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[Biological Characteristics and Pollen Morphology of Different Chaenomeles Species in Flowering Stage].

OBJECTIVE
The biological characteristics and pollen morphology of different Chaenomeles species in the flowering stage were studied,in order to provide a theoretical basis to discriminate the germplasm resources and new cultivars selection.


METHODS
Field research and scanning electron were used for the research of the biological characteristics and pollen morphology of Chaenomeles species.


RESULTS
The differences were significant both in the size of petal and the quantity of stamen in different kinds of Chaenomeles species. The pollen of Chaenomeles speciosa and Chaenomeles japonica were perprolate, and the ratio of the length between poles and diameter of the equator was more than two. The ratio of Chaenomeles sinensis, Chaenomeles cathayensis and Chaenomeles thibeticae ranged from 1.87 to 1.93 and they were prolate. The characteristics,such as the length between poles of pollen grain,diameter of the equator, the ratio of the length between poles and diameter of the equator, surface ornamentation and tectum perforation, had close genetic relationship with Chaenomeles species.


CONCLUSION
Biological characteristics and pollen morphology could be the value reference to identify different kinds of Chaenomeles species.