EFFECT OF PRIMING TO IMPROVE STORABILITY AND VIGOUR IN ONION SEED (Allium cepa L.) 3632
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Date
2022-08
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JAU JUNAGADH
Abstract
A laboratory experiment was conducted in Department of Genetic and Plant
Breeding, College of Agriculture, JAU, Junagadh to study the “Effect of priming to
improve storability and vigour in onion seed (Allium cepa L.)”.
Seeds of two different varieties of red onion GJRO – 11 and Bhimashakti were
subjected to priming treatments; Control, vermiwash 1:10 dilution, GA3 @ 100 ppm,
humic acid @ 50 ppm, hydropriming and were stored in desiccators with silica gel for
different storage periods of 10 days, 70 days, 140 days, 210 days. Seeds were also
kept in ambient conditions to determine how the exterior environment affects vigour
indices. The seeds were studied for different characters like; germination percentage
(%), shoot length (cm), root length (cm), seedling length (cm), speed of germination,
fresh weight (mg), dry weight (mg), dry matter percentage (%), seed vigour index I
(length) and seed vigour index II (mass).
The result of experiment revealed that variety Bhimashakti out performed
GJRO – 11 in respect of all the quality parameters. When seeds were subjected to
priming, among them priming with GA3 @ 100 ppm, vermiwash 1:10 dilution and
humic acid @ 50 ppm gave increased results sequentially. In case of interaction effect
of variety and priming treatments, there was beneficial effect of priming treatment,
which resulted in more vigorous and physiological improvement for both varieties.
All priming treatments performed very well compared to control.
For storage periods (10 days, 70 days, 140 days, 210 days), the initial storage
period of 10 days marked better results. However, with the advancement of storage
period, seed quality parameters deteriorated. Gradual reduction in seed quality
parameters for Bhimashakti over the storage period was less, compared to GJRO-11.
Bhimashakti in mutual relation with storage period 10 days gave better results
for seeds stored in ambient conditions. There was a steep reduction in all the
parameters with the advancement of storage period to 210 days. Correlation analysis
with respect to relative humidity of ambient showed negative and highly significant
relationship with all the seed quality parameters except dry matter percentage.