论文部分内容阅读
二、赤霉素(简称GA) 赤霉素是水稻恶苗病的代谢产物,它是高等植物中普遍存在的一种强烈的天然激素,市售品赤霉素是从培育乔霉菌中提取的。目前已发现的赤霉素约有50多种,最常见的是赤霉素酸(即GA_3)。纯品赤霉素为白色结晶的粉末。它能溶于酒精、丙酮、醋酸乙脂等有机溶液,难溶于水,在酸性及中性溶液中稳定,遇碱易分解。赤霉素具有无极传导特性,它在低浓度下能显著促使植物细胞体积增大、茎叶伸长,增加植株高度;调节控
Second, gibberellin (referred to as GA) Gibberellin is a metabolite of rice Bakanae disease, it is prevalent in higher plants is a strong natural hormone, gibberellic acid commercially available from the cultivation of mold extraction . At present, there are about 50 kinds of gibberellins found, the most common is gibberellic acid (GA_3). Pure gibberellin is a white crystalline powder. It is soluble in alcohol, acetone, ethyl acetate and other organic solvents, insoluble in water, stable in acidic and neutral solution, case of alkali easily decomposed. Gibberellin has the characteristics of electrodeless conduction, which can significantly promote plant cell volume, stem and leaf elongation and plant height at low concentrations;