浙江农业科学 ›› 2025, Vol. 66 ›› Issue (11): 2696-2701.DOI: 10.16178/j.issn.0528-9017.20240659

• 观赏园艺 • 上一篇    下一篇

镁对杉木幼苗新叶光合特性与抗氧化活性的影响

张筱1(), 汪凤林2, 曹光球2,3, 叶义全2,3   

  1. 1 秦岭国家植物园, 陕西 西安 710404
    2 福建农林大学 林学院, 福建 福州 350002
    3 国家林业和草原局杉木工程技术研究中心, 福建 福州 350002
  • 收稿日期:2024-08-14 出版日期:2025-11-11 发布日期:2025-12-01
  • 作者简介:张筱(1995—),女,陕西西安人,硕士,主要从事植物生理研究,E-mail:932875418@qq.com

Dynamic effects of different concentrations of magnesium on the photosynthetic characteristics and antioxidant activity of new leaves in Cunninghamia lanceolata

ZHANG Xiao1(), WANG Fenglin2, CAO Guangqiu2,3, YE Yiquan2,3   

  1. 1 Qinling National Botanical Garden, Xi'an 710404, Shaanxi
    2 College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, Fujian
    3 Chinese Fir Engineering Technology Research Center of National Forestry and Grassland Administration, Fuzhou 350002, Fujian
  • Received:2024-08-14 Online:2025-11-11 Published:2025-12-01

摘要:

为研究镁对杉木生长的影响,本研究以一年生杉木幼苗为试材,设计Mg0(0 mmol·L-1)、Mg1(1 mmol·L-1)、Mg3(3 mmol·L-1)3种镁浓度营养液,分析杉木在发育过程中不同浓度镁对新生叶片光合色素含量、叶绿素荧光参数、丙二醛(MDA)含量、超氧化物歧化酶(SOD)活性、过氧化氢酶(CAT)活性、过氧化物酶(POD)活性的动态影响。结果表明,生长60和90 d时Mg1和Mg3处理下杉木幼苗新叶光合色素含量显著(p<0.05)高于Mg0处理。生长60和120 d时Mg1或Mg3处理下叶绿素荧光参数显著高于Mg0处理。生长120 d时Mg1和Mg3处理下POD和CAT活性显著高于Mg0处理,MDA含量显著低于Mg0处理。因此,1 mmol·L-1可能是镁促进杉木新叶有效生长的临界点。

关键词: 杉木, 镁浓度, 光合色素, 叶绿素荧光, 抗氧化酶活性

Abstract:

To investigate the effects of magnesium on the growth of Cunninghamia lanceolata, this study used one-year Cunninghamia lanceolata as test materials and designed three magnesium concentration nutrient solutions, Mg0 (0 mmol·L-1), Mg1 (1 mmol·L-1), and Mg3 (3 mmol·L-1). The dynamic effects of different concentrations of magnesium on the photosynthetic pigment content, chlorophyll fluorescence parameters, malondialdehyde (MDA) content, superoxide dismutase (SOD) activity, catalase (CAT) activity, and peroxidase (POD) activity in newly formed leaves of Cunninghamia lanceolata were analyzed. The results showed that the content of photosynthetic pigments in new leaves of Cunninghamia lanceolata seedlings under Mg1 and Mg3 treatment was significantly (p<0.05) higher than that under Mg0 treatment on 60 and 90 days of growth. The chlorophyll fluorescence parameters under Mg1 or Mg3 treatment were significantly higher than those under Mg0 treatment on 60 and 120 days of growth. On 120 days of growth, POD and CAT activities were significantly higher under Mg1 and Mg3 treatment than that under Mg0 treatment, and MDA content was significantly lower than that under Mg0 treatment. Therefore, 1 mmol·L-1 may be the critical point for magnesium to promote effective growth of new leaves of Cunninghamia lanceolata.

Key words: Cunninghamia lanceolata, magnesium concentration, photosynthetic pigment, chlorophyll fluorescence, antioxidant enzyme activity

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