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

Define the effect of scfa on sodium absorption, Define the effect of SCFA o...

Define the effect of SCFA on Sodium Absorption? SCFAs (short chain fatty acids) have a stimulatory effect on sodium absorption from colonic lumen. The unionized SCFA crosses th

Metabolism of proteins, The major component of food is protein. The protein...

The major component of food is protein. The proteins ingested as part of our diet are not the same proteins required by the body, nor can large molecules be absorbed from the gut.

Alcoholism, ALCOHOLISM - Continual heavy consuming of alcohol is cal...

ALCOHOLISM - Continual heavy consuming of alcohol is called alcoholism or drinking . Word alcohol is refered to C 2 H 5 OH or ethyl alcohol or ethanol or grain alcohol.

Explain haploid cells and triploid cells, Q. Can mitosis occur in haploid (...

Q. Can mitosis occur in haploid (n) cells and in triploid cells? The mitotic cell division can occur in haploid (n) cells, diploid (2n) cells, triploid (3n) cells, and so on. M

What is vascular, Vascular Preoperative administration of a cephalospor...

Vascular Preoperative administration of a cephalosporin decreases the incidence of postoperative surgical site infection after arterial reconstructive surgery on the abdominal

Explain selective and differential culture media, Explain Selective and Dif...

Explain Selective and Differential Culture Media? These are used for isolation of specific organisms. These are designed to isolate a group of closely related organisms and dif

State the important role of microorganisms, State the important role of mic...

State the important role of microorganisms The important role of microorganisms was recognised as early as 1838, when J.B. Boussingeutt a French agricultural chemist observed t

Normality, what is the normality law?

what is the normality law?

Urine formation by excretory organs, Normal 0 false false f...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

Oxygen cycle, Oxygen is a major component of all living organisms. All the ...

Oxygen is a major component of all living organisms. All the organisms and plants required oxygen for aerobic respiration which they absorb from environment. Only plants release ox

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