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Phototropism

phototropism

(Science: botany) movement or growth of part of an organism (e.g. A plant shoot) towards (positive phototropism) a source of light, without overall movement of the whole organism. An orienting response to light.The directional [[growth of [[meristems in response to the presence of light and the direction it is coming from. Positive phototropism is a directional growth towards the light while a negative response is the organism moving away from the light.


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Re:

... reason here was the auxin and PIN proteins :) Damn, idk about PIN proteins yet , but could you explain auxin and how it effects it? and maybe phototropism and geotropism?

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by duherro
Mon May 07, 2012 1:01 pm
 
Forum: Botany Discussion
Topic: Plant hormone experiment!
Replies: 17
Views: 3174

Re: Why are leaves green?

... says light senceing molecules such as Phototropin (Blue light), Chryptochrome (Blue and UV-A) and Fitochrome (Red and far Red). Resposible for Phototropism, photomorfogenesis, circadian rhythm, sensitivity to IAA and stomata opening/closeing. The functioning of these molecules depend on the ...

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by cigarshaped
Wed Aug 31, 2011 4:29 pm
 
Forum: Botany Discussion
Topic: Why are leaves green?
Replies: 75
Views: 219779

Why are leaves green?

... look at light senceing molecules such as Phototropin (Blue light), Chryptochrome (Blue and UV-A) and Fitochrome (Red and far Red). Resposible for Phototropism, photomorfogenesis, circadian rhythm, sensitivity to IAA and stomata opening/closeing. The functioning of these molecules depend on the ...

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by Marnitz
Sat Jun 11, 2011 2:45 pm
 
Forum: Botany Discussion
Topic: Why are leaves green?
Replies: 75
Views: 219779

Confusing in Plant Movements

=> What is the difference b/w Phototactic, Phototropism and Photonasty? => Autonomic Movements: Spontaneous movements due to the internal stimuli but all its movements are external (e.g. Touch Me Not) then why it is categorized in Autonomic ...

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by angel786
Sun Oct 04, 2009 9:48 am
 
Forum: General Discussion
Topic: Confusing in Plant Movements
Replies: 0
Views: 616

Biology is not a science

... involving all the senses of higher animals. A response is often expressed by motion, for example, the leaves of a plant turning toward the sun (phototropism) and by chemotaxis. # Reproduction: The ability to produce new individual organisms either asexually, from a single parent organism, or ...

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by gamila
Sat Jun 06, 2009 3:48 pm
 
Forum: General Discussion
Topic: Biology is not a science
Replies: 43
Views: 47966
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