In diatoms the vegetative cells are diploid, and are formed directly by the fusion of gametes.
硅藻类的营养细胞是二倍体，它是由配子融合直接产生的。
2
The polyploidy cell masses and the haploidy cells appeared in the tissue cultures will not result in the hereditary variability and the changes of the character in the original diploid species.
组织培养中出现的多倍性细胞团和单倍性细胞，不会引起原二倍体物种的遗传性变异和性状变化。
3
The identification results of cell ploidy in the material induced showed that most strains were mosaic with diploid and tetraploid cells at average levels of 79.4% and 20.6% respectively.