浙江农业学报 ›› 2024, Vol. 36 ›› Issue (6): 1300-1308.DOI: 10.3969/j.issn.1004-1524.20230812

• 园艺科学 • 上一篇    下一篇

NaCl对樱桃砧木组培生根、IAA原位分布及相关酶活性的影响

高兰芸1(), 刘昊2, 李爱1, 张婷婷1, 杨丽芳2, 高英1,*()   

  1. 1.天津农学院 园艺园林学院,天津 300392
    2.天津市农业科学院 林业果树研究所,天津 300384
  • 收稿日期:2023-06-29 出版日期:2024-06-25 发布日期:2024-07-02
  • 作者简介:高兰芸(1998—),女,宁夏中卫人,硕士,研究方向为果树学。E-mail:1986648561@qq.com
  • 通讯作者: *高英,E-mail: gying@tjau.edu.cn
  • 基金资助:
    国家自然科学基金项目(31800572);天津市现代农业产业技术体系建设(林果)项目(ITTHRS2021000)

Effects of NaCl on rooting, in-situ distribution of IAA and related enzyme activities of cherry rootstock seedlings

GAO Lanyun1(), LIU Hao2, LI Ai1, ZHANG Tingting1, YANG Lifang2, GAO Ying1,*()   

  1. 1. College of Horticulture and Landscape Architecture, Tianjin Agricultural University, Tianjin 300392, China
    2. Forestry Fruit Research Institute, Tianjin Academy of Agricultural Sciences, Tianjin 300384, China
  • Received:2023-06-29 Online:2024-06-25 Published:2024-07-02

摘要:

为阐明NaCl对樱桃砧木组培生根的影响,试验以吉塞拉6号组培苗为材料,首先研究了不同浓度NaCl处理下组培苗不定根发生指标,然后根据生根指标进一步研究了10 mmol·L-1和80 mmol·L-1NaCl处理下的解剖结构、发根过程酶活性及吲哚-3-2酸(IAA)的原位分布。结果表明,10 mmol·L-1NaCl处理下樱桃组培苗生根率和生根指数均最高,且显著高于其他处理,分别为58%和13.43;该处理下生根最快,2 d时形成层开始增厚,6 d时根原基形成,10 d时不定根突破表皮。各处理超氧化物歧化酶(SOD)活性在6 d时均达到峰值;过氧化物酶(POD)、多酚氧化酶(PPO)、吲哚乙酸氧化酶(IAAO)活性变化各处理存在差异,CK均呈上升趋势,与CK相比,10 mmol·L-1处理IAAO活性于2 d出现峰值。利用免疫胶体金技术对IAA进行原位分析发现,10 mmol·L-1处理2 d时IAA主要分布于形成层,6 d时IAA大量分布于根原基,10 d时IAA集中分布于不定根维管组织。综上,10 mmol·L-1NaCl处理对樱桃组培苗不定根发生具有一定的促进作用,为进一步研究樱桃组培苗不定根发生及调控机制提供参考。

关键词: 樱桃, 砧木, 生根, 酶活性, 免疫组化

Abstract:

In order to clarify the effect of NaCl on the rooting of cherry rootstock, this experiment took the Gisela 6 tissue culture seedling as the material, and firstly studied the index of adventitious root occurrence in the tissue culture seedling treated with different concentrations of NaCl. Then, the anatomical structure, enzyme activity and in-situ distribution of IAA under 10 mmol·L-1and 80 mmol·L-1NaCl were further studied according to rooting indexes. The results showed that the rooting rate and rooting index of cherry tissue seedlings were the highest under the treatment of 10 mmol·L-1NaCl, and were significantly higher than other treatments, which were 58% and 13.43, respectively. Under this treatment the rooting speed was the fastest, the cambium thickened at 2 d, the root primodia formed at 6 d, and the adventitious roots broke through the epidermis at 10 d. SOD activity of each treatment reached the peak at 6 d. The activity changes of POD, PPO and IAAO were different among all treatments, while the activity of CK showed an increasing trend. Compared with CK, the activity of IAAO in 10 mmol·L-1 treatment peaked at 2 d. Using immune colloidal gold technique to analysis the in-situ distribution of IAA, we found under 10 mmol·L-1 NaCl treatment the IAA mainly distributed in cambium at 2 d, in root primordium at 6 d, and in the adventitious root vascular tissue at 10 d. In conclusion, 10 mmol·L-1NaCl treatment can promote adventitious roots of cherry tissue culture seedlings, and provide a reference for further research on the occurrence and regulation mechanism of adventitious roots.

Key words: cherry, rootstock, adventitious rooting, enzymatic activity, immunohistochemical

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