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

Learning objectives of metabolic diseases, Q. Learning objectives of metabo...

Q. Learning objectives of metabolic diseases? • enumerate the etiological factors and symptoms of gout and few inborn errors of metabolism, • describe the metabolic changes

Inter specific incompatibility, Inter specific Incompatibility This t...

Inter specific Incompatibility This type of incompatibility is characterized by the prevention of fusion of gametes between members of different species. The incompatibility

Explain the basic concept of adulteration, Explain the Basic Concept of Adu...

Explain the Basic Concept of Adulteration? Food adulteration is the change in original composition and quality of food by adding, removing or substituting some ingredients of f

Name the molecules make active transport through membranes, Which are the m...

Which are the molecules that make possible active transport through membranes? Active transport is made by exact membrane proteins. These proteins are called "pumps" because

Functions based on management principles, FUNCTIONS BASED ON MANAGEMENT PRI...

FUNCTIONS BASED ON MANAGEMENT PRINCIPLES: Planning: The objectives of nursing unit should be achieved through planning, good coordination and supervision. While planning nur

Importance of reproduction, Importance of reproduction Reproduction ...

Importance of reproduction Reproduction is an important life process in animals and plants. Reproduction is the ability of an organism to produce new generation of indivi

Define about the extra-ocular muscles, Describe about the extra-ocular musc...

Describe about the extra-ocular muscles The extra-ocular muscles are mainly involved in the maintenance of postural tonicity and performance of quick contractions. The prima

Explain reality theory, Reality Theory Developed in  the 1960s by  Will...

Reality Theory Developed in  the 1960s by  Willian glasser,  a  psychiatrist,  reality  therapists  view human nature in terms of behaviour. They believe that human behaviour i

Explain transition period from renaissance to modern period, Explain Transi...

Explain Transition Period from Renaissance to Modern Period? The transition period from the Renaissance to the Modern period produced many notable workers and much literature.

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