| Comparative drought resistance of different varieties of Zanthoxylum bungeanum |
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| DOI：10.7606/j.issn.1000-7601.2010.06.33 |
| Key Words: Zanthoxylum bungeanum physiological and biochemical indexes photosynthetic index biomass drought stress drought resistance |
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| Abstract: |
| With 1-year seedlings of 3 varieties of Zanthoxylum bungeanum as experimental material, a pot experi-ment was conducted under drought stress study the changes of their leaf relative water content ，soluble protein content,
MDA content, SOD, POD activity， chlorophyll content， net photosynthetic rate, stem biomass，root biomass, total
biomass and shoot ratio, and the membership function was used to carry out a comprehensive evaluation of their drought resistance. The results show that with the increase of drought stress , leaf relative water content of the 3 varieties were de-creased; MDA content and POD activity showed an upward trend ; soluble protein content decreased first and then in-creased; SOD activity, chlorophyll content and the average seasonal change of net photosynthetic rate increased first and then declined; Seasonal variation of net photosynthetic rate curves showed single peak or double peaks, but the peaks ap-peared at different time; stem biomass, root biomass and total biomass showed a decreasing trend; ratio of root and stem in three varieties showed that Doujiao decreased, Erhongpao went down and then up, and Dahongpao rose. The drought resistance of the three varieties was in the order of Doujiao>Erhongpao>Dahongpao. |
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