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Title of Journal: Plant Syst Evol

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Abbravation: Plant Systematics and Evolution

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Springer Vienna

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1615-6110

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New insights into pollen morphology and its implic

Authors: Sangtae Lee Kyoungin Heo Juhee Cho Chunghee Lee Wenli Chen SeungChul Kim
Publish Date: 2010/11/27
Volume: 291, Issue: 3-4, Pages: 227-242
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Abstract

Pollen morphology of 13 species of the genus Sanguisorba Rosaceae was examined by light and scanning electron microscopy The pollen morphology divided the genus into two main groups A tricolporate with tapered colpus tips and B either tricolporate with opened colpus tip or hexacolporate The former group was further subdivided into those without vestibulum A1 S alpina S dodecandra and S filiformis and those with vestibulum A2 S agrimonoides S ancestroides S annua S cretica S minor and S verrucosa whereas the latter group was subdivided into those with colpus narrow and similar to the A1 type B1 S canadensis and S diandra those with colpus and mesocolpus somewhat equally wide and forming hexacolporate aperture B3 S albiflora S armena S media S menziesii S parviflora S stipulata and S tenuifolia and those with colpus intermediate between the B1 and B3 types B2 S hakusanensis S microcephala S obtusa S officinalis S polygama and S sitchensis It is suggested that the A1 type aperture would have evolved to the A2 type as a specialized form and the B types B1 to B3 in a direction in which the hexacolporate aperture was derived Implications of pollen morphology for infrageneric classification of Sanguisorba are discussed and the results are compared with molecular phylogenetic studiesThis paper represents partial fulfillment of an MS degree in Biological Education for the third author JC submitted at Sungkyunkwan University We thank two anonymous reviewers for their helpful comments and suggestions on an earlier draft of the manuscript

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