describe the role of gibberellin in the germination of barley (see 16.3.4)
describe the role of abscisic acid in the closure of stomata during times of water stress, including the role of calcium ions as a second messenger
describe the role of gibberellin in the germination of barley (see 16.3.4)
describe the role of abscisic acid in the closure of stomata during times of water stress, including the role of calcium ions as a second messenger