植物生长调节剂诱导龙眼果实无核化效应

对在福建主栽的大核龙眼品种‘乌龙岭'进行了植物生长调节剂赤霉素(GA3)、6-苄氨基嘌呤(6-BA)、2,4,5-三氯苯氧丙酸(2,4,5-TP)、多效唑(PP333)和青鲜素(MH)等诱导果实无核化的试验.结果表明:5种植物生长调节剂均在不同程度上诱导龙眼果实形成焦核和小核果;6-BA和MH是效果较好的龙眼果实无核化诱导剂;效果最好的两个处理分别为6-BA(100 mg/L) CPPU(30 mg/L)和MH(800 mg/L) CPPU(30 mg/L),其果实核重分别比对照减少38.5%和38.0%,单果重分别为9.77 g和8.42 g,可溶性固形物分别为18.57%和18.23%,小核率分别达62.2%和83.3%.

Induction of Abortive Seeds by Plant Growth Regulators in a Longan Normal-seeded Cultivar

The investigation was carried out to evaluate the effects of five plant growth regulators(PGRs) on a normal-seeded cultivar of longan(Dimorcarpus longana Lour. cv.'Wulongling') for inducing abortive seeds.Results showed that all the five plant growth regulators induced some abortive seeds in certain extent.MH and 6-BA were preferable inducers.The best two treatments were 6-BA(100 mg/L) CPPU(30 mg/L) and MH(800 mg/L) CPPU(30 mg/L) were the best of all.It was seen that the weights of seeds were reduced by 38.5% and 38.0% respectively,compared with the control weights 9.77 g and 8.42 g.Total soluble solid contents are 18.57% and 18.23%.The degenerated seed percentages were 62.2% and 83.5%.