Systematic Study On The Plant Of Polygonum In Polygonum

Aconogonon group of plants usually perennial herbs or subshrubs, adapt wet or arid habitats, the main producing area of the northern hemisphere temperate forests, especially in mountainous areas, extending to the tropical and subtropical sub-alpine or alpine zone.1826, Aconogonon first broadly defined as a group of Polygonum genus by Meisn,Polygonum section Aconogonon, which includes about 25 to 30 species of plants, many scholars have also been a lot of research, but in their taxonomic status, dividing Range boundaries, there has been controversy on the group under classification system and certain types of difficult issues such as school location. Such as in the 1837 Reichenback regard group sect.Aconogonon as the Polygonum upgraded to bifurcation Aconogonon. Wu Zhengyi and some foreign scholars also support the view Reichenback group promoted the bifurcation Polygonum genus level, Gross(1913) according to ocrea ciliate, achenes three prismatic features such as bifurcation Polygonum group will go in the spring of P. Persicaria, Ronse Decraene & Akeroyd(1988) based on morphological characteristics of flowers that feature bifurcation Polygonum group division is not clear enough, agree Goss(1913) put it into perspective genus P.persicaria.In this paper, the molecular biology of the species groups were part of Polygonum system studies and exploration results are as follows1、PhylogenyBased on rbcl, ITS and trn L-F gene selection C.Caryophyllaceae as outgroup, using Mega contribution method to examine the systematic position. Final results were as follows⑴Polygonum polystachyum and is very different from a separate genus sect.Aconogonon group of plants⑵、Koenigia islandica will be classified as Polygonum polystachyum genus⑶、Phylogenetic analysis based on the discovery of the tooth and leaves Polygonum multiflorum can vary greatly together and can be removed from the fleece-flower root, the individual as a group⑷Polygonum wallichii and sect.Aconogonon also has some similarities, combining morphological and molecular data show the study group of plants Polygonum wallichii placed in sect.Aconogonon group...