|Table of Contents|

Leaf anatomical characteristics of 11 tree species in the homogeneous habitats of eastern Shandong province hills

Chinese Journal of Applied & Environmental Biology[ISSN:1006-687X/CN:51-1482/Q]

Issue:
2019 03
Page:
655-664
Research Field:
Articles
Publishing date:

Info

Title:
Leaf anatomical characteristics of 11 tree species in the homogeneous habitats of eastern Shandong province hills
Author(s):
CHEN Xu1 LIU Hongkai1 WANG Qiang2 ZOU Hongyang3 ZHU Qiliang1 & WANG Yanping1**
1 Soil Erosion and Ecological Restoration Laboratory of Shandong Province, Forestry College of Shandong Agricultural University, Tai’an 271018, China 2 Shandong Forestry Foreign Investment and Project Management Office, Jinan 250014, China 3 Forest Bureau of Weihai City, Weihai 264200, China
Keywords:
homogeneous habitat arid mountain area leaf anatomical trait tree species selection
CLC:
Q945.78
PACS:
DOI:
10.19675/j.cnki.1006-687x.201808008
DocumentCode:

Abstract:
Leaves serve as important and sensitive organs to environment changes. Leaf anatomical traits reflect the adaptation of trees to some special environments. Eleven co-existing tree species from the common environment of the limestone mountain area in eastern Shandong Province were selected. The seven anatomical traits of leaves and leaf veins were examined and recorded, including the upper epidermis thickness, palisade tissue thickness, spongy tissue thickness, lower epidermis thickness, main vascular diameter, xylem thickness, and phloem thickness. The results showed that the leaves of the 11 tree species were heterofacial and the differentiation of palisade cells and spongy tissues was obvious in the leaf cross section. The leaf epidermis thickness did not show significant differences among tree species; however, the upper epidermis thickness was generally larger than the lower epidermis thickness. The average thickness of the upper epidermis of the 11 species was 34.66 μm and the average thickness of the lower epidermis was 17.87 μm. The average thickness of leaf epidermis did not show obvious differences among arbor, shrubs, or vines. The obvious palisade tissues in all 11 tree species, although spongy tissues were arranged sparsely, could be considered an important index for the tolerance assessment of tree species to the arid environment. The average ratio of palisade tissue thickness to spongy tissue thickness of the 11 species was 2.42. Regarding the leaf vein anatomy, the ratios of xylem and phloem thickness in leaf veins were 1.43–5.30, showing significant differences among the 11 tree species. However, the ratios in three life type, arbor, shrub, and vine, did not differ. There were significant correlations among leaf vein diameter, xylem thickness, and phloem thickness in the vein (P < 0.01). To a certain extent, the ratios of palisade tissues and spongy tissue thickness, the xylem thickness in leaf vein might serve as important indices for the tolerance assessment of tree species to the arid environment. This study shows some relative characteristics of leaves to arid habitats according to leaf anatomical traits, which would provide some references for the selection of tree species for the vegetation restoration in arid limestone mountain areas in the future.

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