Synergistic effect of 24-epibrassinolide and salicylic acid on photosynthetic efficiency and gene expression in Brassica juncea L. under Pb stress

Authors

SUKHMEEN KAUR KOHLI
NEHA HANDA
ANKET SHARMA
VINOD KUMAR
PARMINDER KAUR
RENU BHARDWAJ

DOI

10.3906/biy-1707-15

Abstract

Lead (Pb) has wide-ranging effects on various essential physiological processes in plants including seed germination, root/shoot growth, photosynthetic efficiency, water status, and activities of enzymes. The effect of combined treatment of 24-epibrassinolide (10-7 M, EBL) and salicylic acid (1 mM, SA) on growth, photosynthetic attributes, and phenolic compounds in 30-, 60-, and 90-day-old plants of Brassica juncea L. under Pb stress (0.25 mM, 0.50 mM, and 0.75 mM) were studied. It was observed that Pb toxicity resulted in lowered growth and photosynthetic efficiency. The expressions of CHLASE, PSY, CHS, and PAL genes were altered. Presoaking treatment with the combination of EBL and SA for metal-stressed plants mitigated the adverse effects of metal stress by improving growth and levels of pigment and phenolic compounds.

Keywords

Brassinosteroids, chlorophyll, qRT-PCR, root growth, CHLASE gene

First Page

943

Last Page

953

Recommended Citation

KOHLI, SUKHMEEN KAUR; HANDA, NEHA; SHARMA, ANKET; KUMAR, VINOD; KAUR, PARMINDER; and BHARDWAJ, RENU (2017) "Synergistic effect of 24-epibrassinolide and salicylic acid on photosynthetic efficiency and gene expression in Brassica juncea L. under Pb stress," Turkish Journal of Biology: Vol. 41: No. 6, Article 10. https://doi.org/10.3906/biy-1707-15
Available at: https://journals.tubitak.gov.tr/biology/vol41/iss6/10