青杆

蛋白磷酸酶PP1和（或）PP2A参与调节青杆（Piceawilsonii）花粉萌发及花粉管生长

Protein Phosphatase 1 and / or 2A is Involved in the Regulation of Pollen Germination and Tube Growth in Picea Wilsonii

华北地区青杆群落以高位芽植物占比例最大，但其中以中、小高位芽及矮高位芽植物为主。

Phanerophytes took the largest proportion of North China Picea wilsonii community , in which were mainly middle phanerophytes , small phanerophytes and short phanerophytes .

同时，纳摩尔浓度的OA和CalA明显抑制青杆花粉萌发以及花粉管的生长，并导致部分青杆花粉管畸形生长。

At nanomolar concentrations , OA and CalA clearly inhibited pollen germination and tube growth and led to abnormal morphology of pollen tubes .

青杆林和山杨林下植物叶结构特征及其与叶干重的关系

The Comparison of Leaf Structure of Plants in Spruce Forest and Poplar Forest and the Relationship Between Leaf Structure and Leaf Dry Weight

华北地区青杆群落主要分为乔木层、灌木层、草本层，有时还有苔藓层，且有层间植物出现。

North China Picea wilsonii community was divided into three layers , tree layer , shrub layer , and herb layer , sometimes also moss layer .

华北地区青杆群落植物区系以北温带分布属为主，与世界分布属一起形成该区系的主干，所以该区植物以温带性质为主。

Flora Areal-types of North China Picea wilsonii community were mainly north temperate distribution , together with cosmopolitan distribution contributed the main floristic composition of the communities . Therefore the flora had temperate characteristics .