Impact of Foliar Application with Salicylic  Acid on Biochemical Characters of Canola Plants under Cold Stress Condition

In this study the effect of foliar application of salicylic acid on the chlorophyll content, antioxidant enzymes activity, and the content of solute protein and proline were investigated in two canola varieties (Brassica napus L., cv ‘RGS’ and ‘Licord’) leaves during 0, 24, and 48 hours after salicylic acid treatment. The results showed that the content of total chlorophyll was decreased in ‘RGS’ cultivar during the experiment and this process was related with increasing of salicylic acid concentration. The activity of superoxide dismutase, peroxidase, and also lipid peroxidation were increased significantly after 48 hours compared with the first day. The results of catalase activity showed that, this trait was decreased 24 hours after salicylic acid treatment and this decrease was related with salicylic concentration. The content of protein in both cultivars slightly changed and plants treated with salicylic acid had more protein content, by contrast proline was greatly affected by salicylic acid treatment and its content was the highest 24 hours after treatment. According to the present findings the application of salicylic acid has useful effects on the biochemical traits of Brassica napus cultivars. Therefore it may be effective for the improvement of plant growth in cold regions.

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Contrastive response of Brassica napus L. to exogenous salicylic acid, selenium and silicon supplementation under water stress

Archives of Biological Sciences ◽

10.2298/abs140411006h ◽

2015 ◽

Vol 67 (2) ◽

pp. 397-404 ◽

Cited By ~ 3

Author(s):

Ghader Habibi

Keyword(s):

Lipid Peroxidation ◽

Salicylic Acid ◽

Drought Stress ◽

Brassica Napus ◽

Foliar Application ◽

Dry Mass ◽

Total Chlorophyll ◽

Brassica Napus L ◽

Positive Effect ◽

Exogenous Salicylic Acid

The present research was designed to determine the effects of exogenous salicylic acid (SA), selenium (Se) and silicon (Si) on the resistance of canola (Brassica napus L. cv Okapi) seedlings to salt stress. Foliar application of SA (0.1 mM) in canola plants under drought stress for 25 days exhibited a significantly positive effect on shoot dry mass and raised the levels of total chlorophyll as well as boosting the activity of superoxide dismutase (SOD) and catalase (CAT). In addition, soil application of silicon (0.35 g Na2SiO3/kg soil) had ameliorative effects on canola root growth under drought. It is concluded that SA and Si enhanced the salt tolerance of canola by protecting the cell membrane against lipid peroxidation. However, the foliar application of Se (10 mg/l) had no ameliorative effects on canola growth and antioxidant capacity under drought stress, as could be judged by accumulation of malondialdehyde (MDA).

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Role of salicylic acid in heat stress tolerance in tri-genomic Brassica napus L.

Enero-Abril 2021 - Bioagro ◽

10.51372/bioagro331.2 ◽

2020 ◽

Vol 33 (1) ◽

pp. 13-20

Author(s):

Muhammad Awais Ghani ◽

Muhammad Mehran Abbas ◽

Basharat Ali ◽

Khurram Ziaf ◽

Muhammad Azam ◽

...

Keyword(s):

Salicylic Acid ◽

Heat Stress ◽

High Temperature ◽

Brassica Napus ◽

Biochemical Analysis ◽

Foliar Application ◽

Brassica Napus L ◽

Elevated Activity ◽

Heat Stress Tolerance

Tri-genomic Brassica napus L.wasdeveloped by the cross between Brassica napusand Brassica nigra. The crop is animportant source of vegetable seed oil in Pakistan,after cotton. The low oilseed rape yield is attributed to high temperature in the production zones. Interspecific hybridization using these two speciescan be helpful to produce heat resistant hybrids. On the other hand, it has been found that foliar application of different plant growth regulators can be used to reduce the heat stress in Brassica. The objectiveof this studywas to test the response of three different tri-genomic hybrids to high temperature stressat seedling stage. Seedlings were foliar sprayed with 0.13 mM salicylic acid (SA) prior to exposure tohigh temperatureat two true leaf stage. The plants were harvested after 30 days of sowing for growth and biochemical analysis. Plants ofV38 showed the highest values for all morphological traits and biochemical activities among the threehybrids. In general, plants exposed to the temperature stress exhibited a significant decline in growth, chlorophyll content and enzyme activity.Foliar application of SA significantly improved leaf and root biomass under heat stress.Further, antioxidativeenzyme activities significantly increased in response to SA either compared to control or to plants exposed to temperature stress.It is concluded thatapplication of salicylic acid elevated activity of antioxidative enzymes and was helpful in mitigating the detrimental effects of high temperature inoil seed rape.

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