[1]MA Hongying,Lü Xiaoxu,JI Yanan,et al.Leaf Anatomical Structure and Drought Resistance of 17 Caragana Species[J].Research of Soil and Water Conservation,2020,27(01):340-346,352.
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Leaf Anatomical Structure and Drought Resistance of 17 Caragana Species
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
27
Number of periods:
2020 01
Page number:
340-346,352
Column:
Public date:
2020-02-20
- Title:
- Leaf Anatomical Structure and Drought Resistance of 17 Caragana Species
- Keywords:
- Caragana; leaf; anatomical structure; drought resistance
- CLC:
- Q944.5
- DOI:
- -
- Abstract:
- Caragana is an important plant resource for windbreak and sand-fixation, and soil and water conservation in the arid and semi-arid regions of northwest China, which is the great significance to restoration of ecological environment. In this study, the leaves of 17 Caragana species were used as experimental materials. The anatomical structure of leaves was observed by paraffin section technique. Eight leaf structure indexes such as leaf thickness, upper and lower epidermal cell thickness, palisade tissue thickness, spongy tissue thickness, main vein thickness, leaf structural tightness, leaf structural looseness were measured. The drought-resistant ability of 17 Caragana species was analyzed by hierarchical cluster analysis and subordinate function values. The results showed that there were three different types of mesophyll anatomical structure, during the process of drought-resistance enhancement, the mesophyll structure transited from ordinary type to transitional type and annular type; the leaf became thicker and thicker gradually; the palisade tissue and main vein became more and more developed, and the leaf structure became more compact; two groups were divided by hierarchical cluster analysis, the first group was characterized by large leaf thickness, palisade tissue thickness, sponge tissue thickness, leaf structure compactness, small leaf structure looseness and ring palisade structure(transitional type of C. bongardiana), the second group was characterized by large leaf structure looseness, leaf thickness and palisade tissue thickness, tight leaf structure and small epidermal cells thickness. According to the subordinate function values, drought-resistance ability of 17 Caragana species decreased in the order: C. brachypoda>C. roborovskyii>C. spinosa>C. acanthophylla>C. erinacea>C. pruinosa >C. bongardiana>C. zahlbruckneri>C. rosea>C. opulens>C. jubata>C. korshinskii> C. frutex>C. acanthophylla>C. microphylla>C. intermedia> C. sibirica. The results of this study can provide the theoretical basis for the popularization and application of Caragana in vegetation restoration and reconstruction in the arid and semi-arid areas.
- References:
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Last Update:
2020-02-25