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The PcERF5 promotes anthocyanin biosynthesis in red-fleshed pear(Pyrus communis)through both activating and interacting with PcMYB transcription factors

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农业科学学报:英文版 2023年第9期22卷 2687-2704页

作者： CHANG Yao-jun CHEN Guo-song YANG Guang-yan SUN Cong-rui WEI Wei-lin Schuyler S.KORBAN WU Jun College of Horticulture State Key Laboratory of Crop Genetics&Germplasm Enhancement and UtilizationNanjing Agricultural UniversityNanjing 210095P.R.China Department of Natural Resources and Environmental Sciences University of Illinois at Urbana-ChampaignUrbanaIL 61801USA

As there is a strong interest in red-skinned pears,the molecular mechanism of anthocyanin regulation in red-skinned pears has been widely investigated;however,little is known about the molecular mechanism of anthocyanin regulation in red-fleshed pears due to limited availability of such germplasm,primarily found in European pears(Pyrus communis).In this study,based on transcriptomic analysis in red-fleshed and white-fleshed pears,we identified an ethylene response factor(ERF)from P.communis,PcERF5,of which expression level in fruit flesh was significantly correlated with anthocyanin content.We then verified the function of PcERF5 in regulating anthocyanin accumulation by genetic transformation in both pear skin and apple calli.PcERF5 regulated anthocyanin biosynthesis by different regulatory pathways.On the one hand,PcERF5 can activate the transcription of flavonoid biosynthetic genes(PcDFR,PcANS and PcUFGT)and two key transcription factors encoding genes PcMYB10 and PcMYB114.On the other hand,PcERF5 interacted with PcMYB10 to form the ERF5-MYB10 protein complex that enhanced the transcriptional activation of PcERF5 on its target genes.Our results suggested that PcERF5 functioned as a transcriptional activator in regulating anthocyanin biosynthesis,which provides new insights into the regulatory mechanism of anthocyanin biosynthesis.This new knowledge will provide guidance for molecular breeding of red-fleshed pear.

关键词： Pyrus communis red-fleshed anthocyanin biosynthesis PcERF5 PcMYB10/PcMYB114

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Efficient Breeding and Cultivation of Type 2 red-fleshed Apple Cultivars Using a Search System for Suitable Apple Cultivar Combination

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Horticultural Plant Journal 2018年第6期4卷 219-225页

作者： SHOGO Matsumoto LI Tianzhong SHUNGO Otagaki LI Yang BAI Songling Graduate School of Bioagricultural Sciences Nagoya University Laboratory of Fruit Cell and Molecular Breeding China Agricultural University Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology Zhejiang University

As apple possesses self-incompatibility, knowledge of the S-genotypes is very important for apple breeding and cultivation. We investigated the S-RNase genotypes of 13 type 2 red-fleshed apple cultivars and 8 lineages. All of the investigated type 2 red-fleshed apples contained the S3-RNase allele closely linked to the red-fleshed trait. We made a search system for ovule parents to efficiently produce new type 2 red-fleshed cultivars based on the S-RNase allele information(http://www.***.nagoya-u.***.jp/～hort/apple/red/). More than 90% of progenies from crossing a selected white-fleshed ovule parent with a type 2 red-fleshed pollen parent are expected to show the red-fleshed phenotype. We also compiled a database of the S-RNase genotypes of more than 1 000 apple cultivars, including a survey system of cultivar combinations showing those that were fully incompatible, semicompatible and fully compatible, written in Chinese(http://www.***.nagoya-u.***.jp/～hort/apple/ch/) and Japanese(http://www.***.nagoya-u.***.jp/～hort/apple/ja/).

关键词： Malus×domestica type 2 red-fleshed S-RNase genotype cultivar combination self-incompatibility

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