STUDIES ON SEED PRIMING AND PRIMED SEED LONGEVITY IN ONION (Allium cepa L.) AND CAPSICUM (Capsicum annuum L.)
Loading...
Files
Date
10-09-13
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
University of Agricultural Sciences GKVK, Bangalore
Abstract
Seed priming is one of the most simple and economical intervention to enhance
the vigour of low quality seeds. Seed ageing affected all vigour related parameters viz;
mean seedling length, speed of germination, mean germination time and seedling vigour
index. When compared to fresh, ageing reduced the germination to the extent of 26.36
and 22.68% in onion and capsicum, respectively. With respect to effect of seed priming
on fresh and aged seeds, results indicated that GA3 followed by KNO3 showed significant
effect on all the vigour parameters but more in aged seeds than fresh. In case of onion,
there was an increase of germination to the extent of 7, 6, 4% due to GA3, KNO3 and
CaCl2 treatments when compared to control. Similar trend was also noticed in capsicum.
Since, primed seeds are desiccation sensitive they lose all viable parameters
within short span (one month) when stored under ambient condition. However, under
MAS, irrespective of the material, temperatures and atmosphere, germination and vigour
related parameters were maintained as fresh even after 6 months of storage. Biochemical
and molecular studies indicated wide variation in protein/esterase/peroxidase profiles
among treatments. However, no change either in DNA quality or quantity and RAPD
profiles was noticed.
Thus the results clearly revealed that modified atmospheric storage with vacuum
and stored at 100C was best for extending the primed seed longevity as evident from both
physiological and biochemical parameters. The Protein and enzyme markers can be used
as tools to identify loss of vigour during storage.
Description
Keywords
animal husbandry, livestock, mastitis, lactation, economic systems, byproducts, yields, biological phenomena, seasons, animal developmental stages