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应用生态学报 ›› 2020, Vol. 31 ›› Issue (3): 769-777.doi: 10.13287/j.1001-9332.202003.004

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遮阴对4种紫堇属植物光合特性和叶绿素荧光参数的影响

王亚楠1, 董丽娜2, 丁彦芬1*, 李涵1, 宋鹏1, 蔡慧1, 徐子涵1   

  1. 1南京林业大学, 南京 210037;
    2中山陵园管理局, 南京 210014
  • 收稿日期:2019-09-18 出版日期:2020-03-15 发布日期:2020-03-15
  • 通讯作者: E-mail: 1281569022@qq.com
  • 作者简介:王亚楠, 女, 1995年生, 硕士研究生。主要从事园林植物生理及应用研究。E-mail: 307542640@qq.com
  • 基金资助:
    本文由南京市绿化园林局项目(066018K60721)和江苏高校优势学科建设工程项目资助

Effects of shading on photosynthetic characteristics and chlorophyll fluorescence parameters of four Corydalis species

WANG Ya-nan1, DONG Li-na2, DING Yan-fen1*, LI Han1, SONG Peng1, CAI Hui1, XU Zi-han1   

  1. 1Nanjing Forestry University, Nanjing 210037, China;
    2Administration of Dr Sun Yatsen’s Mausoleum, Nanjing 210014, China
  • Received:2019-09-18 Online:2020-03-15 Published:2020-03-15
  • Contact: E-mail: 1281569022@qq.com
  • Supported by:
    This work was supported by the Project of Nanjing Greening and Landscape Municipal Bureau (066018K60721) and the Priority Academic Subject Construction Project of Jiangsu Higher Education Institutions

摘要: 采用盆栽试验,设置0、20%、40%、60%和80%遮阴度5种遮阴处理,研究遮阴对刻叶紫堇、伏生紫堇、紫堇和黄堇4种紫堇属植物叶绿素含量、光合特性和叶绿素荧光参数的影响,以加快其在园林方面的应用。结果表明: 随着遮阴度的提高,4种植物叶绿素a、叶绿素b和叶绿素(a+b)总量不断增加,刻叶紫堇在80%遮阴处理均达到最大,而伏生紫堇、紫堇和黄堇在60%遮阴处理达到最大;叶绿素a/b、光饱和点、光补偿点和暗呼吸速率的变化趋势呈相反的趋势。4种植物中,刻叶紫堇在80%遮阴处理下,伏生紫堇、紫堇和黄堇在60%遮阴度下各叶绿素荧光参数达到最大。4种植物耐阴性大小为刻叶紫堇>伏生紫堇>紫堇>黄堇。刻叶紫堇在80%遮阴处理,以及伏生紫堇、紫堇和黄堇在60%遮阴处理下光能利用率最大,光合能力最强,最有利于植物的生长。

Abstract: We examined the effects of five shading treatments (0, 20%, 40%, 60% and 80% shading) on chlorophyll content, photosynthetic characteristics, and chlorophyll fluorescence chara-cteristics of four Corydalis species (C. incisa, C. decumbens, C. edulis and C. pallida) in a pot experiment. The results showed that the contents of chlorophyll a, chlorophyll b and chlorophyll (a+b) increased with the increment of shading, with that of C. incisa reaching the maximum under 80% shading treatment and that of C. decumbens, C. edulis and C. pallida reaching a maximum under 60% shading treatment. In contrast, chlorophyll a/b, light saturation point, light compensation point and dark respiration rate decreased with increasing shading. Among the four Corydalis species, C. incisa reached up to the maximum chlorophyll fluorescence parameters under 80% shading treatment, and C. decumbens, C. edulis and C. pallida reached the maximum at 60% shading treatment. The shade tolerance of four species was as follows: C. incisaC. decumbensC. edulisC. pallida. C. incisa under 80% shading treatment and C. decumbens, C. edulis, C. pallida at 60% shading treatment had the highest light energy utilization and photosynthetic capacity, which would facilitate their growth.