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Registros recuperados: 8
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Ethylene evolution and endo-beta-mannanase activity during lettuce seed germination at high temperature Scientia Agricola
Nascimento,Warley Marcos; Cantliffe,Daniel James; Huber,Donald John.
High temperatures during lettuce seed imbibition can delay or completely inhibit germination and the endosperm layer appears to restrict the radicle protrusion. The role of endo-beta-mannanase during lettuce seed germination at 35°C and the influence of ethylene in endo-beta-mannanase regulation were investigated. Seeds of 'Dark Green Boston' (DGB) and 'Everglades' (EVE) were germinated in water, or 10 mmol L-1 of 1-aminocyclopropane-1-carboxylic acid (ACC), or 10 mmol L-1 of aminoethoxyvinylglycine (AVG), or 20 mmol L-1 of silver thiosulphate (STS). Seeds were also primed in polyethylene glycol (PEG), or PEG + ACC, PEG + AVG, or PEG + STS. Untreated seeds germinated 100% at 20°C. At 35°C, EVE seeds germinated 100%, whereas DGB seeds germinated only 33%....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Lactuca sativa; Thermoinhibition; Thermodormancy; Endosperm weakening; Seed priming.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162004000200006
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Exogenous Application of Polyamines Improves Germination and Early Seedling Growth of Hot Pepper Chilean J. Agric. Res.
Aziz Khan,Hammad; Ziaf,Khurram; Amjad,Muhammad; Iqbal,Qumer.
Polyamines are low molecular weight organic compounds involved in diverse range of biological processes in all living organisms. Seed priming is a technique that improves seed performance by rapid and uniform germination with normal and vigorous seedlings. A laboratory study was performed to explore the benefits of seed priming with polyamines on seed germination and seedling growth of hot pepper (Capsicum annuum L.) Hot pepper seeds were primed in aerated solution of putrescine, spermine, or spermidine (25, 50, 75, and 100 mM) for 48 h at 25 ± 2 °C. Significant results (P < 0.05) were observed for different attributes of seed germination and early seedling growth. Polyamines priming resulted in earlier and synchronized germination via improving final...
Tipo: Journal article Palavras-chave: Seed priming; Capsicum annuum; Polyamines.
Ano: 2012 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392012000300018
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Intensification of rain-fed groundnut production in North Kordofan State, Sudan JARTS
Abdalla, Elgailani Adam; Aune, Jens B.; Osman, Abdelrahman K.; Idris, Aldaw M..
The main objective of this study was to evaluate intensification pathways for groundnut production in the marginal rain-fed environment of North Kordofan State, Sudan. The effect of intensification on yields was assessed in three different experiments. In the first experiment, the treatments were organised according to increasing level of intensification from the traditional production package to the improved production package (the ladder experiment). The complete improved package in the ladder approach consisted of increased density, new variety, seed priming, microdosing (0.6 g NPK per pocket) and mulching. Three levels of mulching and two levels of intensification constituted the second experiment (mulching experiment), while the third was an on-farm...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agronomy and Crop Science plant density; Variety; Seed priming; Micro-dosing; Mulching; Profitability.
Ano: 2018 URL: http://www.jarts.info/index.php/jarts/article/view/2018011554183
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Preventing thermoinhibition in a thermosensitive lettuce genotype by seed imbibition at low temperature Scientia Agricola
Nascimento,Warley Marcos.
Lettuce (Lactuca sativa L.) seed germination is strongly temperature dependent and under high temperatures, germination of most of genotypes can be erratic or completely inhibited. Lettuce seeds of 'Dark Green Boston' (DGB) were incubated at temperatures ranging from 15° to 35°C at light and dark conditions. Other seeds were imbibed in dark at 20°; 25°; 30°; and 35°C for 8 and 16 hours and then transferred to 20 or 35°C, in dark. Seeds were also incubated at constant temperature of 20° and 35 °C, in the dark, as control. In another treatment, seeds were primed for 3 days at 15°C with constant light. DGB lettuce seeds required light to germinate adequately at temperatures above 25°C. Seeds incubated at 20°C had 97% germination, whereas seeds incubated at...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Germination; Dormancy; Seed priming; Stand establishment.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000300010
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Salt tolerance and regulation of gas exchange and hormonal homeostasis by auxin-priming in wheat PAB
Iqbal,Muhammad; Ashraf,Muhammad.
The objective of this work was to assess the regulatory effects of auxin-priming on gas exchange and hormonal homeostasis in spring wheat subjected to saline conditions. Seeds of MH-97 (salt-intolerant) and Inqlab-91 (salt-tolerant) cultivars were subjected to 11 priming treatments (three hormones x three concentrations + two controls) and evaluated under saline (15 dS m-1) and nonsaline (2.84 dS m-1) conditions. The priming treatments consisted of: 5.71, 8.56, and 11.42 × 10-4 mol L-1 indoleacetic acid; 4.92, 7.38, and 9.84 × 10-4 mol L-1 indolebutyric acid; 4.89, 7.34, and 9.79 × 10-4 mol L-1 tryptophan; and a control with hydroprimed seeds. A negative control with nonprimed seeds was also evaluated. All priming agents diminished the effects of salinity...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Triticum aestivum; Hormonal balance; Plant growth regulators; Salinity; Seed priming; Stomatal regulation.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2013000900004
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Seed Pre-Treatment and Planting Geometry Positively Influence Herbicide Efficacy in Wheat (Triticum aestivum) Planta Daninha
ULLAH,A.; KHALIQ,A.; RIAZ,A.; NOOR,M.A.; FIAZ,S.; WAQAS,M.A.; ZAIN,M.; ASHRAF,U.; NAWAZ,A..
ABSTRACT: An experiment was conducted to evaluate the effect of priming, planting patterns and weed control treatments on weed spectrum, grain yield and profitability of wheat, during the growing season 2013-14. Two levels of seed priming (no priming, osmopriming) and planting patterns (broadcast, row plantation), and four levels of herbicide (pyroxulam at the rate of 14.08, 10.56, 7.04 and 7.521 g a.i. ha-1) were employed in the experiment, laid out in a randomized complete block design with split-split plot arrangement. The data regarding weed density, stand establishment, growth, and yield associated traits of wheat were recorded and analyzed by analysis of variance technique using statistical software DSAASTAT. The results revealed that the final...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Seed priming; Planting geometry; Herbicides; Weed spectrum.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100215
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การตรวจสอบความแข็งแรงของเมล็ดพันธุ์พริกหวานที่ผ่านการกระตุ้นการงอก โดยวิธีการเร่งอายุ Thai Agricultural
Boonmee Siri; Orranut Diumkhunthod; Potjana Srikaow.
The objective of this experiment was to investigate effect of accelerated aging after sweet pepper seeds were primed with two types of chemical solutions. The experiment was conducted at Seed Technology Laboratory Section in Seed Processing Plant, Faculty of Agriculture, Khon Kaen University. The sweet pepper seeds were soaked in two types of solutions: 1) 2.5%Chitosan 2) 2%KNO3 at 15oC for 5 hours. Primed seeds were subsequently subjected to accelerated aging at 42oC with relative humidity 100% for 10 days. The effects of seed priming on seed quality were determined after priming. The results showed that the primed seeds had seed germination percentage and speed of germination higher than non-primed seeds. It also showed that it had seed vigor more than...
Tipo: PhysicalObject Palavras-chave: Sweet pepper seed; Seed priming; Seed enhancement; Accelerate aging; Seed technology; Seed quality; Germination percentage; Seed vigour; Pregermination; Seed osmopriming; Seed treatment; เมล็ดพันธุ์พริกหวาน; การเตรียมการงอก; คุณภาพเมล็ดพันธุ์; การเร่งอายุเมล็ดพันธุ์; การกระตุ้นการงอก; การตรวจสอบความแข็งแรง; อัตราการงอกของเมล็ด; ความแข็งแรงของเมล็ด; การปรับสภาพก่อนเมล็ดงอก; ซีดออสโมพรามมิ่ง; ซีดทรีทเมนท์.
Ano: 2013 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5729
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ผลของการทำ Osmopriming ด้วยสารเคมีต่างกันต่อการเปลี่ยนแปลงคุณภาพเมล็ดพันธุ์มะเขือเทศลูกผสม Thai Agricultural
Boonmee Siri; Orranut Diumkhunthod.
The objective of this study was to investigatethe effects of osmopriming method with different chemicals on changes in quality of hybrid tomato seeds. The experiment was conducted at the Seed Quality Testing Laboratory Seed Processing Plant, Faculty of Agriculture, KhonKaen University. The tomato seeds were soaked in water plus PEG 6000 (-1.5 MPa) in combination with KNO3 (1% and 2%), KH2PO4 (1% and 2%) and vitamin C (1% and 2%) at 15°C for 5 days. After priming process, seed moisture content was subsequently reduced to their initial by therotating modified air seed dryer machine (Model KKU 40-2). Then, seed quality of primed seeds was tested quality. The results showed that primed seeds with PEG 6000 (-1.5 MPa)with vitamin C 2% had the highest germination...
Tipo: PhysicalObject Palavras-chave: Tomato seed; Hybrid varieties; Seed priming; Seed enhancement; Accelerate aging; Seed quality; Germination percentage; Seed vigour; Osmopriming; Chemical; PEG 6000; Polyethylene glycol; Potassium nitrate; KNO3; Potassium dihydrogen phosphate; KH2PO4; Vitamin c; เมล็ดพันธุ์มะเขือเทศ; พันธุ์ลูกผสม; การเตรียมงอก; สารเคมี; การแช่เมล็ด; การเร่งอายุเมล็ดพันธุ์; การกระตุ้นการงอก; คุณภาพเมล็ดพันธุ์; อัตราการงอกของเมล็ด; ความแข็งแรงของเมล็ด.
Ano: 2013 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5730
Registros recuperados: 8
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