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一、用生长调节物质处理插穗(一)生长素的生理作用归纳起来主要有;1、促进插枝形成不定根;2、促进愈合组织的形成;3、阻止腋芽发育;4、促进或抑制花芽的形成;5、果实的肥大生长和单性结实;6、防止果实和叶片的衰老脱落等等。生长素能促进细胞生长,研究指出,生长素促使细胞壁的可塑性增强,从而提高了它的伸展性,容许细胞吸水,使细胞体积增大。生长素只有在保证氧气供应,呼吸作用正常的条件下才能通过原生质的作用促进细胞生长。生长素所软化的只是细胞壁内可塑性
First, with growth regulating substances processing cuttings (A) the physiological role of auxin to be summarized mainly; 1, to promote adventitious bud formation; 2, to promote the formation of healing tissues; 3, to prevent the axillary bud development; 4, to promote or inhibit flower buds Formation; 5, the fruit of hypertrophy and growth of unisex; 6, to prevent the decline of fruits and leaves of aging and so on. Auxin can promote cell growth, studies have shown that auxin promote plasticity of the cell wall to enhance its extensibility, allowing cells to absorb water, so that the cell volume increases. Auxin can promote cell growth through the action of protoplasm only under the condition of ensuring oxygen supply and respiration. Aging hormone softens cell wall plasticity