Promotive role of 5-aminolevulinic acid on chromium-induced morphological, photosynthetic, and oxidative changes in cauliflower (Brassica oleracea botrytis L.)

Rehan Ahmad, Shafaqat Ali, Fakhir Hannan, Muhammad Rizwan, Muhammad Iqbal, Zaidul Hassan, Nudrat Aisha Akram, Saliha Maqbool, Farhat Abbas

Research output: Contribution to journalArticlepeer-review

49 Citations (Scopus)

Abstract

Chromium (Cr) is among the most toxic pollutants in the environment that adversely affect the living organisms and physiological processes in different plants. The present study investigated the effect of 15 mg L−1 of 5-aminolevulinic acid (ALA) on morpho-physiological attributes of cauliflower (Brassica oleracea botrytis L.) under different Cr concentrations (0, 10, 100, and 200 μM) in the growth medium. The results showed that Cr stress decreased the growth, biomass, photosynthetic, and gas exchange parameters. Chromium stress enhanced the activities of enzymatic antioxidants, catalase (CAT), superoxide dismutase (SOD), and peroxidase (POD) in response to oxidative stress caused by the elevated levels of malondialdehyde (MDA), hydrogen peroxide (H2O2), and electrolyte leakage (EL) in both roots and leaves of cauliflower. Chromium concentrations and total Cr uptake were increased in leaves, stems, and roots with increasing Cr levels in the culture medium. Foliar application of ALA increased the plant growth parameters, biomass, gas exchange parameters, and photosynthetic pigments under Cr stress compared to the treatments without ALA. Foliar application ALA decreased the levels of MDA, EL, and H2O2 while further improved the performance of antioxidant in both leaves and roots compared to only Cr-stressed plant. Chromium concentrations and total Cr uptake were decreased by the ALA application compared to treatments without ALA application. The results of the present study indicated that foliar application of ALA might be beneficial in minimizing Cr uptake and its toxic effects in cauliflower.

Original languageEnglish
Pages (from-to)8814-8824
Number of pages11
JournalEnvironmental Science and Pollution Research
Volume24
Issue number9
DOIs
Publication statusPublished - 1 Mar 2017
Externally publishedYes

Keywords

  • Antioxidant enzymes
  • Cauliflower
  • Chromium
  • Electrolyte leakage ALA
  • Hydrogen peroxide
  • Malondialdehyde
  • Photosynthesis

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