林业科学
林業科學
임업과학
SCIENTIA SILVAE SINICAE
2009年
10期
155-157,封3
,共4页
程晓建%黎章矩%喻卫武%戴文圣%周文声
程曉建%黎章矩%喻衛武%戴文聖%週文聲
정효건%려장구%유위무%대문골%주문성
香榧%榧树%雌球花%花芽分化
香榧%榧樹%雌毬花%花芽分化
향비%비수%자구화%화아분화
Torreya grandis cv.'Merrillii'%T.grandis%ovulate strobilus%flower bud differentiation
To provide the scientific basis for establishing the efficient cultivation and management measures of Torreya grandis cv. ' Merrillii' , the process of the female flower bud differentiation was studied with the paraffin method. Results indicated that the ovulating strobilus differentiation of T. grandis cv.'Merrillii' was mainly in the winter and the early spring. The ovulate strobilus formed in the middle and upper part of young tips of the mixed-bud. Their primordia appeared in early November before which there was no distinction in the dissected shape between the mixed-bud and the nutrition bud. Through the developments of bract, ovule scale, nucellus and integument, the strobilus started to blossom in the next mid-April and entered in a period of free nucleus of endosperm without formed female gametophyte and archegonium. The whole process lasted about 160 d. The illumination and themoisture in summer and autumn were main conditions to affect the female flower bud differentiation.
