中国南方红树林内生拟盘多毛孢资源及多样性-研究

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1、目录wasnosignificantdifferenceofthecolonizationfrequenciesofendophyticPestalotiopsisinBruguieragymnorrhizaofGuangdong,GuangxiandHainan.ColonizationfrequenciesofendophyticPestalotiopsisvariedwithdifferentfamilesofhostplants.Forexample,ColonizationfrequenciesofendophyticPestalotiopsisinKandeli

2、acandelandSonneratiacaseolarisinHainanwas8.9%,butnoendophyticPestalotiopsiswereisolatedfromAvicenniamarianainHainan.ThecolonizationinKandeliacandelofGuangxiwashigherthanothermangroveplants,whichwas20%.ThespeciesdiversityofendophyticPestalotiopsisiscloselyrelatedwiththeirhostplantsandthepla

3、ceofplants.27speciesofendophyticPestalotiopsiswereisolatedfrom10familesofhostplantsinHainan,12speciesofendophyticPestalotiopsiswereisolatedfrom4familesofhostplantsinGuangdong,18speciesofendophyticPestalotiopsiswereisolatedfrom7familesofhostplantsinGuangxi,but3speciesinBruguieragymnorrhiza,

4、1speciesinAvicenniamariana.RichnessindexofendophyticPestalotiopsishadnocorrelationwithShannon-Wienerindex,buthadcloselycorrelationwithevennessindex.3.TaxonomiccharactersofthegenusPestalotiopsisBycomparisonoftaxonomiccharacters‘sstabilityoftheconidiaondifferentdaysandalsofromdifferentasexua

5、lgengrations,Thelengthandwidthofconidiaandthelengthofapicalappendageswererelativelystablesothattheycouldbeusedastaxonomiccharacters.ThepigmentationofmediancellsofconidiainPestalotiopsisspecieswasnotstableondifferentdays.4.MolecularphylogeneticsofPestalotiopsisAmolecularphylogenetictreewasg

6、eneratedwithITSregions(ITS1,5.8SandITS2)andbeta-tubulin2gene(tub2)of76Pestatotiopsisstrainsbelongingto29species.PestalotiopsisstrainswerefirstlydividedintotwobranchesXandY：‗‗umbertofuliginous‖asingroupX,‗‗browntoolivaceous‖asingroupsY.Xbranchwasfurtherdividedinto2obvioussubbranches(aandb)，

7、bsubbranchincludedPestalotiopsisspecieswithknobbedapicalappendages，hutadidnotinclude.Ybranchwasfurtherdividedinto2subbranehes(candd)，Allstrainsofdsubbrancheweredifferentinthelengthofconidia．Accordingtothephylogenetictree,ThelengthIV万方数据目录andwidthofconidiaandth