GROWTH AND DEVELOPMENT IN PLANTS Flashcards
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| 2449619956 | control plant movements | Hormones | 0 | |
| 2449623225 | target | usually organic cpds, produced by one part of the plant and effect a different part of the plant | 1 | |
| 2449628672 | they are chemical messengers | hormones | 2 | |
| 2449632565 | auxin, cytokines, gibberellins | Growth Promoters | 3 | |
| 2449637227 | - most are Indoeacetic acid (IAA) - produced in apical meristem - promotes elongation of young developing shoots | auxin | 4 | |
| 2449640913 | - produces phototropisms - migrate down to lateral bud and prevents them from growing - increase in vascular cambium | auxin | 5 | |
| 2449640914 | phototropisms | plant grows towards the light | 6 | |
| 2449642298 | _____ ends up on dark side and soften cells - allows them to elongate | auxin | 7 | |
| 2449646052 | - produced in seeds -promote development of fruit - can be sprayed to prevent leaf and fruit from dropping | auxin | 8 | |
| 2449647825 | - response of stems to gravity - Herbicides | auxin | 9 | |
| 2449647826 | cause plant to grow to death | Herbicides | 10 | |
| 2449650942 | ex. 2-4D (roundup): works best on grasses (monocots) Dioxin - behaves like auxin | Herbicides | 11 | |
| 2449655550 | - modified forms of adenine that stimulate cytokinesis | cytokines | 12 | |
| 2449656724 | - stimulate RNA and Protein synthesis - move from the roots to target tissue by moving up in the xylem sap | cytokines | 13 | |
| 2449660295 | - stimulate axillary bud growth (Auxin can't suppress axillary bud growth once it has begun) | cytokines | 14 | |
| 2449661610 | Lower buds thus grow before higher ones since they are closer to the cytokines source than the auxin source | cytokines | 15 | |
| 2449664465 | - more cytokines than auxin | cause shoot buds to develop | 16 | |
| 2449669440 | - more auxin than cytokines | cause roots to form | 17 | |
| 2449674492 | (70 different kinds) | Gibberellins | 18 | |
| 2449676745 | - produce primarily in roots and young leaves - stimulates growth in leaves and stems | Gibberellins | 19 | |
| 2449678432 | - stimulates cell elongation and division in stems | Gibberellins | 20 | |
| 2449680913 | - cause bolting - controls fruit development along with auxin | Gibberellins | 21 | |
| 2449680914 | - when released - signals seeds to break dormancy and germinate | Gibberellins | 22 | |
| 2449682379 | bolting | rapid growth of floral parts of a plant | 23 | |
| 2449685637 | 2 kinds of Growth Inhibitors | Abscisic acid (ABA) Ethylene | 24 | |
| 2449686747 | - helps prepare plants for winter by suspending both primary and secondary growth | Abscisic acid (ABA) | 25 | |
| 2449689641 | - inhibits cell division in vascular cambium - acts in closing stomata in times of water stress | Abscisic acid (ABA) | 26 | |
| 2449692829 | - a gaseous hormone that diffuses through air spaces between plant cells | Ethylene | 27 | |
| 2449692830 | - causes fruit to ripen and leaf abscission - released at wound sites | Ethylene | 28 | |
| 2449696513 | abscission | leaves fall off | 29 | |
| 2449697812 | growth responses that result in curvatures of the whole plant organs toward or away from a directional stimulus | Tropisms | 30 | |
| 2449700719 | (Tropisms) Directional: | coming from one direction instead of several | 31 | |
| 2449703340 | 3 Primary Stimuli which result in Tropisms: | Phototropism Geotropism Thigmotropism | 32 | |
| 2449704725 | grows toward the sun | Phototropism | 33 | |
| 2449705713 | roots grow down, stems/floral parts grow up | Geotropism (Gravitropism) | 34 | |
| 2449710159 | (+) geotropism | Roots | 35 | |
| 2449710160 | (-) geotropism | Shoots | 36 | |
| 2449712123 | directional growth in response to touch | Thigmotropism | 37 | |
| 2449714704 | Nastic movements | Turgor Movements | 38 | |
| 2449716050 | independent of direction of stimulus | Turgor Movements | 39 | |
| 2449717178 | reversible movements caused by changes in turgor pressure of specialized cells in response to stimuli | Turgor Movements | 40 | |
| 2449718320 | (Turgor Movements) Pulvini | reversible movements caused by changes in turgor pressure of specialized cells in response to stimuli | 41 | |
| 2449720910 | (Turgor Movements) Seismonastic | movements due to touch, shaking, thermal stimulation | 42 | |
| 2449723335 | ex. Mimosa, Venus's Fly-trap | (Turgor Movements) Seismonastic | 43 | |
| 2449725057 | movement of leaves to a vertical position in evening and lowering of leaves to a horizontal position in morning | Sleep movements | 44 | |
| 2449727215 | Sleep movements | (Turgor Movements) | 45 | |
| 2449732064 | a physiological cycle with a frequency of about 24 hrs that persists even when an organism is sheltered from environmental cues | Circadian Rhythms | 46 | |
| 2449733961 | synchronized with the earth's light dark cycle | Circadian Rhythms | 47 | |
| 2449734984 | -physiological response to day length -Critical Night Length | Photoperiodism | 48 | |
| 2449737027 | controls flowering and other responses to photoperiod | -Critical Night Length | 49 |