Drought resistance evaluation based on leaf anatomical structures of 25 shrubs on the Tibetan Plateau

PAN Xin; QIU Quan; LI Jiyue; WANG Junhui; HE Qian; SU Yan; MA Jianwei; DU Kun

doi:10.7671/j.issn.1001-411X.2015.02.011

Journal of South China Agricultural University > 2015 > 36(2): 61-68. > DOI: 10.7671/j.issn.1001-411X.2015.02.011

PAN Xin, QIU Quan, LI Jiyue, WANG Junhui, HE Qian, SU Yan, MA Jianwei, DU Kun. Drought resistance evaluation based on leaf anatomical structures of 25 shrubs on the Tibetan Plateau[J]. Journal of South China Agricultural University, 2015, 36(2): 61-68. DOI: 10.7671/j.issn.1001-411X.2015.02.011

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Drought resistance evaluation based on leaf anatomical structures of 25 shrubs on the Tibetan Plateau

PAN Xin^{1, 2,},
QIU Quan¹,
LI Jiyue^1, ,,
WANG Junhui^3, ,,
HE Qian¹,
SU Yan¹,
MA Jianwei⁴,
DU Kun⁴

1.
College of Forestry, South China Agricultural University, Guangzhou 510642, China
2.
Fuzhou Forestry Bureau, Fuzhou 350007, China
3.
Research Institute of Forestry, Chinese Academy of Forestry/Key Laboratory of Tree Breeding and Cultivation, State Forestry Administration, Beijing 100091, China
4.
Xiaolongshan Forestry Science and Technology Research Institute, Tianshui 741022, China

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Received Date: October 22, 2013
Available Online: May 17, 2023

Graphical Abstract

Abstract

Abstract

Objective
This study reported the leaf anatomical structure, stomatal characteristics, and the response mechanism of water adaptability of 25 shrubs on Tibetan Plateau, with an aim to provide a reference beneficial to afforestation and selection of drought-resistant plants on the Tibetan Plateau and an attempt to outline how to screen excellent drought-resistant plants.
Method
Conventional paraffin section technique was used to make comparison with 12 indexes such as the thickness of leaf cuticle, upper epidermis, lower epidermis, palisade tissue, spongy tissue, and leaf thickness. The principal component analysis and subordinate function were used to develop a system to analyze and evaluate the plant drought resistance.
Result and conclusion
The result showed that the leaves of all the 25 shrubs had typical xeromorphic structures, and the maximum leaf thickness was up to 323.00 μm, 186.25 μm on average, and the maximum epidermal layer thickness was up to 4.83 μm, with an average of 1.71 μm, which presented that upper epidermis was 30.00% thicker than lower epidermis averagely, proving that the leaf stomata were small and dense as the result of long-term adaptive evolution in a drought plateau environment. Moreover, 12 indicator species differed from each other significantly.The five representative drought resistance indexes, including stomatal density, leaf thickness, palisade tissue thickness, spongy tissue thickness and stratum corneum thickness had been screened through a principal component analysis combined with the variation coefficient of each index. By using the method of subordinate function values, this study provides a sketch of content on sorting drought performance into different levels, including highly drought-resistant species, drought-tolerant species, drought-resistant in general species, and drought-sensitive species.
- shrub,
- leaf anatomical structure,
- stomatal characteristic,
- drought resistance,
- drought stress,
- Tibetan Plateau

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References (31)

References

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