| 盐胁迫对望春玉兰幼苗形态和相关生理指标的影响 |
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| 引用本文： | 沈徐悦,张浪,陈蓉蓉,申亚梅,金荷仙.盐胁迫对望春玉兰幼苗形态和相关生理指标的影响[J].浙江农林大学学报,2021,38(2):289-295. |
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| 作者姓名： | 沈徐悦 张浪 陈蓉蓉 申亚梅 金荷仙 |
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| 作者单位： | 1.浙江农林大学 风景园林与建筑学院，浙江 杭州 3113002.上海市园林科学规划研究院，上海 200232 |
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| 基金项目： | 上海市园林科学规划研究院合作课题(H20180177);上海城市困难立地绿化工程技术研究中心建设专项(16dz2251400);上海市科委科研计划项目(19DZ1203300);浙江省重点研发项目(2019C02023);浙江省“十三五”林木新品种选育资助项目(2016C02056-12)。 |
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| 摘 要： | 目的 探讨盐胁迫对望春玉兰Magnolia biondii幼苗形态和相关生理指标的影响，并筛选盐胁迫下的指示性生理指标，为木兰科Magnoliaceae植物的耐盐性评价与筛选优质种质资源提供理论依据。 方法 以望春玉兰1年生实生苗为材料，采用水培法，测定200 mmol·L?1氯化钠胁迫下叶片的相对电导率、丙二醛质量摩尔浓度、叶绿素质量分数、渗透调节物质质量分数和抗氧化酶活性，通过主成分分析筛选关键生理指标。 结果 随着盐胁迫时间的延长，可溶性糖质量分数、相对电导率、丙二醛质量摩尔浓度和超氧化物歧化酶(SOD)活性总体呈上升趋势；可溶性蛋白质质量分数、脯氨酸质量分数、叶绿素质量分数和过氧化物酶(POD)活性总体呈先上升后下降的趋势。利用主成分分析法筛选出3个指示性指标，分别为丙二醛质量摩尔浓度、可溶性糖质量分数和SOD活性。 结论 氯化钠胁迫引起望春玉兰幼苗叶片丙二醛质量摩尔浓度、可溶性糖质量分数和SOD活性显著变化，可作为指示性生理指标用于评价氯化钠胁迫下望春玉兰等木兰科植物的耐盐性强弱。图4表2参19
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| 关 键 词： | 植物学 望春玉兰 氯化钠胁迫 生理响应 主成分分析 指示性指标 |
| 收稿时间： | 2020-07-17 |
Effect of Na Cl stress on the morphology and related physiological indexes of Magnolia biondii seedlings |
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| SHEN Xuyue,ZHANG Lang,CHEN Rongrong,SHEN Yamei,JIN Hexian.Effect of Na Cl stress on the morphology and related physiological indexes of Magnolia biondii seedlings[J].Journal of Zhejiang A&F University,2021,38(2):289-295. |
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| Authors: | SHEN Xuyue ZHANG Lang CHEN Rongrong SHEN Yamei JIN Hexian |
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| Affiliation: | 1.School of Landscape Architecture, Zhejiang A&F University, Hangzhou 311300, Zhejiang, China2.Shanghai Academy of Landscape Architecture Science and Planning, Shanghai 200232, China |
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| Abstract: | Objective]With an investigation conducted of the effects of NaCl stress on the morphology and related physiological indexes of Magnolia biondii seedlings and the physiological indexes indicating the NaCl stress screened,this paper is aimed to provide a theoretical basis for the evaluation of the salt tolerance of Magnoliaceae and the selection of high-quality germplasm resources.Method]Firstly,the hydroponic culture experiment was done with M.biondii 1-year-old seedlings with the effects of NaCl stress under 200 mmol·L-1on relative electrical conductivity,MDA contents,chlorophyll contents,osmotic substances and antioxidant enzyme activities in leaves tested,after which the principal component analysis was conducted to screen key physiological indexes.Result]With the increase of treatment time,the soluble sugar content,relative electric conductivity,MDA content and SOD activity increased.The soluble protein content,Pro content,chlorophyll content and POD activity first increased and then decreased.The three indicative physiological indexes screened by principal component analysis were MDA content,soluble sugar content and SOD activity.Conclusion]The MDA content,soluble sugar content and SOD activity underwent significant changes under Na Cl stress,and they could be used as key physiological indexes in the evaluation of the salt tolerance of Magnoliaceae such as M.biondii. |
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| Keywords: | botany Magnolia biondii NaCl stress physiology responses principal component analysis indicative indexes |
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