Phosphate-assisted phytoremediation of arsenic by Brassica napus and brassica juncea: Morphological and physiological response

Nabeel Khan Niazi, Irshad Bibi, Ayesha Fatimah, Muhammad Shahid, Muhammad Tariq Javed, Hailong Wang, Yong Sik Ok, Safdar Bashir, Behzad Murtaza, Zulfiqar Ahmad Saqib, Muhammad Bilal Shakoor

Research output: Contribution to journalArticlepeer-review

90 Citations (Scopus)


In this study, we examined the potential role of phosphate (P; 0, 50, 100 mg kg-1) on growth, gas exchange attributes, and photosynthetic pigments of Brassica napus and Brassica juncea under arsenic (As) stress (0, 25, 50, 75 mg kg-1) in a pot experiment. Results revealed that phosphate supplementation (P100) to As-stressed plants significantly increased shoot As concentration, dry biomass yield, and As uptake, in addition to the improved morphological and gas exchange attributes and photosynthetic pigments over P0. However, phosphate-assisted increase in As uptake was substantially (up to two times) greater for B. napus, notably due to higher shoot As concentration and dry biomass yield, compared to B. juncea at the P100 level. While phosphate addition in soil (P100) led to enhanced shoot As concentration in B. juncea, it reduced shoot dry biomass, primarily after 50 and 75 mg kg-1 As treatments. The translocation factor and bioconcentration factor values of B. napus were higher than B. juncea for all As levels in the presence of phosphate. This study demonstrates that phosphate supplementation has a potential to improve As phytoextraction efficiency, predominantly for B. napus, by minimizing As-induced damage to plant growth, as well as by improving the physiological and photosynthetic attributes.

Original languageEnglish
Pages (from-to)670-678
Number of pages9
JournalInternational Journal of Phytoremediation
Issue number7
Publication statusPublished - 2017 Jul 3
Externally publishedYes


  • Arsenic speciation
  • Bioavailability
  • Contamination
  • Phytoextraction
  • Plant uptake
  • Remediation

ASJC Scopus subject areas

  • Environmental Chemistry
  • Pollution
  • Plant Science


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