|Table of Contents|

Effects of Combined Application of Brassinolide and Salicylic Acid on the Physiology of Tomato Seedlings Under Saline-alkali Stress

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2022年15
Page:
34-39
Research Field:
Publishing date:

Info

Title:
Effects of Combined Application of Brassinolide and Salicylic Acid on the Physiology of Tomato Seedlings Under Saline-alkali Stress
Author(s):
LI Xiang; ZHANG Yuting; LI Ying; ZHAO Wenhao; DUAN Zhiyong; JIN Yazhong
(College of Horticulture and Landscape，Heilongjiang Bayi Agricultural University，Daqing,Heilongjiang 163319)
Keywords:
brassinolide; salicylic acid; saline-alkali stress; tomato seedling
PACS:
-
DOI:
10.11937/bfyy.20215295
Abstract:
‘Kenfan No.1’ tomato was used as the test material，the tomato seedlings were treated with a compound salt solution which was prepared by mixing NaCl and NaHCO3 in a molar ratio of 1∶1 for saline-alkali stress treatment.The objective of this study was to evaluate the effects of different concentrations of brassinolide (BR) and salicylic acid (SA) on the physiology of tomato seedlings,in order to provide reference for the cultivation of tomato salt tolerance.The results showed that the tomato seedlings treated with 0.01 g?L-1 BR+0.20 g?L-1 SA had the highest proline (Pro) content，with a 32.79% increase；the catalase (CAT) activity was the largest，with a 62.88% increase；and the superoxide dismutase (SOD) activity was the largest，with a 30.37% increase.Tomato seedlings treated with 0.05 g?L-1 BR+0.05 g?L-1 SA had the least accumulation of malondialdehyde (MDA) at 5.428 mmol?L-1，and the accumulation of soluble sugar (SS) was the highest at 460.133 mg?kg-1.The activity of peroxidase (POD) in tomato seedlings treated with 0.05 g?L-1 BR+0.10 g?L-1 SA was the largest，an increase of 51.18%.To summarize，tomato seedlings treated with a combination of BR and SA at appropriate concentrations under saline-alkali stress could improve the scavenging ability of reactive oxygen species，improve osmotic regulation，increase the activity of antioxidant enzymes，and promote plant growth.Tomato seedlings grown in 0.01 g?L-1 BR compounded with 0.10 g?L-1 SA and 0.01 g?L-1 BR compounded with 0.20 g?L-1 SA had the best adjustment effect on salinity and alkali tolerance.

References:

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Last Update: 2022-09-09