NO2胁迫下两种鹅耳枥的光合生理特性变化

doi:10.12302/j.issn.1000-2006.202006062

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南京林业大学学报（自然科学版） ›› 2021, Vol. 45 ›› Issue (2): 10-16.doi: 10.12302/j.issn.1000-2006.202006062

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NO₂胁迫下两种鹅耳枥的光合生理特性变化

圣倩倩¹^,²(), 戴安琪¹^,², 宋敏¹^,², 唐睿²^,³, 祝遵凌¹^,²^,³^,^*()

1.南京林业大学风景园林学院,江苏南京 210037
2.南京林业大学南方现代林业协同创新中心, 江苏南京 210037
3.南京林业大学艺术设计学院,江苏南京 210037

收稿日期:2020-06-30 接受日期:2020-09-03 出版日期:2021-03-30 发布日期:2021-04-09
通讯作者: 祝遵凌
基金资助:
林业科技成果国家级推广项目(2019133119);国家自然科学基金项目(31770752);江苏省“333 工程”项目(BRA2018065);江苏省科技支撑计划(BM2013478);2020年江苏省产学研合作项目(FZ20200041)

Photosynthetic physiological characteristics of two kinds of hornbeam under NO₂ stress

SHENG Qianqian¹^,²(), DAI Anqi¹^,², SONG Min¹^,², TANG Rui²^,³, ZHU Zunling¹^,²^,³^,^*()

1. College of Landscape Architecture, Nanjing Forestry University,Nanjing 210037,China
2. Co-Innovation Center for the Sustainable Forestry in Southern China, Nanjing Forestry University,Nanjing 210037,China
3. College of Art and Design, Nanjing Forestry University, Nanjing 210037, China

Received:2020-06-30 Accepted:2020-09-03 Online:2021-03-30 Published:2021-04-09
Contact: ZHU Zunling

摘要/Abstract

摘要：

【目的】评价欧洲鹅耳枥和普陀鹅耳枥对NO₂胁迫的耐受力,为选择抗大气污染的园林树种提供参考。【方法】以12.0 mg/m³的NO₂对欧洲鹅耳枥和普陀鹅耳枥1年生幼苗进行熏气处理,熏气时间分别为胁迫零点(0 h,CK)、1、6、12、24、48、72 h,以及熏气后30 d测定两种鹅耳枥幼苗的光合生理指标和叶绿素荧光特性,分析不同NO₂熏气时间与苗木光合生理响应特征的关系,比较两种鹅耳枥对NO₂胁迫的适应性。【结果】NO₂胁迫后欧洲鹅耳枥具有较高的最大净光合速率(P_n,max)和暗呼吸速率(R_d),较低的光补偿点(LCP)和较高的光饱和点(LSP),表明欧洲鹅耳枥在较宽泛的光照强度下能够正常生长;欧洲鹅耳枥与普陀鹅耳枥的NO₂熏气1 h处理组最大PSⅡ光能转换效率(F_v/F_m)值增加,在6 h处理中仅欧洲鹅耳枥的F_v/F_m值增加,PSⅡ活性增强,用于光合电子传递的能量增多。【结论】推测认为欧洲鹅耳枥能够在NO₂胁迫下有序适应外界不良环境,耐受性更强。这对城市道路树种选择与植物配置具有重要意义。

关键词: NO₂胁迫, 欧洲鹅耳枥, 普陀鹅耳枥, 光合特性指标, 叶绿素荧光

Abstract:

【Objective】This paper is to evaluate the tolerance of Carpinus betulus and Carpinus putoensis to NO₂ stress, and to provide a reference for the selection of landscape tree species resistant to air pollution.【Method】The annual seedlings of C. betulus and C. putoensis were fumigated with 12.0 mg/m³ NO₂ for stress zero point(0 h, CK), 1, 6, 12, 24, 48, 72 h, respectively, the photosynthetic physiological indexes and chlorophyll fluorescence characteristics of C. betulus and C. putoensis seedlings were measured 30 days after fumigation. The relationship between different NO₂ fumigation time and photosynthetic physiological response characteristics was analyzed, and the adaptability of C. betulus and C. putoensis seedlings to NO₂ stress was compared.【Result】The results showed that after NO₂ stress, C. betulus had higher P_n,max and R_d, lower light compensation point (LCP) and higher light saturation point (LSP), which indicated that C. betulus could grow normally under a wide range of light intensity. It is increased that the maximum photosynthetical efficiency (F_v/F_m) of C. betulus and C. putoensis leaf treated by NO₂ for 1 hour. Only F_v/F_m value of C. betulus increased, PSⅡ activity and energy for photosynthetic electron transfer increased at 6 h of NO₂ stress.【Conclusion】It is suggested that C. betulus could adapt to the adverse environment in an orderly manner under NO₂ stress, with stronger tolerance. The results of this study are of great significance to the selection and allocation of urban road species.

Key words: NO₂ stress, Carpinus betulus, Carpinus putoensis, photosynthetic characteristics index, chlorophyll fluorescence

中图分类号:

S718
S687

圣倩倩,戴安琪,宋敏,等. NO₂胁迫下两种鹅耳枥的光合生理特性变化[J]. 南京林业大学学报（自然科学版）, 2021, 45(2): 10-16.

SHENG Qianqian, DAI Anqi, SONG Min, TANG Rui, ZHU Zunling. Photosynthetic physiological characteristics of two kinds of hornbeam under NO₂ stress[J].Journal of Nanjing Forestry University (Natural Science Edition), 2021, 45(2): 10-16.DOI: 10.12302/j.issn.1000-2006.202006062.

图/表 3

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