Plant Structures Exam 3

Stamens & pistils mature at different times

Responses requiring a very low amount of light, ex: a few seconds of starlight

The failure of newly-dispersed mature seeds to germinate under normal growth conditions

Undergo meiosis to produce haploid microspores

Signal to receptor to signal transduction to response

Divide and differentiate to form pollen grains

Molecule that attaches to and activates a receptor

The process of transferring pollen grains from the anther of the stamen (male organ of the flower) to the stigma of the pistil (female organ of the flower)

620-700 nanometers

light requirement for germination, phytochromes involved, coat imposed dormancy within all light-regulated seeds

Outer protective layer

Modify and regulate phosphorylation of phytochromes

Light absorbing pteridine derivatives often found in pigmented cells

Controls VLFRs and far-red light-induced HIRs, rapidly degraded as Pfr by the ubiquitin pathway

Seed dormancy that is caused directly by the embryo and isn't due to any influence of the seed coat or surrounding tissues, typically induced by abscisic acid (ABA) at the end of embryogenesis

Single leaf in cereal grain seeds

Small molecules or ions made quickly and mobilized fast

Male gametophyte, begins with microsporogenesis (anther cells divide to form diploid pollen mother cells, (microsporocytes))

Flavin Adenine Dinucleotide (FAD); Pterin 5,10-methyltetrahydrofolate are examples of these

The physiological state in which far red light will not act to reverse events induced by red light interactions