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Anatomy of the Korean mistletoe and their haustorial features in host plants  

Choi, Kyung (National Arboretum)
Park, Kwang-Woo (National Arboretum)
Kim, Hyuk-Jin (National Arboretum)
Lee, Jae-Dong (Division of Science Education, Chonbuk National University)
Koo, Jachoon (Division of Science Education, Chonbuk National University)
Whang, Sung-Soo (Division of Science Education, Chonbuk National University)
Publication Information
Korean Journal of Plant Taxonomy / v.39, no.1, 2009 , pp. 4-11 More about this Journal
Abstract
Anatomical features of both leaves and stems of the four mistletoes in Korea (Viscum album var. coloratum, Korthalsella japonica, Loranthus yadoriki, L. tanaka) and of their secondary haustorial structure within several host plants were investigated. Among the four mistletoes, there were diagnostic characters of the anatomy of leaves and stems which enabled us to distinguish the four taxa. Leaves were observed to have three distinct characters including unifacial or bifacial leaves, the number of vascular bundles in the midveins, and the level of development of sclerenchyma cells. There were four diagnostic characters of stems: overall morphology of stems in transverse view, degree of cuticle development, arrangement of vascular bundles, and features of the sclerenchyma and pith. In order to determine secondary haustorial traits, the research focused on the seven host plants of L. yadoriki and on the five host plants of K. japonica. The following features were found to be important: presence or absence of an aerial runner root, the shape of the haustorial strand and flange, the degree of penetration into host tissues, and their development of shaft in transverse view, the development both of secondary haustorial cells and short tracheid in hyphae. Korthalsella japonica and L. yadorki were clearly distinguished by these characters. The secondary haustorial forms in each host were somewhat different, due to varying degrees of development in the strength of the host plants' wood. However, qualitative characters like the final position of the secondary haustorial penetration into host tissues and the development of short tracheid cells were not only affected by the degree of development of the host plants, but also useful for the systematic study.
Keywords
Loranthaceae; host plant; anatomy; systematics;
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Times Cited By KSCI : 2  (Citation Analysis)
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