, Volume 255, Issue 3, pp 841–850 | Cite as

24-Epibrassinolide-induced alterations in the root cell walls of Cucumis sativus L. under Ca(NO3)2 stress

  • Ya-Hong An
  • Heng Zhou
  • Ying-Hui Yuan
  • Lin Li
  • Jin Sun
  • Sheng Shu
  • Shi-Rong Guo
Original Article


Brassinosteroids (BRs) can effectively alleviate the oxidative stress caused by Ca(NO3)2 in cucumber seedlings. The root system is an essential organ in plants due to its roles in physical anchorage, water and nutrient uptake, and metabolite synthesis and storage. In this study, 24-epibrassinolide (EBL) was applied to the cucumber seedling roots under Ca(NO3)2 stress, and the resulting chemical and anatomical changes were characterized to investigate the roles of BRs in alleviating salinity stress. Ca(NO3)2 alone significantly induced changes in the components of cell wall, anatomical structure, and expression profiles of several lignin biosynthetic genes. Salt stress damaged several metabolic pathways, leading to cell wall reassemble. However, EBL promoted cell expansion and maintained optimum length of root system, alleviating the oxidative stress caused by Ca(NO3)2. The continuous transduction of EBL signal thickened the secondary cell wall of casparian band cells, thus resisting against ion toxicity and maintaining water transport.


Cucumis sativus L. 24-Epibrassinolide Root Cell wall Lignin Ca(NO3)2 stress 







Brassonosteroid insensitive 1


bri1 EMS suppressor 1/brassinazole resistant 1


Phenylalanine ammonialyase










Lignin-forming anionic peroxidase


BRI1-associated kinase 1


bri1 suppressor 1


Brassinosteroid insensitive 2


Funding information

This work was supported by the National Natural Science Foundation of China (No. 31471869, No. 31401919 and No. 31272209), the Priority Academic Program Development of Jiangsu Higher Education Institutions (PDPA), China Agriculture Research System (CARS-25-C-03), and sponsored by the Research Fund for the Doctoral Program of Higher Education (20130097120015).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Supplementary material

709_2017_1187_MOESM1_ESM.xls (38 kb)
Supplementary Table 1 (XLS 38 kb)


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Copyright information

© Springer-Verlag GmbH Austria, part of Springer Nature 2017

Authors and Affiliations

  • Ya-Hong An
    • 1
    • 2
  • Heng Zhou
    • 1
    • 2
  • Ying-Hui Yuan
    • 1
    • 2
  • Lin Li
    • 1
    • 2
  • Jin Sun
    • 1
    • 2
    • 3
  • Sheng Shu
    • 1
    • 2
    • 3
  • Shi-Rong Guo
    • 1
    • 2
    • 3
  1. 1.College of HorticultureNanjing Agricultural UniversityNanjingPeople’s Republic of China
  2. 2.Jiangsu Province Engineering Laboratory for Modern Facility Agriculture Technology and EquipmentNanjingPeople’s Republic of China
  3. 3.Nanjing Agricultural University (Suqian) Academy of Protected HorticultureSuqianPeople’s Republic of China

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