Impact of pseudomonads and ethylene on the cadmium and nickel rhizofiltration of sunflower, squash, and Indian mustard

L. Simon, B. Bíró, S. Balázsy

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Three hydroponic experiments were set up to study the rhizofiltration of cadmium (Cd) or nickel (Ni) from artificially contaminated nutrient solution with sunflower, squash, or Indian mustard. After 48 h of exposure with 2 mg L-1 Cd-contaminated water, 460, 415, or 1092 μg Cd g-1 (dry weight) was detected in roots of 33-day-old sunflower and squash or in 50-day-old Indian mustard, respectively. As calculated, 1 g of root dry matter of the tested crop species removed 5.7-12.4% of total Cd content present in the nutrient solution. It was supposed that pseudomonads (soil rhizoplane bacteria) and the plant growth hormone ethylene can enhance the specific surface of roots and hence roots' metal adsorption capacity. As a trend, pretreatment of Indian mustard with Pseudomonas fluorescens bacteria enhanced slightly the Cd (from 1793 to 2346 μg g-1) or Ni (from 1088 to 1192 μg g-1) concentration of roots. Cadmium concentration in roots was also enhanced from 2694 to 3273 μg g-1 when the roots of Indian mustard were pretreated with Cd-tolerant rather than Cd-sensitive Pseudomonas cepacia. In spite of the occurrence of new root hairs, the pretreatment of roots with ethylene proved to be ineffective in enhancement of the Cd rhizofiltration capacity of Indian mustard.

Original languageEnglish
Pages (from-to)2440-2455
Number of pages16
JournalCommunications in Soil Science and Plant Analysis
Volume39
Issue number15-16
DOIs
Publication statusPublished - Sep 2008

Fingerprint

squashes
Brassica juncea
phytoremediation
Nickel
nickel
Cadmium
ethylene
Helianthus annuus
cadmium
nutrient solutions
Bacteria
pretreatment
rhizoplane
Burkholderia cepacia
bacterium
nutrient
hydroponics
bacteria
root hairs
Pseudomonas fluorescens

Keywords

  • Cadmium and nickel rhizofiltration
  • Ethylene
  • Indian mustard
  • Pseudomonads
  • Squash
  • Sunflower

ASJC Scopus subject areas

  • Soil Science
  • Agronomy and Crop Science
  • Plant Science
  • Analytical Chemistry

Cite this

Impact of pseudomonads and ethylene on the cadmium and nickel rhizofiltration of sunflower, squash, and Indian mustard. / Simon, L.; Bíró, B.; Balázsy, S.

In: Communications in Soil Science and Plant Analysis, Vol. 39, No. 15-16, 09.2008, p. 2440-2455.

Research output: Contribution to journalArticle

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