sperm nucleus


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Related to sperm nucleus: haploid nucleus

sperm nucleus

[′spərm ‚nü·klē·əs]
(botany)
One of the two nuclei in a pollen grain that function in double fertilization in seed plants.
References in periodicals archive ?
Reger (1970) has also described the development of a prominent acrosome and rounding up of the sperm nucleus during spermiogenesis in the spider Pisaurina sp.
Therefore, the older tests were gradually replaced by more accurate tests such as sperm nucleus and chromatin evaluation.
Although the above studies have revealed variation in the size and shape of the sperm nucleus and acrosome between species, in all cases the nucleus forms at least 30% of the head length.
If the sperm nucleus contains fragmented DNA, the haloes are larger and spotty, because of the presence of dispersed DNA fragments (Fig.
The ISNT-condensed assay is reliant on the access DNA polymerase 1 gains to the genome as a result of incomplete compaction of the sperm nucleus, the level of DNA nick end labelling being highly correlated with the levels of sperm nucleus protamination (46).
However, excessive amounts of ROS produced by leukocytes and immature spermatozoa can damage mature spermatozoa and can damage the integrity of the DNA in the sperm nucleus (Agarwal et al.
If sperm chromatin is well differentiated, it is in the form of protamine-DNA complex and will not be stained by CMA3, TB or AB; if the protamine of chromatin is defective, the sperm nucleus would be stained.
With the sperm nucleus, mitochondria, and flagellar axoneme inside the egg cytoplasm, the GSH labeling remained as a ring-like structure on the surface of the egg (Fig.
After binding, sperm are incorporated into the egg cytoplasm and the sperm nucleus begins to decondense (Fig.