油茶授粉受精及早期胚胎发育

Abstract

Abstract:

The processes of pollination, fertilization and embryo development in Camellia oleifera‘Xianglin XLC15’were examined under a microscope. The results showed that the pollen germination occurred in 2 h after pollination, the pollen tubes grew up to the base of the style in 48 h after pollination. The pollen tubes entered into the embryo sac through a degenerated synergid, which belonged to the porogamy type. Approximate 23% of the pollen tubes were observed to penetrate into the embryo sac. The fusion of sperm cells and polar nucleus mainly occurred in 3-10 days after pollination, while fusion of sperm cell and egg cell occurred in 5-16 days after pollination. The double fertilization was of the premitotic syngamy type. The primary endosperm nucleus did not begin to mitosis until they were formed, and the development of endosperm belonged to the nuclear type. Endosperm nucleuses were extremely underdeveloped, the endosperm was composed with large but few cells. The zygote resumed rapid growth after a dormant period of 4 months, and later globular embryo with obvious suspensor formation in 200 days following pollination. Thus, the development of embryo conformed to the Solanad type.

Key words: Camellia oleifera, pollination, fertilization, embryonic development

CLC Number:

S718.4

Liao Ting, Yuan Deyi, Gao Chao, Zou Feng, Tang Jing, Tan Xiaofeng. Pollination, Fertilization and Early Embryonic Development of Camellia oleifera[J]. Scientia Silvae Sinicae, 2014, 50(2): 50-55.

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Pollination, Fertilization and Early Embryonic Development of Camellia oleifera

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