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...
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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 *** indicated that the ovulating strobilus differentiation of *** cv.`Merrillii’ was mainly in the winter and the early *** ovulate strobilus formed in the middle and upper part of young tips of the *** primordia appeared in early November before which there was no distinction in the dissected shape between the mixed-bud and the nutrition *** 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 *** whole process lasted about 160 *** illumination and themoisture in summer and autumn were main conditions to affect the female flower bud differentiation.
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