Fast movements of plants. The summary

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Though plants are fixed by roots in one place, they are capable to various movements, from a slow curvature of stalks, sheet chereshkov and roots under the influence of certain factors (tropizmy) before sudden closing of traps at insectivorous plants. Mimosa pudica - the sensitive plant - slowly opens and puts the leaves under the influence of light and darkness, but very quickly - in reply to mechanical, temperature, chemical and electric stimulus. All movements depend on tourist's mountain changes in motor cages of a sheet small pillow. You will probably like cartoon movie download with your friends. touch to sheet causes an electric signal which in the form of short-term depoljarizatsii membranes moves on chereshku with a speed about 2 the Signal see/with is transferred by live cages floemy, and speed of its transfer increases with rise in temperature. Certain excitable cages give impulses (action potentials), i.e. elektricheski depoljarizujutsja if force razdrazhitelja exceeds threshold level. These impulses cause reaction in the next cages that leads to distribution of potential of action. It is yet known, whether from one cage on another transfer of electric reaction is connected with action chemical mediatorov (as in nervous system of animals) at plants.

Insectivorous plants catch and digest insects by means of various adaptations, passive and active, and use the digested material as a nitrogen source. With the help, passive traps (for example, kuvshinchikov) the plant entices insects in places of which they cannot get out because of sticky, slippery or detaining surfaces; active traps (for example, at a Venus flycatcher) are quickly closed after stimulation by an insect of sensitive starting mechanisms. At a Venus flycatcher movement is preceded by electric signals and sudden changes tourist's mountain of motor cages. Two irritations made with an interval no more than nearby 15 with then the trap is closed approximately for 0,1 with are necessary for reaction excitation. Digestion products keep a trap in the closed condition and when the insect is completely digested, the trap opens and is again ready to action.

The Plants which do not have a rigid stalk, can reach the big height thanks to the short moustaches, capable to twist round firm objects. The short moustache ' finds ' a support as a result of casual contact at circular motions, and then is twisted round it in reply to mechanical stimulation. Later the free rings drawing a stalk to a support are formed, and then still bolshemu to fastening can promote lignifikatsija (odrevesnenie). At peas at which short moustaches start to twist through 2 mines after stimulation, light as it strengthens formation ATR can favour to this reaction. At a twisting abaksialnye cages are compressed, and adaksialnye are stretched. Symmetric processing auksinom can lead to asymmetric reactions and as consequence - to a twisting; probably, it is connected with asymmetric formation etilena. The cages sensitive to a touch, are near to a short moustache top, and reacting cages - as at a top, and more low.