Physiological and Biochemical Characteristics of Zanthoxylum Armatum and Zanthoxylum Schinifolium Under Temperature Stress
To reveal the tolerance characteristics of different Zanthoxylum species varieties to temperature stress,four-month-old seedlings of Zanthoxylum armatum and Zanthoxylum schinifolium were used as experimental materials.The changes in superoxide dis-mutase(SOD)activity,proline(Pro)content,malondialdehyde(MDA)content,and total protein(TP)content in leaf tissues of each Zanthoxylum were observed after exposure to the temperature stress at 4℃and 42℃for 15 days,in order to determine the differences in temperature tolerance between different Zanthoxylum species.The results showed that after 15 days of temperature stress at both 4℃and 42℃,the SOD activity,Pro content,MDA content,and TP content of both Zanthoxylum armatum and Zan-thoxylum schinifolium increased.A comparative analysis revealed that under 4℃stress,the accumulation of osmotic substances TP and Pro in Zanthoxylum schinifolium was 18.45 and 8.34 times that of the control group,respectively,and SOD activity increased by 39.41%compared with the control group.In contrast,the TP content of Zanthoxylum armatum did not change significantly compared with the control group,Pro content increased to 5.09 times that of the control group,and SOD activity only increased by 8.95%.This indicated that Zanthoxylum schinifolium was more adaptable to low temperature changes than Zanthoxylum armatum.Under high temperature stress at 42℃,the accumulation of osmotic substances TP and Pro in Zanthoxylum armatum was 7 and 4.85 times that of the control group,respectively,while there was no significant change in Zanthoxylum schinifolium compared with the control group,indicating that Zanthoxylum armatum was more adaptable to high temperature changes than Zanthoxylum schinifolium.These findings have important reference value for guiding the introduction,cultivation,and promotion of Zanthoxy-lum spp.varieties.
Zanthoxylum armatumZanthoxylum schinifoliumtemperature stressosmotic regulation substanceantioxidant system
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维普
