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A systems genetics approach reveals PbrNSC as a regulator of lignin and cellulose biosynthesis in stone cells of pear fruit

文献类型： 外文期刊

作者： Wang, Runze 1 ; Xue, Yongsong 1 ; Fan, Jing 2 ; Yao, Jia-Long 3 ; Qin, Mengfan 1 ; Lin, Tao 4 ; Lian, Qun 4 ; Zhang, Ming 1 ;

作者机构： 1.Nanjing Agr Univ, Coll Hort, State Key Lab Crop Genet & Germplasm Enhancement, Nanjing 210095, Peoples R China

2.Hubei Acad Agr Sci, Inst Fruit & Tea, Wuhan 430072, Peoples R China

3.New Zealand Inst Plant & Food Res Ltd, Auckland 1025, New Zealand

4.Chinese Acad Agr Sci, Agr Genom Inst Shenzhen, Genome Anal Lab, Minist Agr, Shenzhen 518124, Peoples R China

5.China Agr Univ, Coll Hort, Beijing 100083, Peoples R China

6.Shandong Agr Univ, Coll Hort Sci & Engn, State Key Lab Crop Biol, Tai An 271018, Shandong, Peoples R China

7.Fujian Agr & Forestry Univ, Hort Plant Biol & Metabol Ctr, Haixia Inst Sci & Technol, Fuzhou 350002, Peoples R China

8.Cornell Univ, Boyce Thompson Inst, Ithaca, NY 14853 USA

9.USDA ARS, Robert W Holley Ctr Agr & Hlth, Ithaca, NY 14853 USA

关键词： Pear fruit; Co-expression network; eQTL; Stone cell formation; NAC transcription factor; Transcriptional regulation

期刊名称：GENOME BIOLOGY （ 影响因子：13.583； 五年影响因子：17.433 ）

ISSN： 1474-760X

年卷期： 2021 年 22 卷 1 期

页码：

收录情况： SCI

摘要： Background Stone cells in fruits of pear (Pyrus pyrifolia) negatively influence fruit quality because their lignified cell walls impart a coarse and granular texture to the fruit flesh. Results We generate RNA-seq data from the developing fruits of 206 pear cultivars with a wide range of stone cell contents and use a systems genetics approach to integrate co-expression networks and expression quantitative trait loci (eQTLs) to characterize the regulatory mechanisms controlling lignocellulose formation in the stone cells of pear fruits. Our data with a total of 35,897 expressed genes and 974,404 SNPs support the identification of seven stone cell formation modules and the detection of 139,515 eQTLs for 3229 genes in these modules. Focusing on regulatory factors and using a co-expression network comprising 39 structural genes, we identify PbrNSC as a candidate regulator of stone cell formation. We then verify the function of PbrNSC in regulating lignocellulose formation using both pear fruit and Arabidopsis plants and further show that PbrNSC can transcriptionally activate multiple target genes involved in secondary cell wall formation. Conclusions This study generates a large resource for studying stone cell formation and provides insights into gene regulatory networks controlling the formation of stone cell and lignocellulose.

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