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中国农学通报 ›› 2021, Vol. 37 ›› Issue (7): 43-48.doi: 10.11924/j.issn.1000-6850.casb20200200093

所属专题: 生物技术

• 林学·园艺·园林 • 上一篇    下一篇

盐碱胁迫下外源H2O2对毛白杨生理特性的影响

任金兰()   

  1. 山西省关帝山国有林管理局屯兰川林场,山西古交 030208
  • 收稿日期:2020-02-09 修回日期:2021-01-18 出版日期:2021-03-05 发布日期:2021-03-17
  • 作者简介:任金兰,女,1970年出生,山西古交人,林业工程师,本科,主要从事林业栽培生理方面的研究工作。通信地址:030208 山西省古交市岔口乡岔口林场,E-mail: renjinlan123@163.com
  • 基金资助:
    山西省科技厅攻关项目“油松、落叶松、杨优良品种选育及旱柳高效营林技术研究”(20120311014-1)

Effects of Exogenous H2O2 on Physiological Characteristics of Populus tomentosa Under Saline-alkali Stress

Ren Jinlan()   

  1. Tunlanchuan Forest Farm of Shanxi Guandi Mountain State Forestry Administration, Gujiao Shanxi 030208
  • Received:2020-02-09 Revised:2021-01-18 Online:2021-03-05 Published:2021-03-17

摘要:

研究外源H2O2对盐碱胁迫下毛白杨生理特性的影响规律,为提高毛白杨盐碱地造林效果提供理论依据。在盆栽条件下,设置营养液(对照,H1)、营养液+NaHCO3+NaCl(H2)、营养液+NaHCO3+NaCl+H2O2(H3)、营养液+H2O2(H4)4个处理,3次重复。结果表明,H2与H1相比显著提高了毛白杨超氧阴离子、过氧化氢、MDA含量及相对电导率,H3与H2相比显著降低了超氧阴离子、过氧化氢含量,相对电导率和MDA含量降低不显著,H4与H1之间无显著差异;H2与H1相比显著提高了SOD、POD、CAT、APX活性,提高了AsA和GSH含量,H3与H2相比提高了毛白杨保护酶活性和H2O2清除系统活性,H4与H1相比显著提高了毛白杨AsA含量;H2与H1相比显著提高了毛白杨可溶性糖含量,H3与H2相比降低了可溶性糖含量;H1与H2相比、H3与H2相比均提高了毛白杨可溶性蛋白和游离脯氨酸含量。综合分析认为,外源H2O2会激发毛白杨生理响应机制并缓解盐碱胁迫效果显著。

关键词: 盐碱胁迫, 过氧化氢, 毛白杨, 生理响应, 保护酶, MDA

Abstract:

By studying the influence of exogenous H2O2 on physiological characteristics of Populus tomentosa under saline-alkali stress, the paper aims to provide a theoretical basis to improve the afforestation of P. tomentosa in saline-alkali land. Under potted condition, four treatments were set including nutrient solution (control, H1), nutrient solution+NaHCO3+NaCl (H2), nutrient solution+NaHCO3+NaCl+H2O2(H3), and nutrient solution+H2O2 (H4), which were repeated for 3 times. The results showed that: the content of superoxide anion, hydrogen peroxide, MDA and conductivity of P. tomentosa of H2 was significantly higher than those of H1, and the content of superoxide anion and hydrogen peroxide of H3 was significantly lower than those of H2, while the decrease of conductivity and MDA content was not significant, and there was no significant difference between H4 and H1; the activity of SOD, POD, CAT and APX of H2 was significantly higher than those of H1, increasing the content of AsA and GSH, H3 had an increase in the activity of protective enzyme and the activity of H2O2 scavenging system of P. tomentosa compared with H2, while H4 significantly increased the AsA content of P. tomentosa compared with H1; H2 significantly increased the content of soluble sugar of P. tomentosa compared with H1, while H3 decreased the soluble sugar content compared with H2; the content of soluble protein and free proline of P. tomentosa were increased by H1 compared with H2 and by H3 compared with H2. Through the comprehensive analysis, it is believed that exogenous H2O2 can stimulate the physiological response mechanism of P. tomentosa and alleviate salinity stress significantly.

Key words: saline-alkali stress, H2O2, Populus tomentosa, physiological response, protective enzyme, MDA

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