Allelopathy Journal

  • Year: 2007
  • Volume: 19
  • Issue: 2

Effects of Phosphorus levels on allelopathic potential of rice co-cultured with barnyardgrass

  • Author:
  • Lihua Shen1, Wenxiong Lin1,2,
  • Total Page Count: 10
  • DOI:
  • Page Number: 393 to 402

1Key Laboratory of Biopesticide and Chemical Biology, FAFU, Fuzhou, Fujian, 350002, C/O, Ministry of Education, China.

2Institute of Agroecology, Fujian Agriculture and Forestry University, Fuzhou, Fujian, 350002, China.

Abstract

Two allelopathic rice cultivars [PI312777 and non-allelopathic Lemont from U.S.A.] were used as the donor plants and barnyardgrass (Echinochloa crusgalli L.) as the receiver plant. Each rice cultivar was co-cultured with barnyardgrass in hydroponic culture with low phosphorus level (0.5mg P/L). The PI312777 exposed to low phosphorus stress, suppressed the growth, reduced the protective activities of superoxide dismutase (SOD) and catalase (CAT) enzymes, but increased the free radical contents and membrane lipid peroxidation in barnyardgrass. The barnyardgrass's root activity and uptake of nitrogen (N), phosphorus (P) and potassium (K) was decreased, leading to lower dry weight in barnyardgrass.

Keywords

Allelopathy, barnnyardgrass(Echinochloa crusgalli L.), rice (Oryza sativa L.), stress