八棱海棠和湖北海棠的耐盐性分析 八棱海棠树
摘要。通过组织培养获得两个苹果砧木八棱海棠(MalusrobustaRehd.)和湖北海棠[Malushupehensis(Pamp.)Rehd.]的试管苗,并以不同浓度的NaCl作为盐胁迫因子,加入生根培养基中进行耐盐性试验。结果表明,在盐胁迫的30d内,试管苗的生根率、生根数目均随着盐浓度的升高而降低,试管苗的受害指数随着盐浓度的升高而增大。在4g/lNaCl胁迫下,随着盐胁迫时间的延长,试管苗的受害率和受害指数呈上升趋势。八棱海棠耐盐能力大于湖北海棠。
关键词:苹果砧木;耐盐性;比较分析
中图分类号:S661.4;Q945.78文献标识码:A文章编号:0439-8114(2011)09-1826-03
ComparingAnalysisofSaltTolerancebetweenMalusrobustaandM.hupehensis
CHENWei-ping,fengjin-xia,kongling-na
(CollegeofAgriculture,NanjingAgriculturalUniversity,Nanjing210095,China)
Abstract:Twoapplerootstocksplantletsinvitro[MalusrobustaRehd.andM.hupehensis(Pamp.)Rehd.]wereobtainedthroughtissueculture.ThesalttoleranceofM.micromalusandM.hupehensiswastestedinMSmediumcontainingdifferentcontentofNaCl.TheresultsshowedthatunderNaClstress,therootingrateandthenumberofrootoftheplantletsdecreasedalongwiththeincreaseofsalinitylevelintheculturemedium;andtheinjuryindexesincreasedwiththesalinitylevelin30days.Under4g/lNaClstress,withtheincreaseoftreatmenttime,theinjurypercentageandinjuryindexgraduallyincreased.AndthestudyindicatedthatthesalttoleranceofM.romaluswasstrongerthanthatofM.hupehensis.
Keywords:Applerootstocks;Salttolerance;comparinganalysis
(未完,全文共4977字,当前显示1165字)
(请认真阅读下面的提示信息)