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Sains Malaysiana 43(8)(2014): 1119–1125
Effect
of Elevation and Canopy Condition on Morphological Traits and Leaf Fluctuating
Asymmetry of a Bamboo, Chimonobambusa utilis in Jinfo Mountain Nature
Reserve, Southwest China
(Kesan Ketinggian dan Keadaan Kanopi ke atas Sifat Morfologi dan
Asimetri Turun-Naik Daun Buluh, Chimonobambusa utilis di Gunung Simpan
Semula Jadi Jinfo, Barat-daya China)
QING-YU LI1, ZHUO-WEN ZHANG2, JIAN-PING TAO3, JIANG-HUA LIU2, XIAO-HUI YONG2, XUE-FENG MENG2, ZHEN LI2 & YONG-JIAN WANG2*
1College of Urban Planning and Environmental
Science, Xuchang University
Xuchang 461000, China
2College of Horticulture & Forestry Sciences, Huazhong
Agricultural University
Wuhan 430070, China
3Key Laboratory of Eco-environments of Three Gorges Reservoir
Region (Ministry of Education)
School of Life Sciences, Southwest University, Chongqing
400715, China
Diserahkan: 27 Ogos 2013/Diterima: 5 November
2013
ABSTRACT
Due to widespread distribution of dwarf bamboo, Chimonobambusa utilis, in mountain
environment, the effects of elevation (low and high) and canopy condition
(forest understorey and forest edge) on the clonal morphology and leaf
fluctuating asymmetry were investigated in an evergreen broadleaves forest of
Jinfo Mountain Nature Reserve. Elevation and canopy condition were significant
for all morphological traits of C. utilis (except for effect of
elevation on node number under branch). Traits of clonal morphology such as
height, basal diameter, height under branch tended to
be higher in forest understorey and in high elevation. Forest understorey in
high elevation was favour of shooting number. Interaction of elevation and
canopy conditions had a significant effect on growth of node. Single leaf area
(SLA)
and all indices of fluctuating asymmetry were significantly higher in low
elevation than that in high elevation of forest understorey. Thus, elevation
and canopy condition formed environmental stress that lead to the adaptation of
morphological traits and leaf fluctuating asymmetry of C. utilis populations
to mountain forest habitats.
Keywords: Chimonobambusa
utilis; evergreen broadleaves forest; fluctuating asymmetry; morphological
traits; specific leaf area
ABSTRAK
Disebabkan oleh taburan meluas buluh kerdil, Chimonobambusa utilis dalam persekitaran
gunung, kesan ketinggian (rendah dan tinggi) dan keadaan kanopi (hutan bawah
kanopi dan tepi hutan) pada morfologi klon dan asimetri turun-naik daun telah
dikaji dalam hutan malar hijau daun besar di Gunung Simpan Semula Jadi Jinfo. Ketinggian dan keadaan kanopi adalah penting bagi semua ciri
morfologi C. utilis (kecuali kesan
ketinggian pada bilangan buku di bawah dahan). Ciri morfologi klon
seperti ketinggian, diameter bes, ketinggian di bawah
dahan cenderung untuk menjadi lebih tinggi di dalam hutan bawah kanopi dan
ketinggian tinggi. Hutan bawah kanopi dalam ketinggian tinggi
adalah memihak kepada bilangan pucuk. Interaksi
ketinggian dan kanopi keadaan mempunyai kesan yang besar ke atas pertumbuhan
buku. Keluasan daun tunggal (SLA)
dan semua indeks turun naik ketidakseimbangan adalah lebih tinggi pada
ketinggian yang rendah berbanding di ketinggian tinggi bawah kanopi hutan. Oleh itu, ketinggian dan keadaan kanopi membentuk tekanan
alam sekitar yang membawa kepada ubahsuaian ciri morfologi dan asimetri
turun-naik daun C. utilis bagi populasi
habitat hutan gunung.
Kata kunci: Chimonobambusa utilis; hutan malar hijau daun besar; keluasan
daun khusus; sifat morfologi; turun naik asimetri
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