the Hormonal control of speed and a growth direction. As all it began

you are: the Hormonal control of speed and a growth direction

Hormones and their synthetic analogues have found in agriculture wide application as regulators of flowering, fructification, maturing, rest and subsidence of bodies, and also as stimulators korneobrazovanija and herbicides of selective action. it is paradoxical that such important practical opening have grown out of some researches in which it was not pursued any practical purposes. The data about existence rostovyh hormones in plants has been received for the first time approximately in 1880 in experiences of Charlza of Darwin and his son Frensisa which studied bends of sprouts of a cereal towards light. having placed small lightproof cylindrical glass screens on koleoptili these sprouts, researchers could show that though only the top of this body is capable to perceive the weak light causing it a bend, the zone located on some millimetres below a top is bent also. Darwin in the book ' About ability of plants to movement ', published in 1881, has assumed that any razdrazhitel passes from a top to a growing zone and causes there specific rostovoj effect. This idea has induced many researchers to continue the experiences begun by Darwin, and in 50 years the Danish post-graduate student Fritsu Ventu managed to confirm that top koleoptilej cereals really form significant amounts of capable substance to the diffusion, supervising growth of underlaying zones. This substance named auksinom, became a prototype of vegetative hormones and has created a basis for modern chemical agriculture.

The opening History auksina testifies that the researches absolutely not not connected with manufacture and directed only on search of new knowledge, can sometimes yield rather important economically results. If it was ordered to Darwin to create means of struggle against weeds it, undoubtedly, would not put the experiences on studying of perception by light plants, led to opening auksina. Therefore at the organisation of scientific researches and their financing it is necessary to create the conditions promoting free creativity of scientists.