Plant Hormones - Auxin Flashcards
What cell division occurs in the tip of plant shoots
mitosis
What plant growth regulators are found in the tip of the stem
Auxins
What does auxin promote in the cells
elongation
When light is equal how does the tip grow
equally straight up
What happens to the shoot when light grows one sided
the shaded side grows more because more auxin on shaded side
In the shoots what side does more auxin go to when light is one sided
more on the shaded side so it bends more towards light since the shaded side is longer
What term is given to how plants respond to external stimulus
TROPISMS
What is response to light called
Phototropism
What is response to gravity called
gravitropism
IN the roots what tropisms is there
(positively…
negatively…)
Positively gravitropic
negatively phototropic
What do the tropisms in roots ensure
it grows downwards
In the shoots what tropisms are there
(positively…
negatively…)
positively phototropic
negatively gravitropic
What do the tropisms in the shoots ensure
it grows upwards
WHAT DOES AUXIN DO DIFFERENTLY IN ROOTS
INHIBITS Cell elongation
If a root is growing parallel to the ground where does most auxin go and what does it cause
Auxin is in the lower part of the root and it elongates less
therefore creates a bend downwards and equals out auxin
