Abstract
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.
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Claims 15
Claim · model-written summary
Heat treatment gave the highest mean germination of 82.86%.
Verbatim
e0“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.”
t0“Efficacy of dormancy breaking methods in paddy genotypes”
Claim · model-written summary
Heat treatment gave the highest seedling vigour index of 2753.
Verbatim
e0“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.”
t0“Efficacy of dormancy breaking methods in paddy genotypes”
Claim · model-written summary
Heat treatment gave the highest dehydrogenase activity of 0.0449.
Verbatim
e0“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.”
t0“Efficacy of dormancy breaking methods in paddy genotypes”
Claim · model-written summary
Heat treatment gave the highest alpha amylase activity of 12.14 mm.
Verbatim
e0“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.”
t0“Efficacy of dormancy breaking methods in paddy genotypes”
Claim · model-written summary
GA3 at 50 ppm increased vigour index from 985 in control to 2753.
Verbatim
e0“The vigour index increased to 2753 (GA3 @ 50 ppm) from 985 in control.”
t0“Efficacy of dormancy breaking methods in paddy genotypes”
Claim · model-written summary
Control had the highest EC leachates at 0.602.
Verbatim
e0“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.”
t0“Efficacy of dormancy breaking methods in paddy genotypes”
Claim · model-written summary
Heat treatment had the lowest EC leachates at 0.182.
Verbatim
e0“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.”
t0“Efficacy of dormancy breaking methods in paddy genotypes”
Claim · model-written summary
HNO3 at 1.5% yielded EC leachates of 0.202.
Verbatim
e0“HNO3 @ 1.5% (0.202)”
t0“Efficacy of dormancy breaking methods in paddy genotypes”
Claim · model-written summary
GA3 at 50 ppm yielded EC leachates of 0.250.
Verbatim
e0“GA3 @ 50 ppm (0.250)”
t0“Efficacy of dormancy breaking methods in paddy genotypes”
Claim · model-written summary
HNO3 yielded germination of 80.75%.
Verbatim
e0“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.”
t0“Efficacy of dormancy breaking methods in paddy genotypes”
Claim · model-written summary
GA3 yielded germination of 77.72%.
Verbatim
e0“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.”
t0“Efficacy of dormancy breaking methods in paddy genotypes”
Claim · model-written summary
HNO3 yielded dehydrogenase activity of 0.0446.
Verbatim
e0“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.”
t0“Efficacy of dormancy breaking methods in paddy genotypes”
Claim · model-written summary
GA3 yielded dehydrogenase activity of 0.0443.
Verbatim
e0“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.”
t0“Efficacy of dormancy breaking methods in paddy genotypes”
Claim · model-written summary
HNO3 yielded alpha amylase activity of 12.10 cm.
Verbatim
e0“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.”
t0“Efficacy of dormancy breaking methods in paddy genotypes”
Claim · model-written summary
GA3 yielded alpha amylase activity of 11.60 cm.
Verbatim
e0“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.”
t0“Efficacy of dormancy breaking methods in paddy genotypes”
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