Iranian Journal of Horticultural Science

Iranian Journal of Horticultural Science

Growth responses and ion regulation of Agrostis stolonifera L. to trinexapac-ethyl under salinity stress

Document Type : Full Paper

Authors
Mehrdad Rasouli 1
Abdollah Hatamzadeh 2
Mahmood Ghasemnezhad 3
Habibollah Samizadeh Lahiji 3
1 Former Ph.D. Student, Faculity of Agriculture Science, University of Guilan, Rasht, Iran
2 Professor, Faculity of Agriculture Science, University of Guilan, Rasht, Iran
3 Associate Professor, Faculity of Agriculture Science, University of Guilan, Rasht, Iran
10.22059/ijhs.2017.224415.1163
Abstract
Plant growth regulators can improve plant growth under environmental stress conditions. Effect of trinexapac-ethyl (TE) on growth response, soluble sugars content (SSc), proline and ion regulation were investigated in creeping bentgrass (Agrostis stolonifera L.) under salinity stress. The four salinity levels were applied at rte of control, 5, 10, and 15 dS/m with NaCl and TE treatments were applied with a hand sprayer on three times, biweekly at rate of 0, 60, 120, and 240 mg/100 m-2. Salinity, significantly increased SSc, proline content, leaf and root Na+, leaf K+, leaf Na/K and root Na/K rates but root K+, root length density and relative water content (RWC) decreased. Also, Foliar application of TE increased RWC, root length density, SSc, proline, leaf and root Na+ and K+ concentration, leaf and root Na/K rates. The results indicate that taking up more of the K+, maintaining a high K+ concentration in the leaves and reducing the Na+ being transferred from the roots to the shoots could be the mechanisms for Na+ and K+ regulation for salinity tolerance in creeping bentgrass.
Keywords
Grass
potassium
RWC
Sodium Chloride
soluble sugars
Subjects
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Iranian Journal of Horticultural Science
Volume 49, Issue 2
Summer 2018
Pages 529-538

  • Receive Date 05 January 2017
  • Revise Date 08 February 2017
  • Accept Date 15 February 2017