[Effects of dissolved organic matter on copper absorption by ryegrass]

Ying Yong Sheng Tai Xue Bao. 2012 Aug;23(8):2295-9.
[Article in Chinese]

Abstract

In this study, dissolved organic matter (DOM) was extracted from earthworm casts and from the cattle manure with which the earthworms were fed, and a water culture experiment was conducted to study the effects of the DOM on the copper (Cu2+) absorption by ryegrass in the presence of different concentration Cu2+ (0, 5 and 10 mg x L(-1)). With the increasing concentration of Cu2+ in the medium, there was a gradual decrease in the dry mass of ryegrass shoots and roots and in the root length, surface area, volume, and tip number. In the presence of medium Cu2+, DOM increased the biomass of shoots and roots and the root length, surface area, volume, and tip number significantly. DOM reduced the Cu2+ concentration in roots, promoted the Cu2+ translocation from roots to shoots, and significantly increased the Cu2+ accumulation in shoots. The DOM from earthworm casts had better effects than that from cattle manure, and high concentration DOM had better effects than low concentration DOM.

Publication types

  • English Abstract
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Biodegradation, Environmental
  • China
  • Copper / isolation & purification*
  • Copper / metabolism
  • Lolium / metabolism*
  • Lolium / physiology
  • Oligochaeta / chemistry
  • Organic Chemicals / isolation & purification
  • Organic Chemicals / pharmacology*
  • Soil Pollutants / isolation & purification*
  • Soil Pollutants / metabolism
  • Solubility

Substances

  • Organic Chemicals
  • Soil Pollutants
  • Copper