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中国农学通报

中国农学通报 ›› 2021, Vol. 37 ›› Issue (15): 47-54.doi: 10.11924/j.issn.1000-6850.casb2020-0458

所属专题： 资源与环境； 农业气象

• 资源·环境·生态·土壤·气象 • 上一篇    下一篇

生根剂GGR-6对紫羊茅和草地早熟禾响应干旱胁迫的影响

王竞红1(), 陈艾1, 张雯1, 赵艺1, 田静瑶1, 王贞升1, 徐谷丹2, 蔺吉祥1()   

  1. 1东北林业大学园林学院,哈尔滨 150040
    2北方航空护林总站,哈尔滨 150040
  • 收稿日期:2020-09-14 修回日期:2021-01-04 出版日期:2021-05-25 发布日期:2021-05-18
  • 通讯作者: 蔺吉祥
  • 作者简介:王竞红,女,1974年出生,黑龙江哈尔滨人,副教授,硕士生导师,博士,主要从事草坪生理生态学研究。通信地址：150040 黑龙江省哈尔滨市香坊区和兴路26号,Tel：0451-82192697,E-mail： yuanlin@nefu.edu.cn。
  • 基金资助:
    国家自然科学基金“丛枝菌根介导下芒颖大麦草根系适应氮沉降与冷胁迫交互作用的生理机制解析”(32072666);黑龙江省自然科学基金“季冻土壤区宽叶苔草根系构型与土壤非生物因子耦合关系初探”(LH2020C046)

Rooting Agent (GGR-6): Effects on the Response of Festuca rubra and Poa pratensis to Drought Stress

Wang Jinghong1(), Chen Ai1, Zhang Wen1, Zhao Yi1, Tian Jingyao1, Wang Zhensheng1, Xu Gudan2, Lin Jixiang1()   

  1. 1College of Landscape Architecture, Northeast Forestry University, Harbin 150040
    2North Aviation Forest Station, Harbin 150040
  • Received:2020-09-14 Revised:2021-01-04 Online:2021-05-25 Published:2021-05-18
  • Contact: Lin Jixiang

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摘要：

为了明确生根剂GGR-6对植物生长与抗旱性的生理作用,以2种优质草坪草-紫羊茅‘梦神’(Festuca rubra ‘Rubra’)、草地早熟禾‘优异’(Poa pratensis ‘Merit’)为供试材料,通过控水的处理方法,分别在播种后不同时期,用不同浓度的GGR-6对2种草坪草进行浇灌。结果表明：随着干旱胁迫的进行,紫羊茅和早熟禾的抗氧化酶活性呈现先增加后降低的趋势,同时游离脯氨酸含量增加,以维持渗透平衡,叶片MDA含量保持在较低的水平。早熟禾的抗旱能力高于紫羊茅。浇灌GGR-6对2种草坪草幼苗的生长有明显的促进作用,并可以提高其抗旱能力。其中,紫羊茅于播种后1周浇灌低浓度(0.1 g/L、0.2 g/L)的GGR-6效果较好;早熟禾于播种2周后浇灌低浓度(0.1 g/L、0.2 g/L)的GGR-6,播种3周后浇灌高浓度(0.3 g/L)的GGR-6效果较好。研究结果证实GGR-6对提高植物耐旱性具有重要作用,并为利用外源物质提高植物抗逆性提供一定的科学依据。

关键词: 生根剂, GGR-6, 干旱胁迫, 紫羊茅, 草地早熟禾, 草坪草, 渗透调节

Abstract:

To explore the physiological role of rooting agent (GGR-6) on plant growth and drought tolerance, two high quality turfgrass, Festuca rubra ‘Rubra’ and Poa pratensis ‘Merit’ were used as the materials in this study. The controlling water method was adopted, and the two kinds of turfgrass were irrigated with different concentrations of GGR-6 at different periods after sowing. The results showed that the activities of antioxidant enzymes in F. rubra and P. pratensis increased first and then decreased under drought stress, and the content of free proline increased to maintain osmotic balance, but the content of MDA in leaf kept at a low level. The drought tolerance of P. pratensis was higher than that of F. rubra. GGR-6 irrigation could obviously promote the growth of the two kinds of turfgrass seedlings, and improve their drought resistance. For F. rubra, GGR-6 irrigation with low concentrations (0.1 g/L, 0.2 g/L) one week after sowing had a better effect. For P. pratensis, GGR-6 irrigation with low concentrations (0.1 g/L, 0.2 g/L) two weeks after sowing, and high concentration (0.3 g/L) after three weeks had better effects. The results suggest that GGR-6 plays an important role in the drought tolerance of plant, and the study provides a scientific basis for the use of exogenous substances to improve plant drought resistance.

Key words: rooting agent, GGR-6, drought stress, Festuca rubra, Poa pratensis, turfgrass, osmotic adjustment

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