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- Title
Changes of Leaf Morphological, Anatomical Structure and Carbon Isotope Ratio with the Height of the Wangtian Tree ( Parashorea chinensis) in Xishuangbanna, China.
- Authors
He, Chun‐Xia; Li, Ji‐Yue; Zhou, Ping; Guo, Ming; Zheng, Quan‐Shui
- Abstract
Leaf morphological and anatomical structure and carbon isotope ratio (δ13C) change with increasing tree height. To determine how tree height affects leaf characteristics, we measured the leaf area, specific leaf mass (ratio of leaf mass to leaf area [LMA]), thickness of the total leaf, cuticle, epidermis, palisade and sponge mesophyll, stomata traits and δ13C at different heights of Parashorea chinensis with methods of light and scanning electron microscopy (SEM) and isotope-ratio mass spectrometry. The correlation and stepwise regression between tree height and leaf structure traits were carried out with SPSS software. The results showed that leaf structures and δ13C differed significantly along the tree height gradient. The leaf area, thickness of sponge mesophyll and size of stomata decreased with increasing height, whereas the thickness of lamina, palisade mesophyll, epidermis, and cuticle, ratios of palisade to spongy thickness, density of stomata and vascular bundles, LMA and δ13C increased with tree height. Tree height showed a significant relationship with all leaf indices and the most significant relationship was with epidermis thickness, leaf area, cuticle thickness, δ13C. The δ13C value showed a significantly positive relationship with LMA ( R = 0.934). Our results supported the hypothesis that the leaf structures exhibited more xeromorphic characteristics with the increasing gradient of tree height.
- Subjects
CHINA; CARBON isotopes; LEAF anatomy; EPIDERMIS; SCANNING electron microscopy
- Publication
Journal of Integrative Plant Biology, 2008, Vol 50, Issue 2, p168
- ISSN
1672-9072
- Publication type
Article
- DOI
10.1111/j.1744-7909.2007.00620.x