Plant Hormones

Front 1

Auxin

Back 1

Stimulates cell elongation; involved in phototropism (growth toward or away sunlight) , gravitropism (growth in response to sunlight), apical dominance (central stem stronger than lateral branches) , and vascular differentiation; inhibits abscission prior to formation of abscission layer ; stimulates ethylene synthesis' stimulates fruit development' induces adventitious roots on cuttings

Hint 1

embryo of seed, young leaves, meristems of apical buds

Front 2

Cytokinin

Back 2

Stimulates cell division, reverse apical dominance, involved in shoot growth, delay leaf sequence

Hint 2

synthesized in roots and transported to other organs

Front 3

Ethylene

Back 3

Stimulates fruit ripening, leaf and flower senescence (aging), and abscission (seperation of flower root and leaves)

Hint 3

Tissues of ripening fruits, nodes of stems, senescent leaves and flowers

Front 4

Abscisic Acid

Back 4

Stimulates stomatal closure

Hint 4

Leaves, stems, green fruit

Front 5

Gibberellin

Back 5

Stimulates shoot elongation, stimulates bolting and flowering in biennials, regulates production of hydrolytic enzymes in grains

Hint 5

Meristems of apical buds and roots, young leaves, embryo