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Photosynthetica

, Volume 47, Issue 2, pp 317–320 | Cite as

Effect of 24-epibrassinolide on the photosynthetic activity of radish plants under cadmium stress

  • S. AnuradhaEmail author
  • S. Seeta Ram Rao
Brief Communication

Abstract

The present study was conducted to study the effect of 24-epibrassinolide (EBL) on changes of plant growth, net photosynthetic rate, carbonic anhydrase (E.C. 4.2.1.1) and nitrate reductase (E.C.1.6.6.1) activities in the leaves of Raphanus sativus L. under the influence of cadmium (Cd) stress. Cd reduced plant growth, photosynthetic pigment levels, net photosynthetic rate and the activities of carbonic anhydrase and nitrate reductase. However seed application of EBL reduced the toxic effect of Cd on plant growth, pigment content, photosynthesis and enzyme activities. The studies clearly demonstrated the ameliorating effect of 24-epibrassinolide in mitigating the toxicity of Cd in plants.

Additional key words

cadmiun carbonic anhydrase carotenoids chlorophyll growth nitrate reductase photosynthesis radish seedlings 

Abbreviations

CA

carbonic anhydrase

Cd

cadmium

Chl

chlorophyll

DM

dry mass

EBL

24-epibrassinolide

FM

fresh mass

gs

stomatal conductance

HM

heavy metals

NR

nitrate reductase

PGRs

plant growth regulators

PN

net photosynthetic rate

Rubisco

ribulose-1,5-bisphosphate carboxylase/oxygenase

RWC

relative water content

TM

turgor mass

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Copyright information

© Springer Science+Business Media B.V. 2009

Authors and Affiliations

  1. 1.Department of BotanyOsmania UniversityHyderabadIndia

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