Welcome to Journal of University of Chinese Academy of Sciences，Today is
RSS 中文

Previous Articles     Next Articles

Micromorphology of Leaf Epidermis of Chimonobambusa (Bambusoideae)

Chen Xiao-ya, Hu Cheng-hua, Yu Fu-geng, Ruan Ja-peng   

  • Received:1900-01-01 Revised:1900-01-01 Online:1993-05-18 Published:1993-05-18
  • Contact: Chen Xiao-ya

Abstract:

 Micromorphological characters of leaf epidermis of 27 published species
of Chimonobambusa Makino were examined by both light and scanning electron
microscopes (Table 1). On the adaxial surface, bulliform cells are of irregular or
tetragonal shape and in 2-- 3 rows between veins;  stomata rare. On the abaxial
surface, intercostal long cells are of thin and sinuous wall;  short cells solitary,
paired, or 3 to several in a row on veins;  silica bodies narrow tall or saddle
like;  bicellular hairs common, with the basal cell slightly longer than or as long
as the distal cell;  hooks elliptic and apiculate, common in some species and rare
in the others;  papillae numerous, those overarching stomata showing different pat-
terns (Plates 1, 2). The examined species exhibit three types of leaf epidermis
(Table 2 ): 1, papillae widely spread, 4 rod- like papillae overarching the indi-
vidual stomata, hooks common, including all the six examined species of Sect.
Qiongzhuea and 9 species of Sect.  Oreocalamus;  2, papillae around stomata
only (with the exception of C. microfloscula), the 4 papillae branched or curved,
plus several small ones, forming an arciform cover over the individual stomata,
hooks sparse, including 7 species of Sect. Oreocalamus and 1 species of Sect.
Chimonobambusa;  3, papillae overarching stomata intermediate between the other
two types, with the other characters similar to type 1, including 2 species of
Sect. Chimonobambusa and 2 species of Sect. Oreocalamus. The three types more
or less correspond to the current classification of the genus based on gross
morphology, but since Sect. Oreocalamus showed all the three types and type 3
was somewhat intermediate between the other two, present data support a broad
sense  of the  genus  Chimonobambusa,  and  the  three  sections  proposed  by
Ohrnberger (1990) are to some extent acceptable.  The results support the
removing of C.  luzhiensis from Sect.  Qiongzhuea, but reassignment of C.
metuoensis to Sect.  Qiongzhuea cannot be confirmed.  In addition,  the leaf
epidermis is of diagnostic value at species level. The data support the inclusion of
C. linearifolia in C. angustifolia, but do not support that of C. rivularis in C.
lactistriata, nor of C. yunnanensis and C. tuberculata in C. armata (Ohrnberger,
1990). In fact, C. yunnanensis, C. tuberculata and C. lactistriata, in addition
to  C.  hirtinoda,  are  similar to  C.  qudrangularis in  both  leaf and  gross
morphological characters;  so is C. pachystachys to C. utilis, C. neopurpurea to
C. marmorea, and maybe C. rigidula to C. szechuanensis. They are possibly sis-
ter-species.or even conspecific, respectively.
     The various specific papillate patterns are characteristic of bamboo taxa, and
investigation of wider samples will be of great interest in bamboo systematics.

Key words: Chimonobambusa, Bambusoideae, Leaf, Micromorphology

Copyright © Journal of University of Chinese Academy of Sciences

Support by Beijing Magtech Co.ltd support@magtech.com.cn