D. Hanumanthappa S.N. Vasudevan K. Maruthi J.B. Maruthi Anil Sebastian


Paddy plays a pivotal role in Indian agriculture. It also possesses dormancy which needs to be studied thoroughly. Duration of dormancy usually ranges from 7 to 35 days. Environmental conditions that facilitate after-ripening in paddy is generally cool, moist substrate conditions referred to as stratification, chilling, or moist chilling, oxygen and other gases. 12 paddy genotypes were selected for the present investigation with various physical and chemical dormancy, breaking methods for freshly harvested seeds and the standard germination test was conducted thereafter. At 1% level of significance, heat treatment at 45°C for 72 h showed significantly highest mean germination (82.86%), seedling vigour index (2753), dehydrogenase activity (0.0449) and alpha amylase activity (12.14 mm) compared to other treatments and control.. The vigour index increased to 2753 (GA3 @ 50 ppm) from 985 in control. Significantly higher EC leachates was recorded in control (0.602) and lowest in heat treatment at 45°C for 72 hr (0.182) followed by HNO3 @ 1.5% (0.202) and GA3 @ 50 ppm (0.250) irrespective of the genotypes at 1% level of significance. Pre-heat treatment was followed by, HNO3 @ 1.5% and GA3 @ 50 ppm for germination (80.75%, 77.72%), dehydrogenase activity (0.0446,0.0443) and alpha amylase activity (12.10 cm,11.60 cm) respectively. The study is an exploration of cost effective treatment to alleviate seed dormancy in paddy with the background of biochemical observations for scientific explanation.


Download data is not yet available.


Metrics Loading ...




Dormancy, Ethrel, Germination, Heat treatment, Paddy

Abdul Waheed, Habib Ahmad and Fida Abbasi, M. (2012). Different treatment of rice seed dormancy breaking, germination of both wild species and cultivated varie-ties. Journal of Meteorological Environmental Science. 3: 551-560.
Abdul-Baki, A.A. and Anderson, J.D. (1973). Vigour deter-mination in soybean seed by multiple criteria. Crop Science. 1: 630-633.
Abdul-Baki, A.A. (1980). Biochemical aspects of seed vigor. Horticulture Science. 15: 761-765.
Ankaiah, R., Reddy, B.M., Roa, D.V.S.R. and Saibabu, K.G. R.S. (1993). Studied on seed dormancy in sunflower (Helianthus annus). Journal Research APAU. 21 (3): 142-146.
Antonio, R.V., Maria Das, Antonio, C.F., Joao, A.O. and Custodio, D.D. (2002). Action of gibberellic acid (GA3) on dormancy and activity of ?-amylase in rice seeds. Revista Brasileira de Sementes. 24: 43-48.
Asborno, M.D. Vidal, A.A., Benzusr and Beltrano, J. (1999). Rice: temperature and gibberllic acid effect on initial growth stages. Agro. Ciencia. 15 (1): 47-53.
Department of Agriculture cooperation and farmers welfare. (2014). www. Agricoop.nic.in.
Elizabeth Farnsworth. (2000). The ecology and physiology of viviparous and recalcitrant seeds. Annual Review of Ecology and Systematics. 31: 107-138.
Fisher, R.A. and Yates, F. (1963). Statistical tables for bio-logical, agricultural and medical research. Oliver and Boyd, London. 145.
Garzia-Maya, M., Chapman, J.M. and Black, M. (1990). Regulation of ?- amylase formation and gene expres-sion in developing wheat embryo. Planta. 181: 296-303.
Gowda, R., Swaranna, C., Devaraju, P.J. and Chandra, B.V. (2003). Dissipation of dormancy and its breaking meth-ods in KRH-2 Hybrid rice and its parental lines. Seed Res. 31 (1): 102-104.
Hendricks, S.B. and Taylorson, R.B. (1974). Promotion of seed germination by nitrate, nitrite, hydroxylamine, and ammonium salts. Plant physiol. 54: 304-309.
International Seed Testing Association. (2013). International rules for seed testing. Seed Sci. and Technol. 29 (supplement): 1-135.
Kota Janaiah, Kant, K. and Dadlani, M. (2006). Efficacy of dormancy breaking methods in indica rice varieties. Seed Res. J. 34: 45-49.
Lam Dong Tung and Edralina Serrano. (2011). Effects of warm water in breaking dormancy of rice seed. Omon-rice, 18: 129-136.
Liela,Y., Abbas, Z., Saman, S. and Fardin, K. (2005). Influ-ence of High and Low Temperature Treatments on Seed Germination and Seedling Vigour of Rice (Oryza sativa L.). World Applied Sci. J. 16 (7): 1015-1018.
Omkar Singh, D. and Kumar, A. (1999). The effect of plant growth regulator on seed quality in partially aged seeds of pigeon pea. Seed Res. 27 (1): 54-59.
Seshu, D.V. and Dadlani, M. (1991). Mechanism of seed dormancy in rice. Seed Sci. and Technol. 1: 187-194.
Shenoy, V.V., Seshu, D.V. and Dadlani, M. (1990). Associa-tion of laboratory assessed parameter with field emer-gence in rice. The non-anoic acid stress as a seed vigour test. Seed Res. 18 (1): 60-69.
Simpson, G.M. and Naylar, J.M. (1962). Dormancy studies in seeds of Avena fatuva and a relationship between maltase, amylases and gibberellins. Can. J. Bot. 40: 1959-1673.
Singh,Y. and Singh, U.S. (2008). Genetic diversity analysis in aromatic rice germplasm using agro- morphological traits. J. Plant Genet. Resour. 21 (1): 32-37.
Stephen Adkins and James Ross. (1981). Studies in wild oat seed dormancy. Plant Physiol. 67: 358-362.
Taegsu, N. and Byunwoo, L. (2000). Effect of seed soaked in GA3 and inorganic salt on mesocotyl and coleoptile elongation in rice, Korean J. Crop Sci. 45 (1): 52-54.
Citation Format
How to Cite
Hanumanthappa, D., Vasudevan, S., Maruthi, K., Maruthi, J., & Sebastian, A. (2016). Efficacy of dormancy breaking methods in paddy genotypes. Journal of Applied and Natural Science, 8(2), 634–639. https://doi.org/10.31018/jans.v8i2.850
More Citation Formats:
Research Articles