赤霉素是另一类存在于棉花体内的生理上十分活跃的植物内源激素。因为首先是从赤霉菌得到的,所以称之为赤霉素(通常用GA来表示)。后来又相继从其它微生物和高等植物中普遍得到类似的物质,虽然化学结构不尽相同,但基本生理功能是相似的,所以赤霉素不是一种而是一个“家族”的总称。到目前为止,已经有62个成员,为方便起见,按其分离的先后次序,加以标号,即 Gibberellins are another class of physiologically active plant endogenous hormones present in cotton. It is called gibberellin (usually GA) because it is obtained from Gibberella. Later, one after another from other microorganisms and higher plants generally get similar substances, although the chemical structure is not the same, but the basic physiological functions are similar, so gibberellin is not a but a “family” in general. So far, 62 members have been labeled for convenience, in the order of their separation, namely