An organic compound in multicellular organisms that causes developmental or growth responses in target cells.
The first plant hormone discovered; produced in or near apical meristems suppresses the growth of axillary buds; stimulates growth of plant cells.
A method of growing a whole plant, plant organs, or plant tissues from cells in an artificial medium containing nutrients and hormones.
A hormone synthesized in roots that controls cell division and differentiation; counteracts apical dominance and delays aging of leaves
A gas that acts like a hormone, causing responses to mechanical stress and stimulating aging responses such as fruit ripening and leaf abscission.
A hormone that controls the opening and closing of stomata by causing water to enter or leave guard cells. Also establishes dormancy in seeds and other plant organs.
A plant that flowers when days are shorter than a critical length; actually flowers when night length is longer than a critical length.
Plant that flowers only when the day length is longer than a critical length. Actually flowers when the night length is shorter than the critical length.
Heliotropism; Describes flowers or leaves that either follow the sun or avoid the sun throughout the day
A growth response produced by a hormone that causes turning toward or away from an external stimulus.
A growth pattern in which an organism or tissue grows for a limited time, typical of animals and floral meristem.