Effect of Ice Nucleation Active Bacteria on the Ultrastructure of Apricot VarietiesOvule

ACTA HORTICULTURAE SINICA ›› 2004, Vol. 31 ›› Issue (1): 21-24.

• 研究论文 • Previous Articles Next Articles

Effect of Ice Nucleation Active Bacteria on the Ultrastructure of Apricot VarietiesOvule

Peng Weixiu, Yang Jianmin, Zhang Qin, Meng Qingrui

( College of Gardens and Tourism , Agricultural University of Hebei, Baoding 071000, China)

Received:2003-03-13 Revised:2003-06-05 Online:2004-02-25 Published:2004-02-25
Contact: Yang Jianmin

Abstract

Abstract: The ultrastructure of two kinds of apricot ( Prunus armeniaca L. ) ovule by ice nucleation active (INA) bacteria and low temperature was investigated with transmission electron microscopy. The results showed that the ultrastructure of ovule was influenced by the INA bacteria. (1) The plasmolysis phenomenon occurred in the nucellus cells, a great lot of vesicle structures existed in the cytoplasm. The structures of mitochondrion was entirely damaged and turned transparent . Furthermore there were multi2membrane inclusions with concentric circles in some nucellus cells. (2) The ectoblast nuclear membrane of ovum in embryo-sac was inflated. The nuclear membrane was disintegrated partly and number of organelles in cytoplasm decreased. Therefore , the ovule could not develop normally , which interfered the spermatiation and led to the reduction in apricot yield or even no outputat all. In addition, compared with the treatment of only low temperature , the ovule ultrastructure by the treatment of both low temperature and INA bacteria inoculation were devastated more seriously. Therefore , INA bacteria was one important factor to aggravate frost injury to apricot flowers.

Key words: Apricot, Ice nucleation active bacteria, Ovule, Ultrastructure

CLC Number:

S 662.2

Peng Weixiu;Yang Jianmin;Zhang Qin;Meng Qingrui. Effect of Ice Nucleation Active Bacteria on the Ultrastructure of Apricot VarietiesOvule[J]. ACTA HORTICULTURAE SINICA, 2004, 31(1): 21-24.

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Effect of Ice Nucleation Active Bacteria on the Ultrastructure of Apricot VarietiesOvule

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