Observation of citrus embryo development showed that in 50 days or so after pollination there was only one zygotic embryo in the embryo sac, and nucellar embryo was not yet invaded.
通过柑桔胚胎发育观察表明，授粉后50天左右，胚囊内仅有一个合子胚，未见珠心胚侵入胚囊，为单独分离合子胚培养的最好时期。
This kind of development was similar to that of the zygotic embryo in monocotyl.
其发育过程类似于单子叶植物合子胚的发育过程。
The development of the embryoids is similar to that of the zygotic embryo.
“胚状体”的发育与合子胚的发育过程相似。
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