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中国农学通报 ›› 2022, Vol. 38 ›› Issue (16): 62-67.doi: 10.11924/j.issn.1000-6850.casb2021-0753

所属专题: 园艺

• 林学·园艺·园林 • 上一篇    下一篇

海南重楼光合特性研究

张博伦1(), 曹基武1, 梁其东1, 梁军生2,3, 张翼2,3, 彭翠英2,3, 王旭军2,3()   

  1. 1中南林业科技大学,长沙 410004
    2湖南省林业科学院,长沙 410004
    3湖南省林下特色生物资源培育与利用工程技术研究中心,长沙 410004
  • 收稿日期:2021-08-10 修回日期:2021-11-08 出版日期:2022-06-05 发布日期:2022-06-09
  • 通讯作者: 王旭军
  • 作者简介:张博伦,男,1993年出生,湖南株洲人,硕士研究生,研究方向为观赏园艺与药用植物。通信地址:410004 湖南省长沙市天心区韶山南路498号 中南林业科技大学,E-mail: bolunzhang@qq.com
  • 基金资助:
    湖南省科技创新平台与人才计划“湖南省林下特色生物资源培育与利用工程技术研究中心”(2016TP2009)

Study on Photosynthetic Characteristics of Paris dunniana

ZHANG Bolun1(), CAO Jiwu1, LIANG Qidong1, LIANG Junsheng2,3, ZHANG Yi2,3, PENG Cuiying2,3, WANG Xujun2,3()   

  1. 1Central South University of Forestry and Technology, Changsha 410004
    2Hunan Academy of Forestry, Changsha 410004
    3Hunan Engineering Research Center for Cultivation and Utilization of Distinctive Bio-resources Under Forest, Changsha 410004
  • Received:2021-08-10 Revised:2021-11-08 Online:2022-06-05 Published:2022-06-09
  • Contact: WANG Xujun

摘要:

海南重楼为濒危保护植物,野生资源匮乏,在引种后的人工栽培过程中,为向其提供良好的生长条件,充分发挥其光合潜力,需要了解其光合特性。以林下生长的海南重楼为材料,使用LI-6400XT便携式光合仪对其光合作用日变化、光响应特性及CO2响应特性进行测量。海南重楼叶片净光合速率日变化表现为“单峰”曲线,峰值出现在14:00。相关分析和多元逐步回归分析发现,影响海南重楼净光合速率日变化的主要因子为气孔导度。海南重楼的光补偿点为3.04 μmol/(m2·s),光饱和点为737.5 μmol/(m2·s),表观量子效率为0.0452 μmol/(m2·s);海南重楼的CO2补偿点为92.33 μmol/mol,CO2饱和点为1687.5 μmol/mol,羧化速率为0.0124 μmol/mol。测量海南重楼的光合特性,可为其人工栽培的光照条件控制提供参考数据。

关键词: 海南重楼, 光合特性, 光合日变化, 光响应, CO2响应

Abstract:

Paris dunniana is a kind of endangered and conservational plant with scarce wild resources. In the artificial cultivation process after P. dunniana introduction, to provide good growth conditions and give full play to its photosynthetic potential, it is necessary to understand P. dunniana photosynthetic characteristics and the relationship between physiological and ecological factors and photosynthetic rate. The diurnal variation of photosynthesis, light-response curve and CO2-response curve of P. dunniana were studied using LI-6400XT portable photosynthesis system in closed stand. The diurnal variation of photosynthesis presented a single-peak curve, and its peak appeared at 14:00. The correlation analysis and multiple stepwise regression analysis showed that the main affecting factor of diurnal variation of photosynthesis was stomatal conductance (Cond). The light compensation point (LCP), light saturation point (LSP) and apparent quantum efficiency (AQY) were 3.04, 737.5 and 0.0452 μmol/(m2·s), respectively. The CO2 compensation point (CCP), CO2 saturation point (CSP), and carboxylation efficiency (CE) were 92.33, 1687.5 and 0.0124 μmol/mol, respectively. This experiment provides reference data for the control of light condition in the artificial cultivation of P. dunniana by measuring its photosynthetic characteristics.

Key words: Paris dunniana, photosynthetic characteristics, diurnal variation of photosynthesis, light-response curve, CO2-response curve

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