Annals of Biological Research
Pooria Panahi, Davood Eradatmand Asli and MojtabaYousefi Rad
This experiment was conducted to study the effect of level and duration of pyridoxine application on yield of corn
(Zea MaysL.Var.NS 640).The experiment was laid out in a complete randomized block design in three replications.
The experiment had two factors, that the first factor was the different levels of pyridoxine application that was
included (0.02% , 0.04 % and 0.06 %) and second factor was duration of seed treatment by pyridoxine that included
(8,16 and 24 hours).The selected seeds were NS640 . Before planting the seeds were treated by pyridoxine levels
(0.02%, 0.04% and 0.06%) for (8, 16 and 24 hours) in the laboratory and after that the treated seeds planted
subsequently. Results of variance analysis of data in this investigation showed that effect of different level of
pyridoxine was significant at 1 % level on grain yield, harvest index and 1000 grain weight. Also according to
results of mean comparison, it was observed that there is significantly variation between levels of pyridoxine on
grain yield, harvest index and 1000 grain weight, as the highest was at second level of pyridoxine and the lowest
was at first level of pyridoxine. Also the result of mean comparison interactional effect of different levels of
pyridoxine application and seed treatment duration showed significantly variation on grain yield, harvest index and
1000 grain weight. As the highest was obtained at second level of pyridoxine and second level of duration of
pyridoxine application and the lowest was obtained at the first level of pyridoxine and first level of duration of
pyridoxine application. The pyridoxine leaded to increase grain yield, harvest indexand 1000 grain weight.
According to the results of this investigation and research development in relation with study of the effect (external
treatment) of growth regulators that caused by external factor, can acquire better understanding about
physiological mechanisms in plants.