作 者 ：LUO Yi-Bo, PEI Yan-Long, PAN Kai-Yu, HONG De-Yuan
期 刊 ：植物分类学报 1998年 2期
Keywords:Paeoniaceae, Paeonia suffruticosa subsp．Spontanea, Flowering, PollinationBiology, Breeding system, Bees, Beetles,
Abstract:
Field observation on pollination in three populations of Paeonia suffruticosa sub-
sp. spontanea in southern Shanxi Province showed that five species of bees in two families
and four species of beetles were engaged in pollination. Examination on bodies of these in-
sects under SEM, and seed set produced by controlled insect-pollination indicated that the
bees, especially the species in the genus Andrena were main pollinators and the beetles ex-
cept those of small size were only fluctuating vectors. Flowers of this taxon are scented and
nonectariferous. Flowers attracted bees and beetles mainly by pollen. A study on seed-set in
the three populations revealed considerable variation within and among populations. The
plants were no apomict and autogamy, but geitonogamy sometimes could produce mature
seeds (x＝ 2.86 seeds per carpel). In the population with less flowers (less than 40 flowers),
natural seed-set (x＝3.88) was close to the seed-set produced by hand cross-pollination (x =
3.21), but in the population with more flowers(near 100 flowers) natural seed-set (x＝
2.48) was lower than that by hand cross-pollination (x = 3.21). The seed-set was low for
both natural and artificial cross-pollination with only about one forth of ovules developing into
seeds.