Abstract

The present study demonstrated the effect of jasmonic acid (JA) on pigments and vitamins involved in photosynthesis or other metabolic activities during salt stress in Brassica napus L. Exposure to different concentrations of NaCl decreased pigments such as total chlorophyll, β-carotene, and lycopene to significant low levels but interestingly salinity increased total protein of B. napus L. seedlings, which was further ameliorated via JA supplementation. Importantly, JA alone and in combination with different concentrations of NaCl enhanced growth, pigments, vitamins over control and salt-alone treatment groups. The observations suggested that JA induced salinity tolerance in B. napus L. seedlings by improving the biosynthetic level of various pigments and vitamins.

Key words: Jasmonic acid, Brassica napus, Chlorophyll, Carotenoides, β –carotene.

Abbreviation

JA, Jasmonic acid; ROS, reactive oxygen species; TFs, trascription factors; PAP, production of anthocyanin pigmentation; EGL 3, enhancer of glabra 3; EL 3, extracellular loop; MYB 75, myeloblastosis 75; TTS, transparent testa; DAS, day after sowing; JAZs, jasmonate zim domain proteins.