you are: Abstsizovaja stress acid-hormone
One of leading roles ABK in a plant consists, obviously, that it supervises closing ustits. It is fast reaction whereas the induction of rest under the influence of ABK represents slower general change of a metabolism. as well as auksin, ABK operates by means of several basic mechanisms. At closing ustits it influences moving kalija from closing cages. At indutsirovanii rest it, apparently, blocks synthesis RNK and fibers. in this last case ABK should show selective action as if cellular division and fiber synthesis based kidneys could not be formed even has completely stopped. The processing of plants ABK simulating increase of level endogennoj ABK, too causes fast suppression of growth of stalks or koleoptilej. What role endogennoj ABK in growth restriction, it is not found out yet. At last, there is a question, whether participates ABK in the course of ageing and death of annual grasses about what it was told earlier. Its maintenance often raises in growing old leaves, but attempts to establish correlation between level ABK and death of the whole plant were till now unsuccessful. it is obvious, we need to learn still much about the hormonal control of this stage of life cycle of a green plant.
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