engleski

Short-term salinity stress response of Brassica rapa seedlings

Salinity is one of the major abiotic stress causing significant losses in crops yield and quality. To understand stress response of commercially important cabbage, seedlings of B. rapa ssp. L. pekinensis were subjected to the short-term (24h) NaCl stress (50-200 mM). Significant inhibition of root growth and decrease in seedlings biomass, accumulation of sodium ions and proline were observed in a dose dependent manner. In vivo fluorescent imaging of stressed seedlings showed significant increase in levels of ROS (SO and H2O2) and glutathion, particularly in root in comparison to cotyledons. Changed redox potential of seedlings altered antioxidant enzymes activities and triggered hormonal response. The level of ABA was increased at higher salt concentrations while jasmonates (JA and Ja-Ile) were increased at the lowest. Increase in several hydroxycinnamic acids was observed in a dose dependent manner.

salinity ; cabbage ; ROS ; stress hormones ; phenolic acids

HRZZ-IP-2014-09-4359