Response of Organic Substance to Salt Stress in Different Eruca sativa Mill. Ecotypes

doi:10.11924/j.issn.1000-6850.casb16030179

Abstract

Abstract: In order to study the effect of organic osmolyte in salt stress, salt-tolerant and non-tolerant ecotypes of Eruca sativa Mill. were used as materials, the content of soluble protein, proline, soluble sugar in leaves were measured. The results showed that osmotic potential and soluble protein content had no significant difference between the two ecotypes, and conforming variation trend was not found between leaf osmotic potential and organic osmolyte. Under different salt stresses, the salt-tolerant plants had higher proline content than that of non-tolerant plants, and soluble sugar and free amino acid of high concentration were found in salttolerant plants under high salt stress. The content of soluble protein increased slowly in salt-tolerant plants with the increase of salt concentration, and the content of soluble protein decreased when the salt concentration ＞200 mmol/L. The results indicated that proline, soluble sugar and free amino acid played important roles in the responses to salt stress, and could be the standard to select salt-tolerant Eruca sativa.

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