陕西林业科技2023，Vol.51Issue(4)：15-19,5.DOI:10.3969/j.issn.1001-2117.2023.04.004
不同种源杉木幼苗对干旱胁迫的抗性差异
Resistance Response of Cunninghamia lanceolata Seedlings from Different Provenances to Drought Stress
摘要
Abstract
In this experiment,Cunninghamia lanceolata seedlings from five different provenances in northern subtropical Anhui Xiuning,central subtropical Jiangxi Anfu and Hunan Huitong,southern subtropical Guangxi Rongshui and Guangdong Xinyi were used as experimental materials.The growth and physiological responses of C.lanceolata seedlings from different provenances to drought stress were analyzed by hydroponic method with PEG 6000 simulated drought stress.The results showed that with the increase of PEG 6000 concentration from 0％～20％,the height and diameter increment of seedlings decreased gradually,and the water deficit rate of leaves increased.The activities of SOD,POD and CAT and the contents of soluble sugar,soluble protein and free proline increased first and then decreased.In addition to seedling height,the provenance had a significant effect on the growth physiology of C.lanceolata seedlings under drought stress,and Anhui Xiuning performed best over-all.The eight indexes of ground diameter increment,leaf relative water deficit rate,SOD,POD,CAT activity and soluble sugar,soluble protein and free proline content were used as evaluation inde-xes.Through the comprehensive evaluation of principal component analysis,the drought resistance of the five provenances was:Anhui Xiuning＞Hunan Huitong＞Jiangxi Anfu＞Guangxi Rongshui＞Guangdong Xinyi.The results showed that C.lanceolata was highly sensitive to drought,and there were great differences in drought resistance among provenances.The drought resistance of northern subtropical provenances was the strongest,followed by central subtropical provenances,and the drought resistance of southern subtropical provenances was the weakest.关键词
干旱胁迫/杉木/抗性评价/种源Key words
Drought stress/Cunninghamia lanceolata/resistance evaluation/provenance分类
农业科技引用本文复制引用
刘祥,钟华..不同种源杉木幼苗对干旱胁迫的抗性差异[J].陕西林业科技,2023,51(4):15-19,5.基金项目
广西自然科学基金面上项目(2019GXNSFAA186025). （2019GXNSFAA186025）
