Auxins, Biology

Auxins

The history of discovery of auxin is a fascinating chapter in plant physiology. The hormone auxin was discovered first, through some elegant experiments by Charles Darwin and his son Francis around 1880. They found that if a coleoptile of a grass (Phalaris) was illuminated from one side it bends towards light. However, if the tip region was covered, no bending occurred. In his book "The Power of Movement in Plants" published in 1880, Darwin wrote that some matter in the upper part, which is acted upon by light, transmits its effect to the lower part causing the latter to bend.

1574_Auxins.png

Figure: Darwin's experiment on canary grass coleoptiles

Posted Date: 1/17/2013 6:06:09 AM | Location : United States







Related Discussions:- Auxins, Assignment Help, Ask Question on Auxins, Get Answer, Expert's Help, Auxins Discussions

Write discussion on Auxins
Your posts are moderated
Related Questions
uses of conductometry in biological experiments

Which of the following statements about how B and T cells recognize antigen are true? a. B cells only recognize antigen presented by class I or class II MHC molecules. b. Both cell

A small family was traveling in the car when a minor accident happened. The children in the back seats were wearing lap belts, but still sustained numerous bruises about the abdome

Explain about natural pigments There has been an extensive search of the microbial, plant and animal kingdoms for pigments that possess both high tinctorial power/strength (a m

Define Procedure for Testing the Presence of Sugar in Milk? 1. Take 0.1 ml of milk sample in a test tube. 2. Add 0.2 ml of resorcinol solution (0.05 gm of resorcinol in 100

Determine the Procedure of Armamentarium 1. Make an impression of the mandibular ridge and pour the cast in type 3 gypsum 2. Apply separating medium and allow it to dry 3

Q. Explain the Technique of Balloon Mitral Valvuloplasty? The procedure is performed by cannulation of the right femoral vein and the procedure is similar upto transseptal punc

what effects do human technologies have on our water systems?

Define Functions of Manganese? Like other micro minerals, Mn also functions in mammalian enzyme systems. It can function both as an integral part of metalloenzymes and as an en

Polymorphism in Lysosomes Polymorphism, i.e. existence of a structure in more than one form, is an important feature of lysosomes. Several different forms of lysosomes have been