Effects of metabolites derived from Acremonium sp. BH0531 on defense enzymes of cucumbers infected by root-knot nematode
CAI Shuang
LIU Xiaoxia
SHEN Peijuan
HUANG Min
MENG Qingheng
SUN Jianhua
Abstract：Acremonium sp. BH0531, a marine fungus, has been proved with definite control efficiency on root-knot nema?tode. To explore the mechanisms in nematode control and growth improvement of cucumbers, pot experiments were conduct?ed indoors to assess the effect of metabolites from BH0531 on physiological indexes and defense enzymes of cucumbers in?fected by root-knot nematode. Each pot was handled with 40 mL fermentation broth of BH0531 in different concentrations:5, 10, 20, 40 mg·mL-1, and the control was treated with water instead. Then the amounts of malondialdehyde (MDA) and pro?line were measured, so were the specific activities of SOD, POD, CAT, PAL and PPO. The results showed that nematode in?fection increased MDA and proline contents and caused damage in cucumbers, whereas the metabolites effectively reduced the amount of MDA and proline and nearly alleviated the damage. On the other hand, the significant improvement in specific activity of SOD offset the damage of active-oxygen. In short, compared to the control, root-knot nematode infection leads to remarkable decrease in specific activities of POD, CAT, PAL and PPO in cucumbers, but the metabolites of BH 0531 can en?hance both the specific activities of these defense enzymes and the resistant level of the plants.
Keywords：CucumberRoot-knot nematodeMetabolitesDefense enzymesMalondialdehydeProline
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 9-13 )