biologia plantarum

Biologia plantarum 43:625-627, 2000 | DOI: 10.1023/A:1002816502941

Response of Scenedesmus Incrassatulus to Salt Stress as Affected by Methyl Jasmonate

I.S. Fedina^1,*, K.M. Benderliev¹

¹ Institute of Plant Physiology, Bulgarian Academy of Sciences, Sofia, Bulgaria e-mail

Exposure of the freshwater green alga Scenedesmus incrassatulus Bohl, strain R-83 to salt stress (175 mM NaCl) resulted in a reduction of its growth and ¹⁴CO₂ fixation and in an increase of accumulation of free proline and malondialdehyde (MDA). The accumulation of proline in the light was higher than in dark. NaCl significantly inhibited the Fe-induced release of organic chelators from the cells. Exogenously supplied 10^-4M methyl jasmonate (JA-Me) did not considerably change the ¹⁴CO₂ fixation, but increased proline and MDA accumulation in the cells and moderately inhibited the release of chelators from cells. JA-Me supplied simultaneously with NaCl helps the algae to counteract the salt stress.

Keywords: ion accumulation; iron chelators; malondialdehyde; photosynthesis; proline

Subjects: ion accumulation, salt stress; iron chelators, salt stress; malondialdehyde, salt stress; methyl jasmonate, salt stress; NaCl stress, methyl jasmonate; net photosynthetic rate, salt stress; photosynthetic rate, salt stress; proline, salt stress; salinity, methyl jasmonate; Scenedesmus incrassatulus

Published: December 1, 2000  Show citation