What is phototropism, Biology

Assignment Help:

What is phototropism?

Phototropism is the movement of plant structures in response to light. Phototropism might be positive or negative. Positive phototropism is that in which the plant movement (or growth) is towards the light source and negative phototropism is that in which the movement (or growth) is inverse, away from the light source.

Phototropism relates to auxins as the exposition of one side of the plant to light makes these hormones concentrate in the darker side. This fact makes the auxin action upon the stem to be positive, i.e., the growth of the darker side is more intense and the plant arcs towards the lighter side. In the root (when submitted to light, in general experimentally) the auxin action is negative (over the positive range), the growth of the darker side is inhibited and the root curves towards this side.

Plant Physiology - Image Diversity: phototropism

 


Related Discussions:- What is phototropism

Zoology, right classification of protozoa up to class

right classification of protozoa up to class

What is herbicide tolerant crops in evolutionary, Evolutionary ...

Evolutionary Herbicide tolerant crops (HTC) Increased use of herbicide can result in increase in development of weed resistance to that herbicide either through

TISSUES, difference between axon and cyton

difference between axon and cyton

Explain enzymes, Explain Enzymes Enzymes are the proteins that  act  ...

Explain Enzymes Enzymes are the proteins that  act  as  catalysts,  speeding the  rate  at which biochemical reactions proceed but not altering  the direction or nature of th

What do you know by hemodynamic responses, Q. What do you know by Hemodynam...

Q. What do you know by Hemodynamic Responses? Reduced exercise capacity roughly reflects impaired LV function, and may contribute its prognostic value to this association. Comp

What is herbicide tolerant crops in ecological, Herbicide tolerant crops (H...

Herbicide tolerant crops (HTC) Increased use of the herbicides plant is tolerant to (describes ecological impact eg toxic residues in soil, runoff into waterways) Ther

Define the phosphorus - the macromineral, Define the Phosphorus - The Macro...

Define the Phosphorus - The Macromineral? The body contains about 620 g (20 moles) of phosphorus. Of this 87% is present in bones. It is thus more widely distributed in the bod

Of which cells is the nervous tissue constituted, Of which cells is the ner...

Of which cells is the nervous tissue constituted? How is the generic function of this tissue related to the characteristics of the main cell type that forms it? The nervous tis

Cells, Cell theory exception

Cell theory exception

Explain acute infections fever, Explain Acute Infections Fever Acute In...

Explain Acute Infections Fever Acute Infections Fever:  Acute fevers are of short duration with acute symptoms, the body temperature may rise to above 104°F. Examples of such i

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd