李梦怡,李炎林,许璐,冯烨,甘德欣,于晓英?.红花槭扦插生根特性和解剖学研究[J].湖南农业大学学报:自然科学版,2019,45(4):.
红花槭扦插生根特性和解剖学研究
  
DOI:
中文关键词:  红花槭  插穗类型  扦插基质  吲哚丁酸  萘乙酸  解剖学
英文关键词:Acer rubrum  cutting types  cutting substrates  IBA  NAA  anatomy
基金项目:湖南省科技计划项目(2018TP2007);湖南省科学技术厅重点研发计划项目(2016NK2100);长沙市城市管理和行政执法局项目(17191);湖南农业大学“双一流”建设项目 (SYL201802026)
作者单位
李梦怡,李炎林,许璐,冯烨,甘德欣,于晓英? 1.湖南农业大学园艺园林学院湖南 长沙 4101282.湖南省中亚热带优质花木繁育与利用工程技术中心湖南 长沙 410128 
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中文摘要:
      以红花槭‘十月光辉’1年生带顶芽、1年生无顶芽和2年生硬枝为插穗,选用M1(河沙与珍珠岩的体积比为1∶1)、M2(河沙与蛭石的体积比为1∶1)、M3(珍珠岩与蛭石的体积比为1∶1)和M4(河沙、珍珠岩、蛭石的体积比为1∶1∶1)4种不同的扦插基质,施加不同质量浓度的吲哚丁酸(IBA)和萘乙酸(NAA)进行扦插试验,研究插穗类型、基质种类和外源激素对红花槭扦插生根的影响,并对扦插过程中不定根发育形成过程进行组织学观察。结果表明:M4基质在生根率(69.44%)、平均生根数量(14.31条)和平均根长(5.40 cm)方面均表现最优,为适宜的扦插基质;1年生插穗生根率和平均根数均高于2年生插穗的,平均根长低于2年生插穗的;1年生带顶芽与1年生无顶芽插穗的扦插生根率差异不显著(P<0.05);500 mg/L IBA+500 mg/L NAA 处理效果最好,生根率达75.56%,平均生根数量为15.68条,平均根长为6.48 cm。红花槭属于诱生根原基多位点发生类型,其不定根起源于木射线与维管形成层交叉区域和韧皮部薄壁组织。
英文摘要:
      In this study, three cuttings, 1-year-old with terminal bud, 1-year-old without terminal bud and 2-year- old hard branches of Acer rubrum ‘October Glory’, each were applied four types of cutting substrates, named M1 (equal volume of sand and perlite), M2 (equal volume of sand and vermiculite), M3 (equal volume of perlite and vermiculite) and M4 (equal volume of sand and perlite and vermiculite) separately, as well as applied IBA and NAA at different mass concentration ratios. The effects of cutting type, substrate type and exogenous hormones on rooting, the histological observation of adventitious root formation during cutting process were investigated. Results showed that M4 matrix was the most suitable cutting substrate showing the best rooting rate (69.44%), average rooting number (14.31) and average root length (5.40 cm). The 1-year-old cuttings showed higher rooting rate and average number of roots but lower average root length than the 2-years-old cuttings. And, the difference of rooting rate between 1-year-old with terminal bud and 1-year-old without terminal bud cuttings was not significant (P<0.05). The combination of 500 mg/L IBA+500 mg/L NAA was the best application in rooting of cuttings,with the rooting rate 75.56%, the average rooting number 15.68, and the average root length 6.48 cm. The adventitious roots of Acer rubrum are derived from the cross areas of the xylem rays with the vascular cambium and phloem parenchyma, which belongs to the induced root primordia of multilocus type.
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