Upside Down Clone - Will it root??

Gravitropism*(also known as*Geotropism) is a turning or growth movement by a*plant*or*fungus*in response to*gravity. It is a general feature of all*higher*and many*lower*plants as well as other organisms.*Charles Darwin*was one of the first to scientifically document that*roots*show*positive gravitropism*and stems show*negative gravitropism. That is,*roots*grow in the direction of gravitational pull (i.e., downward) and*stems*grow in the opposite direction (i.e., upwards). This behavior can be easily demonstrated with any potted plant. When laid onto its side, the growing parts of the*stem*begin to display negative gravitropism, growing (biologists say, turning; see*tropism) upwards. Herbaceous (non-woody) stems are capable of a small degree of actual bending, but most of the redirected movement occurs as a consequence of root or stem growth in a new direction.

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Brassinosteroids, are a class of*polyhydroxysteroids, a group of plant growth regulators. Brassinosteroids have been recognized as a sixth class of*plant hormones, which stimulate cell elongation and division,*gravitropism, resistance to stress, and*xylem*differentiation. They inhibit*root*growth and leaf*abscission.

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