安徽农学通报2026，Vol.32Issue(7)：45-51,7.DOI:10.16377/j.cnki.issn1007-7731.2026.07.012
干旱胁迫对马占相思幼苗生长及生理特性的影响
Effects of drought stress on the growth and physiological characteristics of Acacia mangium seedlings
摘要
Abstract
To investigate the tolerance of Acacia mangium to drought stress,a pot drought experiment was conducted.The growth indicators(plant height),antioxidant enzymes[superoxide dismutase(SOD),catalase(CAT),peroxidase(POD)],malondialdehyde(MDA)content,osmotic regulatory substances[proline(Pro),soluble sugar(SS),soluble protein(SP)],photosynthetic parameters[photosynthetic rate(Pn),transpiration rate(Tr),intercellular CO2 concentration(Ci),stomatal conductance(Gs)],and chlorophyll content of Acacia mangium seedlings under different degrees of water stress(drought stress for 7,14,21,and 28 days)were measured.Correlation analysis and principal component analysis were used to analyze the main influencing factors of its drought resistance.The results showed that as the degree of drought stress increased,the increase in plant height of Acacia mangium gradually decreased,while the activities of SOD,the contents of MDA,SS,Ci and chlorophyll all showed a trend of first decreasing and then increasing.The activities of POD and photosynthetic parameter indicators(except Ci)all showed a decreasing trend,while the contents of Pro,SS and SP all showed an increasing trend.Correlation and principal component analysis indicated that Pro,chlorophyll b(Chlb)and SP could be used as the main indicators for evaluating the drought resistance of Acacia mangium,while SOD and plant height could be used as auxiliary indicators.In conclusion,moderate drought can promote the accumulation of osmotic adjustment substances and the enhancement of antioxidant enzyme activity in Acacia mangium.关键词
马占相思/干旱胁迫/光合作用/生理特性/主成分分析Key words
Acacia mangium/drought stress/photosynthesis/physiological characteristics/principal component analysis分类
农业科技引用本文复制引用
张安琪,陈传莉,陈三雄..干旱胁迫对马占相思幼苗生长及生理特性的影响[J].安徽农学通报,2026,32(7):45-51,7.基金项目
广东省林业局省级生态公益林效益补偿资金省统筹经费项目"生态公益林区受损裸地植被恢复关键技术研究与示范"(KB2100801). （KB2100801）
