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Action of gibberellic acid (GA3) on dormancy and activity of alpha-amylase in rice seeds Rev. bras. sementes
Vieira,Antônio Rodrigues; Vieira,Maria das Graças Guimarães Carvalho; Fraga,Antônio C.; Oliveira,João Almir; Santos,Custódio D. dos.
To evaluate the effectiveness of gibberellic acid (GA3) in breaking rice seed dormancy and the use of alpha-amylase enzyme activity as an indicator of the dormancy level, seed from the intensively dormant irrigated cultivar Urucuia were used. The seeds were submitted to a pre-drying process in a forced air circulation chamber under 40ºC during 7 days and submersed in 30 mL of GA3 solution under 0, 10, 30 and 60 mg/L H2O concentrations, during 2, 24 and 36 hours. After the treatments, the alpha-amylase activity was determined by using the polyacrilamide electrophoresis and spectrophotometry. At the same time, the germination test was made. The results indicated a gain in germination and in alpha-amylase activity in higher concentrations and soaking time of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Rice seeds; Dormancy; Germination; Gibberellic acid (GA3); Alpha-amylase.
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222002000200008
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ผลของการใช้อุณหภูมิสูงในการอบลดความชื้นต่ออายุการเก็บรักษาของเมล็ดพันธุ์ข้าว Thai Agricultural
Wilai Palawisut; Duangorn Ariyapruek; Pornsuree Kanjana.
Seed drying is one of the most important processes of seed production in rice. The purpose for reduce seed moisture without any effects on seed quality. The continuous-flow drier need higher temperature than bacth drier for increased drying rate was used in this experiment. In2008 at Pichit province, Five Experiments were conducted on 12 tons continuous-flow driers to find out the effected of temperature on quality of PSL2 and RD29 rice seed under different levels of temperature including 45, 50, 55 45 followed by 50 and 50 followed by 55°c compared with sun drying method. In2009 at Suphan Buri province, PSL2 rice seeds were used on 30 tons ontinuous-flow driers to study in two experiments. First experiment 3 levels of temperature including 45, 50, 55°c...
Tipo: Collection Palavras-chave: Rice seeds; Temperature; Storability; Seed quality; ข้าว; การเก็บรักษาของเมล็ดพันธุ์; การลดความชื้นของเมล็ด; อุณหภูมิ; เครื่องอบ; ความแข็งแรงของเมล็ด.
Ano: 2011 URL: http://anchan.lib.ku.ac.th/agnet/handle/123456789/3100
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อิทธิพลของการใช้สารเคมีป้องกันกำจัดโรคไหม้คอรวงในแปลงผลิตเมล็ดพันธุ์ขาวดอกมะลิ 105 Thai Agricultural
Teerawat Suwannual; Jumrat Sunyo.
Studies was conducted to determine the effects of fungicide usage on rice blast disease, caused by Pyricularia grisea (Cooke) Sacc. [= Magnaporthe grisea (Hebert) Barr] on rice cultivar KDML105 in Mae Hong Son Province. The four fungicides usage were isoprothiolane (Fuji one) tricyclazol (Beam 75%wp) Azoxystrobin + Difenoconazole (Ortiva 32 SC and Carbendazim (Cardazin-F). The results showed the four fungicides were use in rice KDML105 to be more effective in suppressing blast and protecting yield, compared to control (non-treat). The fungicides that Azoxystrobin + Difenoconazole was moderately resistant to leaf and neck blast, with the lowest percentage unfilled grains per panicle and have highest yield (669 kg/rai) with compare to the other.
Tipo: PhysicalObject Palavras-chave: Rice; Rice seeds; Khow Dok Mali 105; KDML 105; Seed production; Neck blast; Plant disease; Fungicide; Mae Hong Son province; เมล็ดพันธุ์ข้าว; พันธุ์ขาวดอกมะลิ 105; การผลิตเมล็ดพันธุ์; เชื้อรา; โรคไหม้คอรวง; การป้องกันโรคพืช; สารป้องกันกำจัดโรคไหม้; สารเคมีกำจัดเชื้อรา; ประสิทธิภาพการป้องกันโรค; จ.แม่ฮ่องสอน.
Ano: 2014 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5665
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อิทธิพลของสภาพแวดล้อมต่อความแปรปรวนของลักษณะประจำพันธุ์ข้าวไม่ไวต่อช่วงแสง Thai Agricultural
Charun Khawhnuna; Anchalee Prasertsak.
Research was conducted in order to study the environmental effects on characteristic variation in the photoperiod sensitive rice varieties at Nakhon Si Thammarat Rice Research Center during 2011-2013. Rice varieties in the study were included Pathum Thani 1, Phitsanulok 2, RD31 and RD41. Results showed that rice grown in April having plant height, number of tillers per hill, number of panicles per hill and panicle length more than rice grown in January and July. The number of filled grains and yields were highest when grew in January. Rice grown in April had high percentage of unfilled grains. The influence of other climatic conditions did not show obviously effect on the growth of rice varieties in the study.
Tipo: PhysicalObject Palavras-chave: Genetic; Variation; Morphology; Environment; Characteristic variation; Rice seeds; Seed production; Photoperiod insensitive rice; Rice grown; พันธุกรรม; ความแปรปรวน; สัญฐานวิทยา; สภาพแวดล้อม; ลักษณะประจำพันธุ์; เมล็ดพันธุ์ข้าว; ข้าวไม่ไวแสง; การผลิตเมล็ดพันธุ์; พันธุ์รับรอง; ปริมาณน้ำฝน; ลักษณะทางพฤกษศาสตร์; การเจริญเติบโตของพืช.
Ano: 2014 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5668
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