Cytomorphological Studies on the development of pollen in Paeonia rockii cv.Meigui Sajin was conducted.There was a obvious pollen dimorphism that 84.3% pollen grains was normal and 15.7% anomalous.Development of normal pollens passed through five stages:single nucleus early stage,single nucleus late stage,pollen first mitosis stage,2-celled pollen early stage and 2-celled pollen late stage.Anomalous pollens were differentiated at the single nucleus late stage from normal microspore.Most of them stopp...
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