Auxin regulation and MdPIN expression during adventitious root initiation in apple cuttings

作     者：Ling Guan Yingjun Li Kaihui Huang Zong-Ming(Max)Cheng Ling Guan;Yingjun Li;Kaihui Huang;Zong-Ming(Max)Cheng

作者机构：College of HorticultureNanjing Agricultural University210095 NanjingChina Institute of PomologyJiangsu Academy of Agricultural SciencesJiangsu Key Laboratory for Horticultural Crop Genetic Improvement210014 NanjingChina Department of Plant SciencesUniversity of TennesseeKnoxvilleTN 37831USA 

出 版 物：《Horticulture Research》 (园艺研究（英文）)

年 卷 期：2020年第7卷第1期

页      面：955-966页

核心收录：

学科分类：09[农学] 0902[农学-园艺学] 090201[农学-果树学] 

基　　金：supported by the National Natural Science Foundation of China(Grant no.31601738) 

主　　题：hydrolysis elite dwarf 

摘      要：Adventitious root(AR)formation is critical for the efficient propagation of elite horticultural and forestry *** decades of research,the cellular processes and molecular mechanisms underlying AR induction in woody plants remain *** examined the details of AR formation in apple(Malus domestica)M.9 rootstock,the most widely used dwarf rootstock for intensive production,and investigated the role of polar auxin transport in postembryonic *** formation begins with a series of founder cell divisions and elongation of the interfascicular cambium adjacent to vascular *** process is associated with a relatively high indole acetic acid(IAA)content and hydrolysis of starch *** auxin treatment promoted this cell division,as well as the proliferation and reorganization of the endoplasmic reticulum and Golgi *** contrast,treatment with the auxin transport inhibitor N-1-naphthylphthalamic acid(NPA)inhibited cell division in the basal region of the cuttings and resulted in abnormal cell divisions during the early stage of AR *** addition,PIN-FORMED(PIN)transcripts were differentially expressed throughout the whole AR development *** also detected upregulation of MdPIN8 and MdPIN10 during induction;upregulation of MdPIN4,MdPIN5,and MdPIN8 during extension;and upregulation of all MdPINs during AR *** research provides an improved understanding of the cellular and molecular underpinnings of the AR process in woody plants.