Study on the pollen morphology of Populus.

杨属树种花粉形态的研究。

Floral morphology of Populus lasiocarpa Oliv. and its phylogenetic position in Populus.

大叶杨花部形态及其在杨属的分类位置。

Populus is branch of wind pollination and Salix is an other branch of insect pollination.

杨属是杨柳科中适应风媒的分支；

Oxygen delignification of populus kraft pulp is studied.

进行了杨木硫酸盐浆氧脱木素的研究.

The electrophoretic analysis of Populus by isoperoxidases.

杨树过氧化物同功酶的电泳分析（一）。

A quantitative study on flower taxonomic characters of Populus tomentosa.

毛白杨花器分类性状的数量化探讨.

Ecological and Physiological Research on VA Mycorrhizas of Populus Ussuriensis.

大青杨VA菌根生理生态学研究.

The Populus euphratica calli were cultivated to study its salt tolerance , which was compared with Populus tremula.

本文以胡杨和欧洲山杨愈伤组织为研究材料，比较了两者耐盐性的差别。

Populus poll this month showed that voters favour Labour on welfare reform.

上个月的白杨调查显示选举人在福利改革问题上更倾向工党.

Studies on the Pulping Properties of Triploid Clones of Populus tomentosa Carr.

三倍体毛白杨纸浆材制浆特性研究。