西北林学院学报2026，Vol.41Issue(3)：47-58,12.DOI:10.3969/j.issn.1001-7461.2026.03.05
干旱胁迫对沙地柏幼苗生长及生理特性的影响
Effects of Drought Stress on Growth and Physiological Characteristics of Juniperus sabina Seedlings
摘要
Abstract
To investigate the effects of drought stress on the growth and physiology of Juniperus sabina seedlings,one-year-old cuttings were used as experimental material.Four treatments were established:nor-mal watering(75%-80%of field capacity),mild drought(55%-60%of field capacity),moderate drought(35%-40%of field capacity),and severe drought(15%-20%of field capacity).Changes in growth and physiological indicators were compared across treatments.Results indicated that as drought stress intensified,growth and photosynthetic parameters of J.sabina seedlings showed a significant down-ward trend(decreases in plant height,stem diameter increment,biomass,net photosynthetic rate,etc.,while root-to-shoot ratio increased and chlorophyll content first rose then fell),and membrane damage in-dicators(MDA)progressively increased.Concurrently,seedling concentrations of osmotic regulators(pro-line,soluble sugars,etc.)and antioxidant enzyme activities(SOD,POD,etc.)generally increased,exhibi-ting organ-specific variations.Correlation analysis revealed positive correlations between growth and photo-synthetic indices,negative correlations between membrane damage indices and growth∕photosynthesis indi-ces,and negative correlations between osmotic regulators∕antioxidant enzymes and membrane damage indi-ces.In summary,J.sabina seedlings resist drought through multifaceted synergistic actions:on one hand,they adjust growth and photosynthetic strategies by slowing shoot height and biomass accumulation rates,reducing net photosynthetic rates,and minimizing energy dissipation,while adapting to drought conditions via increased root-to-shoot ratios and chlorophyll content that initially rises then declines;the other hand,they activate defense mechanisms by altering water accumulation and distribution patterns,enhancing SOD,POD,and CAT activities,and proactively accumulating osmotic regulators to counter drought stress.关键词
沙地柏/干旱胁迫/生长特性/生理响应Key words
J.sabina/drought stress/growth characteristics/physiological responses分类
农业科技引用本文复制引用
李荣,高荣,张学婕,柴红烨,李剑,石长春,曹庆喜,赵学庆,刘冬林,陈倩..干旱胁迫对沙地柏幼苗生长及生理特性的影响[J].西北林学院学报,2026,41(3):47-58,12.基金项目
陕西林业科技创新专项(SXLK2025-0105) （SXLK2025-0105）
陕西林业科技创新重点专项(SXLK2024-0204) （SXLK2024-0204）
陕西林业科技创新青年人才培育专项(SXLK2024-0601) （SXLK2024-0601）
国家林业和草原局揭榜挂帅项目(202401-04) （202401-04）
榆林市委、市政府专项(榆政财资发[2021]47号) （榆政财资发[2021]47号）
"三北"工程攻坚战共性基础理论研究(办科字[2024]126号) （办科字[2024]126号）
黄河"几字弯"攻坚战关键技术攻坚(办科字[2024]126号). （办科字[2024]126号）
