Chap 39 AP Bio

138419146	hormone	compound produced by one part of an organism that is transported and triggers a response in another part
138419147	abscisic acid	produced in terminal bud, prepares plant for winter; closes stomata, inhibits growth
138419148	oligosaccharins	plant defense against pathogens, cell growth and differentiation, flower development
138419149	photoperiodism	detect time of year by the photoperiod, physiological response to night length, effects seasonal events such as flowering and seed germination
138419150	phytochrome	Protein containing a chromophore responsible for a plant's response to the photoperiod
138419151	turgor movements	Reversible movements caused by changes in turgor pressure
138419152	phototropism	stimulus is light
138419153	ethylene	gas, ripens fruit, leaf abscission, stimulus is shortening days/longer nights and cooler temps. (to a degree)
138419154	sleep movements	lowering of leaves to vertical position in evening, raising leaves to a horizontal position in the morning, one side of plant is turgid while the other is flaccid
138419155	short-day plants	night is longer than a critical length, flower in late summer, fall
138419156	phytoalexins	*A class of compounds with antibiotic properties that are naturally produced by some plants to fight infections from fungus
138419157	hypersensitive response	chemical signaling system to resist infection
138419158	auxin	main site of production is the apical meristem, increases plasticity of cell wall, promotes elongation of shoots, promotes formation of adventitious roots & fruit growth
138419159	senescence	*the organic process of growing older and showing the effects of increasing age
138419160	circadian rhythms	24-hour cycle, does not require environmental cues, light-dark cycle, entrained from environment; internally set
138419161	long day plants	night is shorter than a critical length, flower in late spring, summer
138419162	gene-for-gene recognition	Resistance to a disease depends on a precise match up between an allele in a plant and an allele in the pathogen
138419163	cytokinins	anti-aging, stimulates cell division, activates proteins for mitosis, stimulates axillary bud growth
138419164	tropism	Growth responses that result in curvatures of the whole plant toward/away from a stimulus
138419165	gibberellin	Primarily produced in roots and young leaves, imbibition triggers its release, promotes internode elongation (stem elongation), promotes seed germination (breaks dormancy), places a role in fruit growth
138419166	gravitropism	stimulus is gravity Positive -downward (roots) Negative -upward (shoots)
138419167	day-neutral plants	unaffected by photoperiod, triggered by maturity
138419168	thigmotropism	stimulus is touch
138419169	stress	An environmental condition that can have an adverse effect on a plant's growth, reproduction, & survival