Harper J L, Wallace H L
Unit of Plant Population Biology, School of Plant Biology, University College of North Wales, LL57 2UW, Bangor, Gwynedd., UK.
Oecologia. 1987 Nov;74(1):31-38. doi: 10.1007/BF00377342.
Plants of the inbreeding perennial herb Epilobium montanum L. were defoliated at two stages in development and the formation and abortion of flower buds, flowers, copsules and ovules was compared with control plants. A comparison was also made of the effects of self- and cross-pollination on fecundily. Defoliation reduced the number of flower buds formed but its greatest effect was to increase the abortion of flower buds. Defoliation also caused earlier abortions which were generally lower on the racemes of the treated than on the control plants. The abortion of flowers and capsules was much less significant. The number of ovules formed per capsule decreased with height on the raceme and the abortion rate of ovules was increased by defoliation. The pattern of ovule abortion within the capsules differed between cross- and self-pollinated plants but the number of seeds ripened was not affected. The overall survivorship of ovules to mature seeds was 89.3% which compares with the average of 85% found by Wiens for inbreeding annuals. The findings suggest that such high values of ovule survivorship may be characteristics of normally inbreeding species irrespective of whether they are annuals or perennials.
对自交多年生草本植物山地柳叶菜（Epilobium montanum L.）在两个发育阶段进行去叶处理，并将其花芽、花、蒴果和胚珠的形成及败育情况与对照植株进行比较。同时还比较了自花授粉和异花授粉对结实率的影响。去叶减少了形成的花芽数量，但其最大影响是增加了花芽的败育。去叶还导致败育提前，处理植株总状花序上的败育情况通常低于对照植株。花和蒴果的败育则不太显著。每个蒴果形成的胚珠数量随总状花序上的高度而减少，去叶增加了胚珠的败育率。异花授粉和自花授粉植株蒴果内胚珠的败育模式不同，但成熟种子的数量不受影响。胚珠发育成成熟种子的总体存活率为89.3%，与Wiens在自交一年生植物中发现的85%的平均值相比。研究结果表明，如此高的胚珠存活率可能是正常自交物种的特征，无论它们是一年生植物还是多年生植物。
