Journal of Guangxi Normal University(Natural Science Edition) ›› 2018, Vol. 36 ›› Issue (1): 142-148.doi: 10.16088/j.issn.1001-6600.2018.01.021

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Systematic Significance of Leaf Morphology in Plagiogyriaceae

ZHAO Hang,WANG Renxiang*,LIU Ling   

  1. College of Life Sciences,Guangxi Normal University,Guilin Guangxi 541006,China
  • Received:2017-06-12 Online:2018-01-20 Published:2018-07-17

Abstract: Leaf epidermises of 14 taxa,representing Plagiogyriaceae and its related taxa,were examined by light microscopy (LM) and scanning electron microscopy (SEM) to determine the systematically informative characters. The 14 taxa include 9 species of Plagiogyriaceae (Plagiogyria adnata,P.assurgens,P. euphlebia,P. falcata,P. glauca,P. japonica,P. matsumureana,P. pycnophylla and P. stenoptera),4 species of Cyatheaceae (Alsophila austro-yunnanensis, Gymnosphaera khasyana,G. spinulosa and Sphaeropteris brunoniana) and 1 Dicksoniaceae species of Cibotium barometz. The results show that the leaf epidermal cells are usually irregular in shape. The patterns of anticlinal walls sinuous and sinuate. There are wax granules on the epidermiese of Plagiogyria assurgens,P. glauca,Sphaeropteris brunoniana,and Cibotium barometz. The stomatal apparatuses were restricted in abaxial epidermises for all species,and could generally be assigned to polocytic,axillocytic,aisocytic,anomotetracytic,anomocytic,diacytic,and pericytic types. Based on the results of leaf micromorphology, the taxonomic and systematic positions of Plagiogyriaceae were discussed.

Key words: Plagiogyriaceae;Cyatheaceae;Dicksoniaceae;type of stomatal apparatuses, related taxa

CLC Number: 

  • Q949
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