In:
Frontiers in Plant Science, Frontiers Media SA, Vol. 14 ( 2023-3-2)
Abstract:
Male sterility is a valuable trait for watermelon breeding, as watermelon hybrids exhibit obvious heterosis. However, the underlying regulatory mechanism is still largely unknown, especially regarding the related non-coding genes. In the present study, approximately 1035 differentially expressed genes (DEGs), as well as 80 DE-lncRNAs and 10 DE-miRNAs, were identified, with the overwhelming majority down-regulated in male-sterile floral buds. Enrichment analyses revealed that the general phenylpropanoid pathway as well as its related metabolisms was predicted to be altered in a mutant compared to its fertile progenitor. Meanwhile, the conserved genetic pathway DYT1 - TDF1 - AMS - MS188 - MS1 , as well as the causal gene ClAMT1 for the male-sterile mutant Se18, was substantially disrupted during male reproductive development. In addition, some targets of the key regulators AMS and MS188 in tapetum development were also down-regulated at a transcriptional level, such as ABCG26 ( Cla004479 ), ACOS5 ( Cla022956 ), CYP703A2 ( Cla021151 ), PKSA ( Cla021099 ), and TKPR1 ( Cla002563 ). Considering lncRNAs may act as functional endogenous target mimics of miRNAs, competitive endogenous RNA networks were subsequently constructed, with the most complex one containing three DE-miRNAs, two DE-lncRNAs, and 21 DEGs. Collectively, these findings not only contribute to a better understanding of genetic regulatory networks underlying male sterility in watermelon, but also provide valuable candidates for future research.
Type of Medium:
Online Resource
ISSN:
1664-462X
DOI:
10.3389/fpls.2023.1138415
DOI:
10.3389/fpls.2023.1138415.s001
DOI:
10.3389/fpls.2023.1138415.s002
DOI:
10.3389/fpls.2023.1138415.s003
DOI:
10.3389/fpls.2023.1138415.s004
DOI:
10.3389/fpls.2023.1138415.s005
DOI:
10.3389/fpls.2023.1138415.s006
Language:
Unknown
Publisher:
Frontiers Media SA
Publication Date:
2023
detail.hit.zdb_id:
2613694-6
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