Phenolic inhibitors were preliminarily isolated from the normal and abortive litchi （Litchi chinensis Sonn.）ovules with a series of solvents, and then separated and purified by thin layer chromatography (TLC), further isolated and identified with GC MS, and finally checked with standards. p Hydroxybenzoic acid (p HBA) was isolated and identified from litchi ovules in this experiment for the first time. Determination of its biological activity showed that p HBA was a very strong growth inhibitory substance. In abortive ovules, p HBA content and IAA oxidase activity were much higher; IAA content was much lower than those in normal ovules (P<0.01). It is suggested that p HBA may be involved in the regulation of litchi embryo development; high content of p HBA may accelerate IAA oxidation and affect the balance of growth promoting and inhibitory substances, causing embryo abortion.
荔枝胚胎败育与酚类抑制物质的关系
全 文 ：