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| Study on the seedless mechanism of seedless‘Hongjiangcheng’ |
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| DOI：10.16768/j.issn.1004-874X.2016.10.012 |
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| Abstract: |
| The seedless‘ Hongjiangcheng’〔Citrus sinensis（L.）Osbeck〕and seedy‘ Hongjiangcheng’were
used as materials of the experiment in the study. Their pollen viability and germinating viability，embryo sac fertility
and embryonic development were studied. The results showed that，compared with the seedy‘ Hongjiangcheng’，the
pollen sterility of seedless‘ Hongjiangcheng’ happened，the pollen viability and germinating viability significantly
declined and rate of malformation significantly rised at the same time. The pollen viability and germinating viability of
seedless‘ Hongjiangcheng’belonged to the type of low development. The embryo sac of seedless‘ Hongjiangcheng’
could fertilize normally. Mature embryo sac had one egg，two synergids，three antipodal cells and a big central cell
which contained two polar nuclei. The embryonic development of seedless‘ Hongjiangcheng’happened according
to the study of a few different periods. The most embryos began to degenerate at the four weeks after pollination. The
endosperms disappeared with development and maturity of cells in the six weeks after pollination. And in the seven
weeks after pollination，the most embryos and endosperms disappeared and seedless fruits produced in the end. The
degeneration of pollen and embryos was the mainly seedless reason for seedless‘ Hongjiangcheng’development
compared with seedy‘ Hongjiangcheng’. |
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