湖北农业科学 ›› 2024, Vol. 63 ›› Issue (10): 102-105.doi: 10.14088/j.cnki.issn0439-8114.2024.10.018

• 园艺·特产 • 上一篇    下一篇

不同栽植环境下守宫木的生理响应及其耐阴性评价

梁小春1, 姜星宇2, 郭品湘2, 杨秀玲2,3, 李琳2,3, 蒋若琳2, 王凌晖2   

  1. 1.广西壮族自治区南宁树木园,南宁 530031;
    2.广西大学林学院,南宁 530004;
    3.玉林师范学院,广西 玉林 537000
  • 收稿日期:2023-08-07 出版日期:2024-10-25 发布日期:2024-11-05
  • 通讯作者: 王凌晖(1965-),男,教授,博士,主要从事森林培育研究,(电子信箱)wanglinghui97@163.com。
  • 作者简介:梁小春(1984-),女,广西北海人,工程师,硕士,主要从事林木遗传育种和木本蔬菜繁育技术研究,(电子信箱)83225870@qq.com。
  • 基金资助:
    南宁树木园林下木本蔬菜种植技术研究与示范基金项目(南宁树木园科字2018-1号)

Physiological response and shading tolerance evaluation of Sauropus androgynus in different planting environment

LIANG Xiao-chun1, JIANG Xing-yu2, GUO Pin-xiang2, YANG Xiu-ling2,3, LI Lin2,3, JIANG Ruo-lin2, WANG Ling-hui2   

  1. 1. Nanning Arboretum, Guangxi Zhuang Autonomous Region, Nanning 530031, China;
    2. School of Forestry, Guangxi University, Nanning 530004, China;
    3. Yulin Normal University, Yulin 537000, Guangxi, China
  • Received:2023-08-07 Published:2024-10-25 Online:2024-11-05

摘要: 为探究不同栽植环境对守宫木[Sauropus androgynus (L.) Merr.]生理特性的影响,并对其耐阴性进行评价,以3年生守宫木扦插苗为研究对象,分别在露天(100%光照强度)、林下(65%光照强度)、大棚(30%光照强度)3种环境下栽植,测定不同环境下守宫木叶片光合色素含量、瞬时光合特性及渗透调节物质含量。结果表明,林下种植、棚下种植守宫木的叶绿素a及叶绿素(a+b)含量均极显著高于露天环境;随着遮阴程度的增加,叶片净光合速率先增后减,在林下种植时最高,而气孔导度、胞间CO2 浓度及蒸腾速率则表现为露天种植>林下种植>棚下种植,随着遮阴程度的增加逐渐下降。可溶性糖、可溶性蛋白质含量随着遮阴程度增加而先升后降,林下种植时达到最大;游离脯氨酸和MDA含量随着遮阴程度增加不断下降,露天种植时达到最大。隶属函数分析表明,林下环境的守宫木植株光合及生理状态最佳,过强或过弱光照环境均不适合其生长。

关键词: 守宫木[Sauropus androgynus (L.) Merr.], 栽植环境, 耐阴性, 生理响应

Abstract: In order to explore the effects of different planting environments on the physiological characteristics of Sauropus androgynus (L.) Merr. , and to evaluate its shade tolerance, the 3-year-old cutting seedlings of Sauropus androgynus were planted in three environments: Outdoor (100% light intensity), underwood (65% light intensity) and greenhouse (30% light intensity) planting. The photosynthetic pigment content, instantaneous photosynthetic characteristics and osmotic adjustment substance content of Sauropus androgynus leaves under different environments were determined. The results showed that the contents of chlorophyll a and chlorophyll (a+b) of Sauropus androgynus in underwood and greenhouse planting were significantly higher than those of outdoor planting; with the increase of shading degree, the net photosynthetic rate of leaves increased first and then decreased, and reached the highest in underwood planting, while stomata conductance, intercellular CO2 concentration and transpiration rate showed outdoor planting > underwood planting > greenhouse planting, and gradually decreased with the increase of shading degree. The content of soluble sugar and soluble protein increased first and then decreased with the increase of shading degree, and reached the maximum in underwood planting; the contents of free proline and MDA decreased with the increase of shading degree, and reached the maximum in outdoor planting. The results of membership degree analysis showed that the photosynthetic and physiological status of Sauropus androgynus plants was the best in underwood planting, and the too strong or too weak light environment was not suitable for their growth.

Key words: Sauropus androgynus (L.) Merr., planting environment, shade-tolerance, physiological response

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