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Papers by Rathinavel Kailasam

Indian Journal Of Agricultural Research, 2015

Cotton Research, Regional Station, Coimbatore, India revealed that seeds coated with polymer “pol... more Cotton Research, Regional Station, Coimbatore, India revealed that seeds coated with polymer “polycote” or “ polyloc” @ 3 ml kg−1 + thiram @ 2.5 g kg−1+ super red @ 5 ml kg−1 + cruiser @ 5 g kg−1 packed in polythene bag (700 gauge ) and stored at ambient condition for 26 months was found superior in preserving seed quality viz., seed viability expressed in terms of germination and seedling vigour over untreated seeds. The percentage loss of viability was less rapid and at 26th month of storage it was 70% where as in control 56%. Less seed infection, high seedling vigour and field emergence was recorded in coated seeds.

Plant Growth and Development, 2002

A seed is a marvelous adaptation for survival of the embryo for long periods of time, often under... more A seed is a marvelous adaptation for survival of the embryo for long periods of time, often under adverse environmental conditions. Such survival allows opportunities for dispersal, both in time and in space. Seed development in flowering plants proceeds in three discrete, although continuous, stages: early, mid-, and late embryogenesis. In early embryogenesis, there is extensive cell division activity; also, the body plan of the embryo is laid down and endosperm development begins. The maturing seeds acquire a hard, resistant seed coat and, in the dry state, have a negligible metabolism and respiration rate. Four hormones play major roles in seed development. IAA and cytokinin concentrations are high in early embryogenesis when cell divisions occur at a high frequency. IAA also plays a role in patterning and polarity establishment in the young embryo. The role of gibberellins is not as clearly defined, but they seem to be involved in expansion growth of the embryo and endosperm, thus creating a sink for photoassimilates. Abscisic acid (ABA) plays a central role in several events that occur in mid- to late embryogenesis. It is responsible for the induction of desiccation tolerance and, in some seeds, of dormancy as well. It is also responsible for the synthesis/accumulation of at least some reserve proteins. Desiccation of seed seems to act as a switch, terminating the developmental and maturation program and turning on the germinative program, which requires rehydration of the seed and, in some species, breaking of dormancy.

International Journal of Current Microbiology and Applied Sciences, 2020

A study was carried out during kharif 2006-07 with twenty five Gossypium barbadense L genotypes t... more A study was carried out during kharif 2006-07 with twenty five Gossypium barbadense L genotypes to obtain information on genetic variability, heritability and genetic advance for seed cotton yield and its yield attributes. Significant differences were observed for characters among genotypes. High genetic differences were recorded for nodes/plant, sympodia, bolls as well as fruiting points per plant, seed cotton yield, lint index indicating ample scope for genetic improvement of these characters through selection. Results also revealed high heritability coupled with high genetic advance for yield and most of the yield components as well as fibre quality traits. Sympodia/plant, fruiting point /plant, number of nodes/plant, number of bolls per plant, and lint index were positively correlated with seed cotton yield per plant and appeared to be interrelated with each other. It is suggested that these characters could be considered as selection criteria in improving the seed cotton yield of G. barbadense, L genotypes.

Experiments conducted to elucidate the impact of polymer coating on viability of cotton seeds at ... more Experiments conducted to elucidate the impact of polymer coating on viability of cotton seeds at Central Institute for Cotton Research, Regional Station, Coimbatore, India revealed that seeds coated with polymer " polycote " or " polyloc " @ 3 ml kg-1 + thiram @ 2.5 g kg-1 + super red @ 5 ml kg-1 + cruiser @ 5 g kg-1 packed in polythene bag (700 gauge) and stored at ambient condition for 26 months was found superior in preserving seed quality viz., seed viability expressed in terms of germination and seedling vigour over untreated seeds. The percentage loss of viability was less rapid and at 26 th month of storage it was 70% where as in control 56%. Less seed infection, high seedling vigour and field emergence was recorded in coated seeds.

Seed development and maturation study is important to decide the period of complete maturity in c... more Seed development and maturation study is important to decide the period of complete maturity in cotton (Gossypium spp) to ensure good yield associated with good viability, seedling vigour and field performance. Physiological maturity is attained when the seeds gain maximum dry weight and the flow of nutrients from the mother plant into the seeds is cut off . Seed quality of cotton may be affected when the boll is retained on the plant for long after physiological maturity (Thiagarajan and Ramaswamy 1982), which is attained before the harvestable maturity. As very little information is available on this aspect, an experiment was conducted to study the boll, fibre and seeddevelopment pauern in upland (G. hirsutum L.) and tree or desi (G. arboreum L.) cottons.

Indian Journal Of Agricultural Research, 2015

Cotton Research, Regional Station, Coimbatore, India revealed that seeds coated with polymer “pol... more Cotton Research, Regional Station, Coimbatore, India revealed that seeds coated with polymer “polycote” or “ polyloc” @ 3 ml kg−1 + thiram @ 2.5 g kg−1+ super red @ 5 ml kg−1 + cruiser @ 5 g kg−1 packed in polythene bag (700 gauge ) and stored at ambient condition for 26 months was found superior in preserving seed quality viz., seed viability expressed in terms of germination and seedling vigour over untreated seeds. The percentage loss of viability was less rapid and at 26th month of storage it was 70% where as in control 56%. Less seed infection, high seedling vigour and field emergence was recorded in coated seeds.

Plant Growth and Development, 2002

A seed is a marvelous adaptation for survival of the embryo for long periods of time, often under... more A seed is a marvelous adaptation for survival of the embryo for long periods of time, often under adverse environmental conditions. Such survival allows opportunities for dispersal, both in time and in space. Seed development in flowering plants proceeds in three discrete, although continuous, stages: early, mid-, and late embryogenesis. In early embryogenesis, there is extensive cell division activity; also, the body plan of the embryo is laid down and endosperm development begins. The maturing seeds acquire a hard, resistant seed coat and, in the dry state, have a negligible metabolism and respiration rate. Four hormones play major roles in seed development. IAA and cytokinin concentrations are high in early embryogenesis when cell divisions occur at a high frequency. IAA also plays a role in patterning and polarity establishment in the young embryo. The role of gibberellins is not as clearly defined, but they seem to be involved in expansion growth of the embryo and endosperm, thus creating a sink for photoassimilates. Abscisic acid (ABA) plays a central role in several events that occur in mid- to late embryogenesis. It is responsible for the induction of desiccation tolerance and, in some seeds, of dormancy as well. It is also responsible for the synthesis/accumulation of at least some reserve proteins. Desiccation of seed seems to act as a switch, terminating the developmental and maturation program and turning on the germinative program, which requires rehydration of the seed and, in some species, breaking of dormancy.

International Journal of Current Microbiology and Applied Sciences, 2020

A study was carried out during kharif 2006-07 with twenty five Gossypium barbadense L genotypes t... more A study was carried out during kharif 2006-07 with twenty five Gossypium barbadense L genotypes to obtain information on genetic variability, heritability and genetic advance for seed cotton yield and its yield attributes. Significant differences were observed for characters among genotypes. High genetic differences were recorded for nodes/plant, sympodia, bolls as well as fruiting points per plant, seed cotton yield, lint index indicating ample scope for genetic improvement of these characters through selection. Results also revealed high heritability coupled with high genetic advance for yield and most of the yield components as well as fibre quality traits. Sympodia/plant, fruiting point /plant, number of nodes/plant, number of bolls per plant, and lint index were positively correlated with seed cotton yield per plant and appeared to be interrelated with each other. It is suggested that these characters could be considered as selection criteria in improving the seed cotton yield of G. barbadense, L genotypes.

Experiments conducted to elucidate the impact of polymer coating on viability of cotton seeds at ... more Experiments conducted to elucidate the impact of polymer coating on viability of cotton seeds at Central Institute for Cotton Research, Regional Station, Coimbatore, India revealed that seeds coated with polymer " polycote " or " polyloc " @ 3 ml kg-1 + thiram @ 2.5 g kg-1 + super red @ 5 ml kg-1 + cruiser @ 5 g kg-1 packed in polythene bag (700 gauge) and stored at ambient condition for 26 months was found superior in preserving seed quality viz., seed viability expressed in terms of germination and seedling vigour over untreated seeds. The percentage loss of viability was less rapid and at 26 th month of storage it was 70% where as in control 56%. Less seed infection, high seedling vigour and field emergence was recorded in coated seeds.

Seed development and maturation study is important to decide the period of complete maturity in c... more Seed development and maturation study is important to decide the period of complete maturity in cotton (Gossypium spp) to ensure good yield associated with good viability, seedling vigour and field performance. Physiological maturity is attained when the seeds gain maximum dry weight and the flow of nutrients from the mother plant into the seeds is cut off . Seed quality of cotton may be affected when the boll is retained on the plant for long after physiological maturity (Thiagarajan and Ramaswamy 1982), which is attained before the harvestable maturity. As very little information is available on this aspect, an experiment was conducted to study the boll, fibre and seeddevelopment pauern in upland (G. hirsutum L.) and tree or desi (G. arboreum L.) cottons.