油初始坐果机制研究

以成年油木奈树为材料,对其初始坐果进行了研究。结果表明,盛花后2周内,油木奈出现大量的落花落果;幼果(子房)低水平的GA1 3与油木奈的落花落果高峰关系密切,而内源细胞分裂素ZRs和[diH]ZRs以及ABA与幼果(子房)的生长呈显著的正相关;初始坐果期,油木奈的雌配子体发育缓慢,且有相当数量的胚囊中途退化、败育,无法正常受精,从而导致其大量的落花落果。文中就油木奈的初始坐果机制进行了讨论。

Studies on the Mechanism of Initial Fruit Set in Younai(Prunus salicina Lindl var.)

Some aspects on the initial fruit set in Younai(Prunus salicina Lindl var.cordata J Y Zhang et al) were studied.The results showed that,large amount of flower/fruitlet drop occurred within 2 weeks after full blossom;low content of GA1 3 was closely correlated to the peak of fruit drop,however,the contents of endogenous zeatin ribosides(ZRs),dihydrozeatin ribosides(ZRs) and abscisic acid(ABA) were significantly positive correlated to the growth of fruitlet(ovary);during the initial fruit set of Younai,quite a few of female gametophytes degenerated or aborted,and,the developmental process was slow after anthesis,which therefore,blocked fertilization and resulted in flower/fruitlet abscission.The mechanism of initial fruit set in Younai was discussed in this paper.