Abstract
The present study was conducted at the laboratories of tissue culture of the
Date Palm Research Centre-Basra University to determine the effect of the
interaction between the culture filtrate of the antagonistic fungus Trichoderma
harzianum and the type of the explants, as well as the growth regulators on the
formation of lateral buds of the date palm in vitro.
The results of the present study were as follow:
1-The obtained results approved the positive effect of the culture filtrate of the
fungus T. harzianum in reducing the browning percentage of the treated callus,
the percent was 53.3% in the control treatment and reduced up to 36.6% in the
percent of 20% of the culture filtrate. The culture filtrate of 30% led to decrease
the time requirements for the formation of lateral buds up to 206.6 days
compared to other concentrations.
2- The results showed that the type of the explants had a significant effect on the
following tested parameters: the percentage of browning; lateral bud formation
and the time requirements for bud formation. The quarters of apical bud as
explants showed the most promising results for the above-mentioned parameters
compared to the area of the under meristem or auxiliary bud as explants. In
addition, the types of cytokinins had a positive effect on the induction of the bud
formation and decrease the time requirements for bud formation, especially with
the concentration of 2 mg/l of 2ip.
Date Palm Research Centre-Basra University to determine the effect of the
interaction between the culture filtrate of the antagonistic fungus Trichoderma
harzianum and the type of the explants, as well as the growth regulators on the
formation of lateral buds of the date palm in vitro.
The results of the present study were as follow:
1-The obtained results approved the positive effect of the culture filtrate of the
fungus T. harzianum in reducing the browning percentage of the treated callus,
the percent was 53.3% in the control treatment and reduced up to 36.6% in the
percent of 20% of the culture filtrate. The culture filtrate of 30% led to decrease
the time requirements for the formation of lateral buds up to 206.6 days
compared to other concentrations.
2- The results showed that the type of the explants had a significant effect on the
following tested parameters: the percentage of browning; lateral bud formation
and the time requirements for bud formation. The quarters of apical bud as
explants showed the most promising results for the above-mentioned parameters
compared to the area of the under meristem or auxiliary bud as explants. In
addition, the types of cytokinins had a positive effect on the induction of the bud
formation and decrease the time requirements for bud formation, especially with
the concentration of 2 mg/l of 2ip.