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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*Pengarang untuk surat-menyurat; email: wangyj@mail.hzau.edu.cn