Kinetin-Mediated Prolongation of Viability in Recalcitrant Sal (Shorea robusta Gaertn. f.) Seeds at Low Temperature: Role of Kinetin in Delaying Membrane Deterioration during Desiccation-Induced Injury |
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Authors: | K S Krishna Chaitanya S C Naithani |
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Institution: | (1) Seed Biology Laboratory, School of Studies in Life Sciences, Pt. Ravishankar Shukla University, Raipur 492 010 (M.P.), India, IN |
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Abstract: | The effects of kinetin (6-furfurylaminopurine) on viability during storage of recalcitrant sal (Shorea robusta Gaertn. f.) seeds at low temperature (15°C) were investigated. The freshly mature sal seeds showed an absolute loss of viability
within 6–7 dah (days after harvest) when stored at ambient or at 15°C (control). Storage of these seeds at 15°C after kinetin
(10 ppm) treatment prolonged the viability period up to 35 days with 20% germination. The kinetin-treated seeds exhibited
100% germination up to 10 days compared with 3 days in controls. Measurements of leachate conductivity, ·O−
2 and lipid peroxidation registered gradual increases from 0 dah onward to 35 dah with significantly low levels compared with
controls. On the other hand, an enormous increase in superoxide dismutase activity was discernible for a longer duration (0–35
dah) in kinetin-treated seeds than in control seeds where it remained for 3 dah. The role of kinetin in prolonging seed viability
by reducing the loss of leachates, lipid peroxidation, ·O−
2, and enhancing of superoxide dismutase is discussed.
Received October 7, 1997; accepted January 27, 1998 |
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Keywords: | , Seed viability—,Oxidative stress—,Extension—,Kinetin recalcitrant–,Shorea robusta (Sal) |
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