You've isolated an unknown substance from the developing seed. When this substance is placed on the top of a decapitated oat coleoptile, the coleoptile elongates. Explain why apples should not be stored near bananas. Name the hormone used in lab that delayed senescence of wheat leaves. Seed dormancy may be caused by impermeable seed coat, lack of a growth promoter or the presence of an inhibitor.
Dormancy is initiated only after the onset of unfavorable seasonal growing condition.
Dormancy is broken by various environmental factors such as period of cold temperatures, presence of significant amounts of rainfall over a period of time, or by damage to the seed coat. In addition to the breaking of seed dormancy, environmental conditions must be favorable before a seed will germinate. List three different things that occur as a part of fruit ripening. Gai mutation in Arabidopsis results in a dwarf phenotype like that of Little Marvel peas. However, unlike the Little Marvels, elongation of the internodes does not occur when the Gai mutants are sprayed with gibberellin.