藜麦嫁接体中嫁接口部位的导管分子形态分析  

Morphological Analysis of Tracheary Elements at the Grafting Interface of Quinoa Grafts

作　　者：刘小芳 曾誉 吴辉艳 梁大成 Liu Xiaofang;Zeng Yu;Wu Huiyan;Liang Dacheng(Hubei Key Laboratory of Waterlogging Disaster and Wetland Agriculture,Engineering Research Center of Ecology and Agricultural Use of Wetland,Ministry of Education,Hubei Collaborative Innovation Center for Grain Industry,Yangtze University,Jingzhou,434025)

机构地区：[1]长江大学湖北省主要粮食作物产业化协同创新中心湿地生态与农业利用教育部工程研究中心湖北省涝渍灾害与湿地农业重点实验室,荆州434025

出　　处：《分子植物育种》2022年第7期2384-2389,共6页Molecular Plant Breeding

基　　金：国家自然科学基金项目(31671257)资助。

摘　　要：本研究旨在探讨藜麦(Chenopodium quinoa Willd.)同源嫁接体在嫁接界面附近的导管分子形态特征变化。为此,本研究用扫描电子显微镜观察了两个藜麦品种(‘白藜’和‘红藜’)嫁接16 d后嫁接接口、砧木和接穗的导管分子形态特征变化。结果表明:嫁接口的导管分子形态各异,导管形态类型包括梯纹、网纹和孔纹等成熟短导管分子;接穗和砧木的导管分子与同时期未嫁接的对照相比,长度明显缩短,分别缩短43.31%和48.15%,直径明显变窄,分别变窄9.81%和13.04%,长度和直径的比值明显变小,分别减小37.06%和40.88%。综上所述,嫁接导致藜麦嫁接体导管分子产生一系列变化,这样的变化可能会降低空穴和栓塞的形成,从而提高导管分子的水分运输效率。The present study aimed to explore the tracheary element(TE)behavior at the grafting interface of quinoa grafts.To do this,the scanning electron microscope(SEM)was used to examine the TE morphology at the grafting interface,rootstock,and scion of two quinoa cultivars(’White quinoa’and’Red quinoa’)at 16 d after graft(DAG).Our results revealed that:(1)The types of TEs at the grafting interface were all belonging to mature TEs,such as scalariform vessel,reticulate vessel,pitted vessel,and they were deformed in shape;(2)The TEs of scions and rootstocks were significantly shortened in length(43.31%and 48.15%,respectively),narrower in diameter(9.81%and13.04%,respectively),and smaller in the ratio of length to diameter(37.06%and 40.88%,respectively)than those of ungrafted materials in the same period.In conclusion,grafting leads to a series of changes in TEs of quinoa grafts,which could reduce the formation of cavitation and embolism,thereby improving the water transport across the grafting union.

关 键 词：藜麦 嫁接 扫描电子显微镜 导管分子 

分 类 号：S519[农业科学—作物学]