Tomato SIBL4 plays an important role in fruit pedicel organogenesis and abscission  

作　　者：Fang Yan Zhehao Gong Guojian Hu Xuesong Ma Runyao Bai Ruonan Yu Qiang Zhang Wei Deng Zhengguo Li Hada Wuriyanghan 

机构地区：[1]Key Labo rato ry of Her bage&En demic Crop Biotech no logy,Ministry of Education,School of Life Science,Inner Mongolia University,Hohhot 010021,China [2]Key Lab oratory of Pla nt Hormones and Developme nt Regulati on of Chongqing,School of Life Sciences,Chongqing University,401331 Chongqing,China [3]School of Biology and Basic Medical Sciences,Soochow University,Suzhou,China [4]Center of Plant Functional Genomics,Institute of Advanced Interdisciplinary Studies,Chongqing University,401331 Chongqing,China

出　　处：《Horticulture Research》2021年第1期1094-1108,共15页园艺研究（英文）

基　　金：the National Natural Science Foundation of China(31601763 and 31972470);the Inner Mon golia Univer sity High-Level Tale nt Research Program(12000-15031934).

摘　　要：Abscission,a cell separation process,is an important trait that in fluences grain and fruit yield.We previously reported that BEL1-LIKE HOMEODOMAIN 4(SIBL4)is involved in chloroplast development and cell wall metabolism in tomato fruit.In the present study,we showed that silencing SIBL4 resulted in the enlargement and pre-abscission of the tomato(Solanum lycopersicum cv.Micro-TOM)fruit pedicel.The anatomic analysis showed the presence of more epidermal cell layers and no obvious abscission zone(AZ)in the SlBL4 RNAi lines compared with the wild-type plants.RNA-seq analysis indicated that the regulation of abscission by SlBL4 was associated with the altered abundance of genes related to key meristems,auxin transporters,signaling components,and cell wall metabolism.Furthermore,SlBL4 positively affected the auxin concentration in the abscission zone.A dual-luciferase reporter assay revealed that SlBL4 activated the transcription of the JOINTLESS,OVATE,PIN1,and LAX3 genes.We reported a novel function ofSlBL4,which plays key roles in fruit pedicel organogenesis and abscission in tomatoes.

关 键 词：metabolism dic separation 

分 类 号：S641.2[农业科学—蔬菜学]