ENHANCEMENT OF GERMINATION AND SEEDLING PERFORMANCE OF LETTUCE UNDER HIGH TEMPERATURE STRESS BY SILK FIBROIN TREATMENTS: EFFECTS AND BIOCHEMICAL CHANGES

Lettuce (Lactuca sativa L. ‘Rapid’) seeds were treated with different concentrations of silk fibroin, i.e., 0 mg•L^-1, 20 mg•L^-1, 50 mg•L^-1, 100 mg•L^-1 and 200 mg•L^-1, for 4 hours, in order to improve the performance under high-temperature stress.
Germination testing was conducted under high-temperature stress (35°C/30°C, D/N). Silk fibroin was also applied to the seedlings at the 4-leaf stage before being subjected to heat stress.
Some biochemical tests, including the activities of superoxide dismutase (SOD), peroxidase (POD) and catalase (CAT), proline content and MDA content were determined for the young seedlings.
Results indicated that silk fibroin could effectively enhance germination of lettuce seeds.
Optimal effect resulted from a 50 mg•L^-1 silk fibroin solution.

XXVIII International Horticultural Congress on Science and Horticulture for People (IHC2010): International Symposium on Environmental, Edaphic, and Genetic Factors Affecting Plants, Seeds and Turfgrass

J. Zhang, X. Li, X. Zhang, J. Jia, J. Gu

lettuce, silk fibroin, high-temperature stress

https://doi.org/10.17660/ActaHortic.2012.938.6