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Plant Structures Exam 3

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Last updated: April 15, 2025
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First submittedApril 15, 2025
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Divide and differentiate to form pollen grains
Microspores
Plants requiring an absolute requirement for a specific set of environmental cues in order to flower
Obligate/qualitative regulation
Study of how plants obtain and use mineral nutrients
Mineral nutrition
The physiological state in which far red light will not act to reverse events induced by red light interactions
Escape from photo reversibility
The dispersal units containing the mature embryos of angiosperms and gymnosperms
Seeds
Regulates LFRs like photo reversible seed germination, crucial role in response to shade
phyB
Light-oxygen-voltage domains, highly conserved protein domains that respond to light, oxygen, or voltage charges to change the receptor protein confirmation
Phototropins
Process where, during pollination, pollen grain has a certain set of S-genes, if pistil has the same set of S-genes, pollen tube is aborted, creates a biochemical barrier that prevents self-pollination
Self-incompatibility
Berries contain at least one fertilized seed that is subsequently aborted, leaving a small & soft undeveloped seed trace
Stenospermocarpy
Proteins that sense the presence of light and initiate a response via a signaling pathway, include phytochromes, cryptochromes, phytotropins, and Zeit Lupe, include protein and a chromophore
Photoreceptors
The ratio of ABA and gibberellin serving as a primary determinant of seed dormancy and germination
Hormone Balance Theory
Light absorbing pteridine derivatives often found in pigmented cells
Pterin5,10-methyltetrahydrofolate
Vegetative growth without the ability for reproduction
Juvenile phase
A riboflavin-containing cofactor that undergoes a reversible two-electron reduction to produce FADH2
Flavin Adenine Dinuleotide
Previously characterized MYB gene required for carotenoid pigmentation in nectar guides
Reduced Carotenoid Pigmentation 1 locus
Controls VLFRs and far-red light-induced HIRs, rapidly degraded as Pfr by the ubiquitin pathway
phyA
Baby plants
embryos
The ability of an organism to detect day length to ensure that events occur at the appropriate time of year, thus allowing for seasonal response
Photoperiodism
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)
Pollination
710-850 nanometers
Far red light
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