supported by the National Natural Science Foundation of China (Grant No. 30671708);the National Key Technology R&D Programme of the 11th Five-Year Plan of China (Grant No. 2006BAD32B01)
Pollen development and floral morphology of Populus pseudo-simonii were investigated by stain-squashing and anatomical techniques. It took approximately 16 days for the pollen to develop from pollen mother cells to ma...