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柳杉的花芽分化是年发育周期中的重要物候期。本文着重研究雌雄球花芽分化的各个时期和其他物候期的关系,结果如下: 柳杉雄球花原基于6月下旬开始分化,7月上旬形成小孢子叶球(雄球花)原基和小孢子叶,7月下旬出现小孢子囊原基,10月上旬形成小孢子母细胞。 柳杉的雌球花原基于6月中旬开始分化,7月下旬苞鳞形成,胚珠原基和珠鳞原基的分化在8月底和11月中,11月上旬形成珠被,11月底形成大孢子母细胞,胚囊在翌年2月底形成。
Cryptomeria japonica flower bud differentiation is an important phenophase in the development cycle. This paper focuses on the relationship between flower bud differentiation in different stages and other phenophases. The results are as follows: The caryopsis of Cryptomeria japonica begins to differentiate in late June and formed primordia and microspores of microsporophyte (male flower) in early July Leaves, in early July microsporidium primordia, microspore mother cells formed in early October. The Cryptomeria fortunei began to differentiate on the basis of mid-June. At the end of July, bud scales formed. The differentiation of ovule primordium and globulus primordia formed beads in late August and mid-November, early November and formed large Spore mother cells, embryo sac in the following year the formation of the end of February.