高山红景天不同性别植株花器形态的比较

Comparative Study on Floral Organ Morphology of Different Sexual Plants in Rhodiola sachalinensis A. Bor.

[目的]进一步了解栽培高山红景天花器的形态结构。[方法]对高山红景天不同性别植株的花器结构进行较为详细的比较研究。[结果]结果表明,高山红景天是多型的性别类型,有雌株、雄株、雌雄同株。雌雄同株是雄花、两性花同株类型,即一个植株的不同茎上着生雄花和两性花两种花序,两性花的花序中也有不同比例的雄花和两性花;高山红景天雌蕊心皮数目4为基本型,雄蕊花药数目8为基本型,两性花的雌蕊心皮和雄蕊花药数目都比单性花少的变异类型多。[结论]该研究为今后进一步进行高山红景天性别分化机理、性别利用、生殖生物学等方面的研究提供了可靠的理论依据。

[Objective] The objective of the research was to study floral organ morphology and configuration of cultivated Rhodiola sachalinensis.[Method] Floral organ structures of different sexual plants in R.sachalinensis were compared and studied in detail.[Result] R.sachalinensis had three types of sex types including female plant,male plant and monoecious plant.The monoecism plant was the same plant type with male flower and hermaphrodite flower.Different stalk of monoecism plant had two inflorescences of male flower and hermaphrodite flower,and there were different ratios of male flowers to hermaphrodite flowers in hermaphrodite inflorescence.The cardinal number of pistil carpel was 4,the cardinal number of stamen anther was 8,and the variation types of pistil carpel and stamen anther number in hermaphrodite flowers were more than that of low unisexual flower.[Conclusion] This study provided the theoretical basis for further studying mechanism of sexual differentiation,sexual usage and reproductive biology of R.sachalinensis.