文献类型： 外文期刊

作者： Zhang, Lumin ¹ ; Kamitakahara, Hiroshi ⁴ ; Takano, Toshiyuki ⁴ ; Morimoto, Takuya ³ ; Sakamoto, Shingo ² ; Mitsuda, Nobutaka ² ; Itai, Akihiro ³ ;

作者机构： 1.Yunnan Acad Agr Sci, Trop Ecoagr Res Inst, Nancheng St 150, Yuanmou 651300, Yunnan, Peoples R China

2.Natl Inst Adv Ind Sci & Technol, Bioprod Res Inst, Cent 6,Higashi 1-1-1, Tsukuba, Ibaraki 3058566, Japan

3.Kyoto Prefectural Univ, Grad Sch Life & Environm Sci, Kitaina Yazuma Oji 74, Seika, Kyoto 6190244, Japan

4.Kyoto Univ, Grad Sch Agr, Div Forest & Biomat Sci, Kitashirakawa Oiwake Cho,Sakyo Ku, Kyoto 6068502, Japan

关键词： Pear and apple; Pedicel lignin; Secondary cell wall biosynthesis; Stone cells; Regulatory mechanism

期刊名称：PLANTA （ 影响因子：4.3； 五年影响因子：4.8 ）

ISSN： 0032-0935

年卷期： 2023 年 258 卷 5 期

页码：

收录情况： SCI

摘要： Fruit pedicels act as bridges between the fruit and the shoot. They have secondary thickened cell walls that presumably function in mechanical support, water and nutrient transport. Stone cells are cells with a secondary cell wall thickening. In pears, yet not in apples, the stone cells affect the flesh texture. There have been few reports on stone cell formation in pear and apple pedicels; therefore, we studied these cells for the first time. The apple pedicel had few stone cells in the cortex. The formation of stone cells in pear continued until seven weeks after flowering (WAF), and the density was significantly higher than in apple. The stone cell formation degree (SFD) of pear was 3.6-7.1 times higher than that of apple. Total lignin and lignin non-condensed structure (G and S units) content in the pear pedicle outer part was 1.5-2.7 times higher than that of the apple at harvest. The SFD of the pedicel outer part had a positive correlation with the G and S units content of the flesh. The total lignin and G and S units content between flesh and the pedicel outer part were positively correlated. Correlation analysis revealed a positive relationship between fruit and pedicel formation of the stone cells. The WGCNA showed that NST3 was linked to NAC028, MYB46, CESA, POD, LAC, and VSR6. These genes were highly expressed in the outer part of the pear pedicel, while they were suppressed in that issue of the apple at 4 WAF.