Dataset Information

Histological, hormonal and transcriptomic reveal the changes upon gibberellin-induced parthenocarpy in pear fruit.

ABSTRACT: Phytohormones play crucial roles in fruit set regulation and development. Here, gibberellins (GA4+7), but not GA3, induced pear parthenocarpy. To systematically investigate the changes upon GA4+7 induced pear parthenocarpy, dynamic changes in histology, hormone and transcript levels were observed and identified in unpollinated, pollinated and GA4+7-treated ovaries. Mesocarp cells continued developing in both GA4+7-treated and pollinated ovaries. In unpollinated ovaries, mesocarp cells stopped developing 14 days after anthesis. During fruit set process, GA4+7, but not GA1+3, increased after pollination. Abscisic acid (ABA) accumulation was significantly repressed by GA4+7 or pollination, but under unpollinated conditions, ABA was produced in large quantities. Moreover, indole-3-acetic acid biosynthesis was not induced by GA4+7 or pollination treatments. Details of this GA-auxin-ABA cross-linked gene network were determined by a comparative transcriptome analysis. The indole-3-acetic acid transport-related genes, mainly auxin efflux carrier component genes, were induced in both GA4+7-treated and pollinated ovaries. ABA biosynthetic genes of the 9-cis-epoxycarotenoid dioxygenase family were repressed by GA4+7 and pollination. Moreover, directly related genes in the downstream parthenocarpy network involved in cell division and expansion (upregulated), and MADS-box family genes (downregulated), were also identified. Thus, a model of GA-induced hormonal balance and its effects on parthenocarpy were established.

SUBMITTER: Liu L

PROVIDER: S-EPMC5798812 | biostudies-other | 2018

REPOSITORIES: biostudies-other

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Histological, hormonal and transcriptomic reveal the changes upon gibberellin-induced parthenocarpy in pear fruit.

Liu Lulu L Wang Zhigang Z Liu Jianlong J Liu Fengxia F Zhai Rui R Zhu Chunqin C Wang Huibin H Ma Fengwang F Xu Lingfei L

Horticulture research 20180103

Phytohormones play crucial roles in fruit set regulation and development. Here, gibberellins (GA4+7), but not GA3, induced pear parthenocarpy. To systematically investigate the changes upon GA4+7 induced pear parthenocarpy, dynamic changes in histology, hormone and transcript levels were observed and identified in unpollinated, pollinated and GA4+7-treated ovaries. Mesocarp cells continued developing in both GA4+7-treated and pollinated ovar ...[more]

PMID: 29423231

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Dataset Information

Histological, hormonal and transcriptomic reveal the changes upon gibberellin-induced parthenocarpy in pear fruit.

Publications

Histological, hormonal and transcriptomic reveal the changes upon gibberellin-induced parthenocarpy in pear fruit.

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