Pollen Viability, Pistil Receptivity, and Embryo Development in Hybridization of Nelumbo nucifera Gaertn

Figure 2

Pollen grains and pollen tubes on stigmas at 4 h after pollination and anatomical structure of young embryos. (A): Many pollen grains germinated on stigmas in “Jinsenianhua” × “Qinhuaihuadeng”. (B): A few pollen grains germinated on stigmas in “Qinhuaihuadeng” × “Jinsenianhua”. (C and D): Some abnormal pollen tubes in “Qinhuaihuadeng” × “Jinsenianhua”. (E): SEM micrograph of an abnormal pollen tube in “Qinhuaihuadeng” × “Jinsenianhua”. (F): SEM micrograph of a normal pollen tube in “Jinsenianhua” × “Qinhuaihuadeng”. (G): A normal globular embryo at 1 d after artificial pollination. (H): A normal heart embryo at 2 d after artificial pollination. Abbreviations: E (endosperm), Ge (globular embryo), He (heart embryo), I (integument), Pc (papilla cell), Pg (pollen grain), and Pt (pollen tube).