Macrospore metrocyte of Pinus sylvestris var. mongolica developed to female gametophyte containing female gamete-egg by a series of changes.

摘要大孢母细胞经一系列变化，发育成雌配体。

Selected production and processing of Pinus sylvestris, Finland wood, Southern Pine, Meranti and other anti-corrosion, charring wood products.

精选生产加工的、、方、柳桉等防腐、炭化制品。

Zhanggutai lies on the verge of south east of keerqing sand,is subarid area , and is the earthest introduction area of pinus sylvestris var.mongolica.

章古台沙地位于科尔沁沙地的东边缘,属半干旱地带,是最早进行引种的地区。