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plant hormones

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plant hormones

Postby andyshinnn » Fri Apr 16, 2010 7:59 pm

1. Plant growth is regulated by the _____ influence of hormones.
Hormones are chemical substances produced __________ __________ ___________.
Horomones are produced in certain parts of the plant and then _____________ to other parts where they influence __________,
_____________ and _____________ of cells.
2. Three types of plant hormones are auxins, gibberellins, and cytokinins.
Auxins: Function--______________________________

Experiments demonstrating auxin action--(Describe them)
a.

b.

c.

d.

commerical use of auxin--
________________________

gibberllins: function-- __________________________
discovery: ______________________________

cytokinens: functions: ___________________________

3. describe the role of auxin in controlling phototropic responses.


4. describe the role of auxin in controlling geotropic responses
Last edited by JackBean on Fri Apr 16, 2010 8:14 pm, edited 1 time in total.
Reason: use more specific subject next time!
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Postby JackBean » Fri Apr 16, 2010 8:12 pm

1. Plant growth is regulated by the influence of hormones.
Hormones are chemical substances produced by enzymes.
Hormones are produced in certain parts of the plant and then translocated to other parts where they influence particular processes.

2. there are plenty more types of hormones
Fritz Went's experiment, when he decapited plant and put the coleoptile on agar block. After putting this block on decapited plant he promoted the growth
decapite auxine and you will release auxiliary buds from dormance

CKs function: regulation of growth and induction of cell division, delay of senescence, release of auxilary buds from dormancy, progression through cell cycle, differentiation of vascular bundles and of chloroplasts

3. & 4. the function is pretty the same, although at different places. Auxins induce elongation of the cells, so that the plants grows in correct orientation
http://www.biolib.cz/en/main/

Cis or trans? That's what matters.
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