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Initiation of programmed cell death in the suspensor is predominantly regulated maternally in a tobacco hybrid.

Abstract：

:Maternal gene products deposited in the egg regulate early embryogenesis before activation of the embryonic genome in animals. While in higher plants, it is believed that genes of parental origin contribute to early embryogenesis. However, little is known regarding the particular processes in which genes of parental origin are involved during early embryogenesis. Previously, we found that the initiation of programmed cell death (PCD) in the suspensor of the embryo is regulated by the cystatin, NtCYS. Here, we confirmed that both parental transcripts contribute to PCD, but the relative expression level of the maternal NtCYS allele was much higher than that of the paternal allele in early embryos of tobacco interspecific hybrids. The expression level of the maternal NtCYS allele was decreased markedly, which was necessary for the initiation of PCD, while the paternal allele didn't change. Interestingly, the pattern of PCD in the hybrid suspensor and the morphology of the hybrid suspensor were similar to those of the maternal parent. Our results suggest that NtCYS-mediated PCD initiation in the hybrid suspensor is likely controlled in a maternal dominant manner. This finding represents an example of the involvement of parental transcripts in a specific developmental event during early embryogenesis.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Luo A,Zhao P,Zhang LY,Sun MX

doi

10.1038/srep29467

subject

Has Abstract

pub_date

2016-07-19 00:00:00

pages

29467

issn

2045-2322

pii

srep29467

journal_volume

6

pub_type

杂志文章

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