Physiological and biochemical changes in seed of pigeonpea [Cajanus cajan (L.) Millsp.] during storage
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Date
2017
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Abstract
Present research was conducted to store two different seed lots (fresh and revalidated) of
pigeonpea cv. PAU 881 using four different packaging containers (cloth bag, cloth bag
containing drying beads, only desiccator and desiccator containing drying beads) under two
different temperature regimes i.e. ambient (~27.30C) and cold room temperature (~15.50C) to
observe changes in seed quality. Bimonthly data with respect to physiological and
biochemical seed quality parameters was observed to determine the quality of the stored
seeds. After 12 months of cold room storage conditions (temperature ~15.50C and relative
humidity ~55.5%), fresh seed lot with moisture content ~8.42%, when stored in desiccator
containing drying beads showed maximum seed quality i.e. germination (81.3%), vigour
index I (2990.21), vigour index II (21.41), total soluble sugars (46.77 mg/g), total soluble
proteins (218.83 mg/g) and least electrical conductivity (0.63 µmhos cm-1 seed-1). Under
same storage conditions, revalidated seed lot (which was already 12 months old) indicated
maximum seed quality upto 10 months of storage i.e. germination (76%), vigour index I
(2733.72), vigour index II (19.76), total soluble sugars (43.44 mg/g), total soluble proteins
(204.65 mg/g) and least electrical conductivity (0.72 µmhos cm-1 seed-1). Maximum
deterioration was observed in revalidated seeds when stored under ambient temperature
conditions in cloth bag.
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