郁南无核黄皮花果生长发育的生物学特性研究

Studies on the biological characteristics of flowering and fruit development of Yunan seedless wampee (Clausena lansium)

对郁南无核黄皮花、果生长发育的生物学特性进行系统观察的结果表明:无核黄皮的花粉比有核黄皮的花粉略大,且大小不均匀,畸形率相对较高,花粉萌发率低,花粉管短;无核黄皮开花10天后进入盛花期,开花高峰期持续1周,累积开花曲线呈'S'形;果实发育历时3个月,其中有2次落果高峰,分别发生在谢花后7～10天和谢花后30～35天,谢花后的座果率低.指出在盛花期和谢花期使用保果剂可使无核黄皮的座果率明显提高.

The research showed that the pollen of seedless wampee is approximately round in shape and unequigranular. It has a high abnormality rate, a low pollen germination rate and short pollen tubes. Its flowering climax comes in 10 days since the beginning of bloom and lasts one week. Accumulative bloom rate curve shows an S- pattern and fruit growth takes three months, during which there are two fruit-drop climaxes, one occurs in the days of 7th～10th after flower withering and the other in 30th～35th. The plenty of dropped fruit results in a few fruit-bearing. But with the spraying of the fruit-retaining agent （plant hormone） at full bloom and flower withering period, the fruit-bearing rate cars be increased greatly.