Effects of three microbial agents on the growth and powdery mildew resistance in micro-propagated plants of Toyonoka strawberry
DU An-nan
GAO Xiu-yan
LI He
ZHANG Zhi-hong
Abstract：Micro-propagated plants of strawberry cuhivar Toyonoka were used as materials for studying the effects of arbuscular mycorrhizal fungi (AMF), Trichoderma and effective microorganisms (EM) agents on growth and development, physiological and biochemical indicators, yield and powdery mildew resistance of plants cultivated on replanted soil or on mixed substrate. Results showed all 3 kinds of microbial agents improved the vigor of micro-propagated plants, increased the con-tents of chlorophyll, protein, soluble sugar and starch in leaves, enhanced the yield whether grown on replanted soil or mixed substrate. AMF agents had the most significant effects on the leaf area and chlorophyll content and about 1.5 times the control, and the yield grown on replanted soil and mixed substrate were 68.6% and 39.5% higher than that of control. The activity of β-1, 3-glucanase in AMF or Trichoderma treated plants was 2.6 to 5.5 times the control. Trichoderma agent had the most significant effect on increasing resistance to powdery mildew. The disease index of Tfichoderma-treated plants grown on replanted soil and mixed substrate were 36.7 and 17.2 respectively, while for the control were 51.8% and 59.1% respectively.
Keywords：StrawberryMicrobial agentsArbuscular mycorrhizal fungiTriehodermaDisease resistance
Publication Date：2009-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 638-643 )