Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Pollen germination of triploid ‘ZH1’ and diploid ‘ZH2’ P. deltoides. (A) Somatic chromosome number in triploid poplar ‘ZH1’ and diploid poplar ‘ZH2’; (B) pollen tube growth of ‘ZH1’ and ‘ZH2’ during the germination (2, 4, 8, 12, and 24 h); (C) pollen germination rate of ‘ZH1’ and ‘ZH2’; (D) pollen tube length distribution of ‘ZH2’ pollen during the germination.
