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EFFECT OF GAMMA IRRADIATION AND ENCAPSULATED NANOSCALE PARTICLES ON SEED QUALITY AND STORAGE OF SORGHUM (Sorghum bicolor L. Moench)

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Title EFFECT OF GAMMA IRRADIATION AND ENCAPSULATED NANOSCALE PARTICLES ON SEED QUALITY AND STORAGE OF SORGHUM (Sorghum bicolor L. Moench)
 
Creator MADHAN MOHAN REDDY, CH
 
Contributor SREEDHAR, M
 
Subject productivity, manpower, horticulture, fruits, biological phenomena, land resources, research methods, harvesting, planting, diseases
 
Description Influence of fivegamma radiation doses generated from Co60 source of Gamma
chamber 5000 in combination with three nano scale particles along with control on seed
quality parameters of sorghum variety M35-1 was studied. Seed quality parameters viz.,
germination percentage, field emergence, speed of germination, peak value of
germination and coefficient of velocity of germination, root, shoot, seedling length,
vigour index, electrical conductivity, superoxide dismutase, seed moisture and seed
health were evaluated immediately after irradiation and up to nine months under storage
at ambient conditions. The experiment was laid out in a Completely Randomised
Design with factorial concept.
Marked significance of interaction effects was recorded for various seed quality
parameters studied immediately after nano scale particle treatment and exposing the
seed to selected doses of gamma rays. The results indicated that gamma doses up to 600
Gy were found to exercise positive influence in enhancing all the germination, seedling
and biochemical parameters in all nano scale particles viz., control, Glutathione and
Zinc oxide except Glutathione encapsulated Zinc oxide. However, these nano scale
particles differed significantly in their response to radiation doses and registered
variable values for seed quality parameters. The doses beyond 600 Gy had detrimental
effect by interfering with various seed quality attributes.
The analysis of bimonthly data at four intervals on seed storage potential up to
nine months indicated significant influence of storage period on all the seed quality
parameters including seed health. The interaction effects between storage period, nano
scale particles and gamma doses were also highly significant. Marked decline in
germination percentage, seedling dimensions and corresponding vigour index was
noticed over a period of nine months. However, The results also indicated that among
germination and seedling traits studied, peak value of germination, vigour index and
root length were the most sensitive seed quality parameters affected by ageing due to
storage under ambient conditions. These attributes registered higher reduction at the end
of nine months, indicating that these were the most sensitive characters affected during
storage thus, can serve as reliable parameters for assessing seed quality under the
influence of gamma radiation. The electrical conductivity values were also found to
increase significantly at the end of nine months of storage. The study revealed that,
combinations viz., control / 200, 600 Gy, Glutathione / 200, 400 Gy and Zinc oxide /
800 Gy performed better for various germination, seedling, biochemical, seed moisture
and seed health parameters (weevil infestation) evaluated during storage.The per se
performance of these interactions also indicated their superiority over remaining
treatments for these attributes.
From the results of the study it could be concluded that, gamma doses 200 and
400 Gy showed superiority in influencing all the seed quality parameters positively
during storage. Glutathione and Zinc oxide exhibited better response in desirable
direction than Glutathione encapsulated Zinc oxide to irradiation during storage in terms
of maintenance of seed quality particularly the germination percentage above Minimum
Seed Certification Standards prescribed for the crop. Glutathione encapsulated Zinc
oxide perform poorly for all seed quality parameters at all gamma doses. The superior
combinations identified in this storability study can be further validated for commercial
application.
 
Date 2017-01-03T11:59:02Z
2017-01-03T11:59:02Z
2015
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/94118
 
Language en
 
Relation D9891;
 
Format application/pdf
 
Publisher PROFESSOR JAYASHANKAR TELANGANA STATE AGRICULTURAL UNIVERSITY RAJENDRANAGAR, HYDERABAD