Sailaja, K
(1998)
Effect of glycine betaine in the alleviation of abiotic stresses in groundnut genotypes.
PHD thesis, Acharya N G Ranga Agricultural University.
Supervisors
| Supervisors Name | Supervisors ID |
|---|
| Sarma, P S | ANGRAU |
| Nageswara Rao, R C | ICRISAT |
| Narasimha Rao, C L | ANGRAU |
| Khan, H A | ANGRAU |
| Nageswara Rao, T | ANGRAU |
Abstract
Many of the biotic and abiotic stresses faced by grain legumes contributr to the large
yield gap between potential and realzed yields. Abiotic stresses occurring at critical growth
stages in groundnut affect productivity by reducing the total dry matter, pod yield and
quality. Present study investigates thc role of glycine bctninc in nllevintiny cll'ccts of the
three major abiotic stresses i, e., drought, heat and salinity on selected groundnut genotypes.
The investigation was conducted in 3 phases (a) effect of betaine on tolerance of groundnut
seedlings to heat and salinity stress conditions, (b) effect of betaine on isolated plants
growing in pots subjected to drought, heat and salinity, and ( c) effect of betaine on tolerance
of groundnut genotypes to simulated drought under field conditions. The experiments were
conducted during 1996- 98 period at ICRISAT centre, Patancheru in laboratory, glass
house, growth chamber and field. (a) The seedlings were subjected to high temperature and
salinity stress conditions in laboratory with and without glycine betaine trcatmcnt, under
high temperature stress conditions, the seedlings with betaine treatment are able to produce
root and shoot lengths (34 and 40%) than seedlings without betaine treatment, in the non
induced treatments, there was a 122% greater growth in betaine treated seedlings compared
to untreated ones, correspondingly the gel electrophoresis results indicated that betaine
treatment was able to produce four new proteins with molecular weights of 76.4, 60.6, 54.6
and 16.5 kDa. Similarly under salinity stress conditions, the betaine treatment was able to
produce 30 and 32% more root and shoot growths. The protein profiles indicated that betaine
treatment was able to produce four new proteins with molecular weights of 65.4, 37.8, 35.4
and 16.5 kDa. These stress shock proteins which are produced under high temperature and....
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