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Effect of exogenous 5-aminolevulinic acid on seed germination and antioxidase activities of Perilla frutescens seedlings under NaCl stress / 中草药
Chinese Traditional and Herbal Drugs ; (24): 1194-1200, 2011.
Article in Chinese | WPRIM | ID: wpr-855588
ABSTRACT

Objective:

In order to get the method of improving the salt resistance of seeds and seedlings for Perilla frutescens under NaCl stress, seed germination and physiological characteristics of P. frutescens seedlings were studied.

Methods:

Several physiological indexes of P. frutescens seeds treated by 5-aminolevulinic acid (5-ALA) were measured. And other indexes of the seedlings like relative water content (RWC), the biomass, the content of soluble sugar, and malondialdehyde (MDA), the activities of superoxide (SOD), peroxidase (POD), and catalase (CAT) were also measured.

Results:

The germination indexes of P. frutescens seeds under NaCl stress have a obvious inhibition. But after the treatment at different concentrations of 5-ALA every germination index were all increased. And the seeds treated by 5-ALA with the concentration of 50 mg/L have the most significantly increase in every index. The germination vigor was 71.3%, the germination rate was 90.5%, the germination index and vigor index were 15.9 and 0.129 6, respectively. Every treatment of them coule improve the biomass and soluble sugar of the seedlings; The RWC of P. frutescens leaves decreased under NaCl stress, but after treated by 5-ALA, the rate of decrease has been relieved and the content of MDA in leaves was decreased. The activities of three enzymes including SOD, POD, and CAT were all increased. And the treatment of 5-ALA with the concentration of 50 mg/L got the maximin with 0.79, 7.69, and 5.84 U/mg, respectively.

Conclusion:

5-ALA with the appropriate concentration of 50 mg/L could significantly alleviate the damages to the seeds and seedlings of P. frutescens under NaCl stress and promote the salt resistance of the seeds and seedlings.

Full text: Available Index: WPRIM (Western Pacific) Language: Chinese Journal: Chinese Traditional and Herbal Drugs Year: 2011 Type: Article

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Full text: Available Index: WPRIM (Western Pacific) Language: Chinese Journal: Chinese Traditional and Herbal Drugs Year: 2011 Type: Article