低温对不同早园竹抗寒性和糖类物质含量的影响  

The effect of low temperature on cold resistance and sugar content of different Phyllostachys propinqua

作　　者：陈雷 王金革 李姗 裴男才[4] 李娟 高健 CHEN Lei;WANG Jingge;LI Shan;PEI Nancai;LI Juan;GAO Jian(International Centre for Bamboo and Rattan,Beijing 100102,China;China National Botanical Garden(North Garden),Beijing 100093,China;School of Landscape Architecture,Beijing University of Agriculture,Beijing 100096,China;Research Institute of Tropical Forestry,Chinese Academy of Forestry,Guangzhou 510520,Guangdong,China)

机构地区：[1]国际竹藤中心,北京100102 [2]国家植物园(北园),北京100093 [3]北京农学院园林学院,北京100096 [4]中国林业科学研究院热带林业研究所,广东广州510520

出　　处：《中南林业科技大学学报》2024年第9期161-169,共9页Journal of Central South University of Forestry & Technology

基　　金：国家自然科学基金项目(31971737,32001379)。

摘　　要：【目的】探讨低温胁迫下不同冻害形态表现的早园竹Phyllostachys propinqua叶片中相对电导率和糖类物质含量的变异,有助于系统了解不同形态早园竹抗寒能力以及解糖类物质对植物抗寒性的影响,为华北地区早园竹引种和应用提供技术支撑。【方法】以北京市城市公园中冬季不同形态的早园竹Phyllostachys propinqua为研究对象,冬季记录并采集不同形态早园竹叶片,测定不同低温梯度处理下叶片的相对电导率和糖类物质含量。【结果】1)随着处理温度的下降,不同早园竹叶片的相对电导率及可溶性糖、果糖和蔗糖含量显著上升,而淀粉含量呈现下降趋势。2)在低温环境下,干枯叶片中相对电导率显著高于其他类型叶片,绿色叶片中可溶性糖、蔗糖和果糖含量普遍较高,但是在-25℃下,轻微发黄叶片中蔗糖含量达到了21.11 mg‧g^(-1),显著高于其他模式。3)低温半致死温度最低的为轻微发黄叶片,达到了-26.07℃;其次为绿色叶片和发黄叶片,分别为-25.19℃和-24.30℃;轻微干枯叶片为-24.08℃,而干枯叶片仅为-22.09℃。4)在所有糖类指标中,低温环境下蔗糖能够反映植物的抗寒性,而果糖指标相对较差。【结论】低温是导致北京早园竹冬季普遍存在叶片发黄和干枯的主要环境因素,轻微发黄的早园竹抗寒性最强,其次为绿色和轻微干枯早园竹。低温环境下蔗糖能够反映早园竹的抗寒性。【Objective】This study focuses on the variation of relative conductivity and saccharide content in the leaves of Phyllostachys propinqua with different freezing morphologies under low-temperature stress.The aim is to provide a systematic understanding of the cold-resistance ability of different morphologies of P.propinqua,as well as the effect of saccharides on the cold-resistance of the plants.The findings will also offer technical support for the introduction and application of P.propinqua in North China.【Method】The leaves of P.propinqua with different forms were recorded and collected in winter in urban parks of Beijing.The relative conductivity and saccharide content of the leaves were determined under different low-temperature gradient treatments.【Result】(1)The relative conductivity,soluble sugar,fructose and sucrose contents of different P.propinqua leaves increased significantly with the decrease of treatment temperature,while the starch content showed a decreasing trend.(2)At the low temperature,the relative conductivity in dried leaves was significantly higher than that in other types of leaves;The soluble sugar,sucrose,fructose contents in slightly yellowed and green leaves was significantly higher than that in yellowed and dried leaves,however,when the temperature dropped to -25℃,the content of sucrose in slightly yellowed leaves continued to increase and reached 21.11 mg·g^(-1),which was significantly higher than the other patterns.(3)The lowest low-temperature half-lethal temperature was -26.07℃ in slightly yellowed leaves,followed by -25.19℃and-24.30℃ in green and yellowed leaves,respectively,and -24.08℃ in slightly dry leaves,and only-22.09℃ in dry leaves.(4)The correlation analysis showed that,among all the sugar indexes,sucrose was able to reflect the cold resistance of the plant in low-temperature environments,whereas the indexes of fructose were relatively poorer.【Conclusion】Low temperature is the main environmental factor that causes yellowing and drying of P.propin

关 键 词：早园竹 抗寒性 糖类物质 蔗糖 低温 

分 类 号：S718.3[农业科学—林学]