V. Torfi; A. Danesh-Shahraki; K. Saeidi; M. Mobini-Dehkordi; P. Tahmasebi
Abstract
In order to evaluation the effect of plant growth promoting rhizobacteria on germination and primary growth of Darcocephalum moldavica L. an experiment in completely randomized design was conducted in the laboratory of agronomy science of Shahrekord University. Treatments were included control ...
Read More
In order to evaluation the effect of plant growth promoting rhizobacteria on germination and primary growth of Darcocephalum moldavica L. an experiment in completely randomized design was conducted in the laboratory of agronomy science of Shahrekord University. Treatments were included control (no bacterial inoculation), inoculated with Rhodococcus sp., Corynebacterium sp., Mycobacterium sp., Bacillus sp., Azotobacter sp., Pseudomonas putida and Pseudomonas fluorescens bacteria and inoculated with a mixture of all bacteria. Results showed that a significantly effect of bacterial treatments on germination percentage, germination rate, mean germination time, germination rate index, half maximal activation level (T50), length and radical weight, shoot and seedling, vigor index and Allometric coecifficient at 1% probability level. Bacillus sp. bacterial inoculation treatment had the most influence on mean germination time, germination rate index, half maximal activation level (T50), length and radical weight, shoot and seedling, and vigor index traits. Bacteria incubation treatment of Rhodococcus sp. and Pseudomonasfluorescence hadthe most effect on germination speed and germination percentage, respectively. The results showed that bacterial inoculation treatments as biopriming can improve the germination and primary growth indices of D. moldavica herb.
Z. Aghababnejad; A. Abbasi Surki; P. Tahmasebi
Abstract
There are several limitations in reproduction of Fritilaria imperilais using tissue tissue culture, lamination and bulb division. In this study, we designed a factorial experiment in a randomized complete block for evaluating the effects of several treatments such as cold duration (0, 4 and 8 weeks), ...
Read More
There are several limitations in reproduction of Fritilaria imperilais using tissue tissue culture, lamination and bulb division. In this study, we designed a factorial experiment in a randomized complete block for evaluating the effects of several treatments such as cold duration (0, 4 and 8 weeks), concentrations of GA3 (0, 250 and 500 ppm) and application time in three steps (before, during and after stratification). The results showed that the seeds were highly germinated using 8 weeks stratification compares to others. Moreover, 500ppm gibberllin before stratifications significantly increased percentage of germination, Vigor Index Ι, length of radical, plumule, seedling and seedling dry weight, however significantly decreased E50. The results also showed that increasing the GA3 from 250 to 500ppm had significantly positive effect on all the traits. This study indicates that 8 weeks stratification along with 500ppm is more likely to increase the germination index of Fritilaria imperilais.
