广西林业科学2024，Vol.53Issue(6)：746-753,8.DOI:10.19692/j.issn.1006-1126.20240608
大叶榉幼苗对淹水胁迫的响应和抗涝性评价
Responses of Zelkova schneideriana Seedlings to Flooding Stress and Evaluation of Waterlogging Resistance
摘要
Abstract
In order to investigate responses of Zelkova schneideriana seedlings to different flooding stresses and provide theoretical basis for water management during seedling stage of Z.schneideriana and selection of land-scape and ecological greening tree species in waterlogging areas,two-year-old Z.schneideriana cuttings were used as experimental materials.Normal irrigation was set as control(CK),and four flooding treatments were es-tablished including mild flooding(water surface was flushed with soil surface,W1),moderate flooding(water surface was 15 cm above soil surface,W2),severe flooding(water surface was about 30 cm above soil surface,W3)and near-total submersion(water surface completely submerged seedlings,W4).Growth conditions,leaf functional traits and photosynthetic characteristics of Z.schneideriana seedlings under different treatments were analyzed.Principal component analysis and membership function analysis were used to evaluate waterlog-ging resistance of Z.schneideriana seedlings.Results showed that increments of plant height and ground diame-ter of Z.schneideriana seedlings decreased with increase of flooding stress degree.On the 30th day of flooding stress,leaf relative water content was the highest in W4 treatment.Specific leaf weight showed"M"shape trend with increase of flooding stress degree.On the 60th day of flooding stress,there were no significant differences in leaf relative water contents of different treatments.Specific leaf weight showed trend of first increase and then decrease with increase of flooding stress degree.With increase of flooding stress degree,chlorophyll contents and net photosynthetic rate showed trends of first decrease and then increase,transpiration rate and stomatal conductance decreased,and intercellular carbon dioxide concentration showed trend of first decrease and then increase and then decrease.Waterlogging resistance of Z.schneideriana seedlings was classified as moderate.Z.schneideriana seedlings could survive for 60 days under mild,moderate,severe and near-total submersion environments.关键词
生长/光合特性/淹水胁迫/大叶榉Key words
growth/photosynthetic characteristic/flooding stress/Zelkova schneideriana分类
农业科技引用本文复制引用
罗良玉,余春和,马道承,郑党斌,岑祚舟,王凌晖..大叶榉幼苗对淹水胁迫的响应和抗涝性评价[J].广西林业科学,2024,53(6):746-753,8.基金项目
广西自筹经费林业科技项目(2023GXZCLK36) （2023GXZCLK36）
