| Comprehensive evaluation on drought resistance of five economic forest species at seedling stage in aird areas of Gansu province |
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| DOI：10.7606/j.issn.1000-7601.2017.01.30 |
| Key Words: economic forest drought resistance arid areas of Gansu comprehensive evaluation |
| Author Name | Affiliation | | CHONG Pei-fang | College of Forestry, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | SHAN Li-shan | College of Forestry, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | SU Shi-ping | College of Forestry, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | LI Yi | College of Forestry, Gansu Agricultural University, Lanzhou, Gansu 730070, China |
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| Abstract: |
| A pot experiment was conducted to investigate the effect of drought stress on the drought resistance of five economic forest species, i. e., Juglans regia, Ziziphus jujuba Mill, Lycium barbarum L., Hippophae rhamnoides Linn and Zanthoxylum bungeanum Maxim. Using the methods of subordination function and grey correlation analysis, the relationship between drought resistance with the physiological and biochemical indexes including relative permeability of plasma (RPP), root vigor(RV), malondialdehyde (MDA),chlorophyll(a+b),osmotic adjustment substances and activities of antioxidant enzymes(SOD、POD、CAT) were evaluated. The results showed that the order of drought resistance in five economic forest species were different under four drought stress trentments, subordination function value of J.regia is 0.5385 which is the highest under CK treatment, and subordination function value of Z.bungeanum Maxim is 0.5312 which is the highest under HD treatment. Comprehensive evaluation indicated that the subordination function value of five economic forest species respectively were 0.5610(Z.bungeanum Maxim.), 0.4992(J.regia), 0.4796(Z.jujuba Mill), 0.5028(L.barbarum L.), 0.5221(H.rhamnoides Linn), with the order of Z.bungeanum Maxim.> L.barbarum L.> H.rhamnoides Linn > J.regia> Z.jujuba Mill. This result had some relevance to selecting appropriate species for drought conditions. The correlation degrees average value of proline (Pro), RPP, soluble sugur (SS), soluble protein (SP), MDA and CAT is 0.8562. The adaptation mechanism of five forest species to drought stress were attributed to osmotic adjustment substances, activities of antioxidant enzymes and lipid peroxidation. |
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