Melatonin Induces Parthenocarpy by Regulating Genes in Gibberellin Pathways of 'Starkrimson' Pear (Pyrus communis L.)

Frontiers in Plant Science
Jianlong LiuLingfei Xu

Abstract

Parthenocarpy, the production of seedless fruit without fertilization, has a variety of valuable qualities, especially for self-incompatible species, such as pear. To explore whether melatonin (MT) induces parthenocarpy, we used 'Starkrimson' pear as a material for morphological observations. According to our results, exogenous MT promoted the expansion and division of the mesocarp cells in a manner similar to hand pollination. However, the seeds of exogenous MT-treated fruit were undeveloped and aborted later in the fruit-setting stage. To further investigate how MT induced parthenocarpy, we studied changes of related hormones in the ovaries and found that MT significantly increased the contents of the gibberellins (GAs) GA3 and GA4. Thus, paclobutrazol (PAC), a GA-biosynthesis inhibitor, was used to study the relationship between GAs and MT. In addition, spraying MT after treatment with PAC did not increase GA content nor lead to parthenocarpy. Through a transcriptome analysis, we discovered that MT can cause significant upregulation of PbGA20ox and downregulation of PbGA2ox. However, no significant difference was observed in PbGA2ox compared with the control after PAC and MT applications. Thus, MT induces parthenocarpy by pr...Continue Reading

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Citations

Mar 7, 2020·Frontiers in Plant Science·Huibin WangLingfei Xu
Apr 8, 2020·Plant Reproduction·M B Arnao, J Hernández-Ruiz
Jun 13, 2020·Frontiers in Plant Science·Ziming MaWenzhu Jiang
Mar 6, 2019·Frontiers in Plant Science·Marina Pérez-LlorcaSergi Munné-Bosch
Oct 31, 2019·International Journal of Molecular Sciences·Xiaoyu TanXiling Zou
Jan 16, 2022·Horticulture Research·Rahat SharifXiaohua Qi

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Methods Mentioned

BETA
transgenic
PCR

Software Mentioned

HTSeq
TopHat
in
ImageJ
Primer Premier
MapMan
cBot Cluster Generation System
house Perl script
DESeq
Bowtie

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