A Study on the Connection of D iversity with Phylogeny of Vessel Perfora tionPla tes of Taxon of Rhododendron Sect. B rachyca lyx Sweet ( Er icaceae)
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1.
College of Art and Landscape of J iangxi Agricultural University, Nanchang 330045 , J iangxi, China
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2.
Chemical and Life Science Department,Normal College of Gannan, Ganzhou 341000, J iangxi, China
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3.
Forestry Academy of J iangxi, Nanchang 330032, J iangxi, China
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4.
The Office of LushanMountain Natural Reserve of J iangxi Province , Lushan 332900 , J iangxi, China
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Received Date:
2007-10-15
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Abstract
The diversity of vessel perforation p lates of p lants is important to understand how the connection ofdiversity of vessel perforation p lates with phylogeny occurs. This information will help us to understand therelationship between diversity of perforation p lates and phylogeny. For this reason , taxon of Sect. B rachycalyx ofRhododendron in the mainland of China were selected as samp les to make a study on the connection. The results ofthe study are as follows : (1) The connection of diversity of vessel perforation p lateswith phylogeny of this taxon ismore p ronounced based on the corresponding analysis of both diversity of vessel perforation p lates and phylogeny.(2) The connection of diversity of perforation p lateswith phylogeny of this taxon is revealed in three ways as follows:the first, typ ical scalariform perforation p late (A1) responds to phylogeny more clearly ; the second, reticulatescalariform perforation p late (B ) responds to phylogeny of infra rank of species ; the third, changes in area ofperforation p lates respond to phylogeny . (3) The method of corresponding analysis by combination of diversity ofperforation p lates with molecular marker sequences will enable a study to offer clear and faithful information forsystemic classification , for examp le , the results of the study suggest that species Rhododend ron daiyuenshanicum Tam should be treated as an infra rank of species. (4) The method of corresponding analysiswith molecularmarkersequences is the best way to get definite direction of evolution of perforation p lates of p lants and it suggests thatevolution of perforation p lates of Rhododendron Sect. B rachycalyx is responding to phylogeny of this taxon.
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