to relieve pain and inflammation.

Jasmonic Acid

A plant hormone similar to prostaglandins that signals defense responses against herbivores and pathogens.

Cryptochromes

Light-sensitive proteins in plants and humans that help measure light and influence various physiological processes.

Phytochromes

Pigment-protein complexes in plants that absorb light and play a key role in growth and development responses to light.

Gravotropism

A plant's growth movement in response to gravity, allowing roots to grow downward and stems to grow upward.

Abiotic Signals

External physical signals such as light, temperature, pressure, and gravity that affect plant behavior.