Osmoconditioning of Soybean Seeds to Improve Performance at Suboptimal Temperatures<sup>1</sup>

Knypl, J. S.; Khan, Aman Ullah

doi:10.2134/agronj1981.00021962007300010025x

Cited by 36 publications

(23 citation statements)

References 6 publications

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“…Such injury due to rapid uptake of water in legumes is a well documented phenomenon. The use of polyethylene glycol osmoticum has successfully overcome soaking injury by reducing the water uptake in soybean (KNYPL andKHAN 1981, SAHA andBASU 1982). In the present study, ME-D and MSC-D caused a slow increase in seed moisture content in an aerobic atmosphere, thereby alleviating soaking injury.…”

Section: Resultsmentioning

confidence: 99%

Maintenance of Vigour and Viability of Stored Pea (Pisum sativum L.) Seeds

Ramamoorthy¹,

Kalavathi²,

Paramasivam³

1992

J Agronomy Crop Science

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To determine the most efficacious midstorage hydration-dehydration treatment for preservation of vigour and viability of stored pea seeds {Pisum sativum L.), cultivar Bonneville, three methods viz., soaking-drymg, moisture equilibration-drying and moist sand conditioning-drying each at varying durations were evaluated. Irrespective of the durations of treatment, soaking-drying proved injurious. Though all durations of moisture equilibration excepting 72 and 120 h outperformed the control, yet 48 h proved to be the best. Preconditioning with moist sand (5 % moisture content) with seed at a ratio of 1 : 2.5 for different durations revealed 48 h to be the optimum, 72-96 h to be innocuous and thereafter injurious. Maintenance of membrane integrity and counteraction of lipid peroxidation may be the possible reasons for such beneficial effects.

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Section: Resultsmentioning

confidence: 99%

Maintenance of Vigour and Viability of Stored Pea (Pisum sativum L.) Seeds

Ramamoorthy¹,

Kalavathi²,

Paramasivam³

1992

J Agronomy Crop Science

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“…Seed cell membranes are semi-permeable means allowing water molecules to enter but preventing large molecules such as PEG into the seed cells. Knypl and Khan (1981) said that PEG molecules were found only outside the seed cell membrane, forming a thin layer surrounding the seed and acts as a buffer water content of seeds. This means that the use of PEG concentration of 25 g L -1 is restrictive but does not poison the process of seed imbibition.…”

Section: Germination and Vigor Indexmentioning

confidence: 99%

Response of some upland rice varieties to drought stress

2017

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Abstract. Purwanto E, Samanhudi, Yoniar Effendi Y. 2017. Response of some upland rice varieties to drought stress. Trop Drylands 1: [69][70][71][72][73][74][75][76][77]. The study aimed to examine the response of upland rice varieties at germination stage on several PEG (Polyethylene Glycol) 6000 concentration levels and to determine growth characteristics, physiological changes and yield of upland rice varieties under drought stress condition in a pot experiment. The study consisted of two experiments; the first was to study germination and early growth, and the second was to study the vegetative and generative growth of upland rice under drought stress condition. Experiments I and II were conducted in a completely randomized factorial design consisted of two factors and three replications. In experiments I, the first factor was upland rice variety comprised of 10 varieties and the second factor was PEG concentration consisted of four levels. In experiment II, the first factor was upland rice varieties that responded the best to drought stress in experiment I, and the second factor was the drought stress treatment consisted of moisture content at 100, 75, 50 and 25% field capacity. The research was conducted at the Laboratory of Plant Physiology and Biotechnology and the greenhouse of Faculty of Agriculture, Sebelas Maret University (UNS) Surakarta. The results showed that the germination and vigor index decreased with increasing levels of PEG concentration. PEG concentration of 25 g L -1 of water was the most optimum for screening drought resistant upland rice. In experiment I, Towuti, Situ Patengang, Kalimutu and Gajah Mungkur varieties showed the best response to drought stress. Increased intensity of drought stress resulted in a reduction of plant height, number of tillers, dry weight, relative growth rate, leaf area, number of grains hill -1 , 1000 grain weight, dry grain weight hill -1 and root dry weight. The drought stress also caused an earlier flowering date and increased percentage of empty grain. Based on the dry grain weight hill -1 , Towuti exhibited a higher drought resistance level than Gajah Mungkur, Situ Patenggang and Kalimutu.

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“…The few studies on soybean are encouraging, but more information is required before its use as a routine practice in seed technology (Knypl & Khan, 1981).…”

Section: Introductionmentioning

confidence: 99%

Biochemical changes associated to soybean seeds osmoconditioning during storage

Braccini

Reis

Moreira

et al. 2000

Pesq. agropec. bras.

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-A work was carried out with the purpose of verifying the biochemical changes associated to soybean (Glycine max (L.) Merrill) seeds osmoconditioning. Seeds of the UFV 10, IAC 8 and Doko RC cultivars harvested at R8 development stage and submitted to different treatments were used. The biochemical evaluations were performed during seed storage, after the hydration-dehydration process. Initially, seeds were osmoconditioned in a polyethylene glycol (PEG 6000) solution, with the osmotic potential of -0.8 MPa and 20 o C, for a period of four days. After that, seeds were dried back until the initial moisture content (10-11%) and stored in natural conditions for three and six months. Two controls were used: untreated seeds (dry seeds) and water soaked seeds. Seed changes in protein and lipid, hexanal accumulation and fatty acids contents were evaluated. The results showed that seed storage under laboratory natural conditions caused reduction in protein, lipid and polyunsaturated fatty acids content and promoted hexanal production. Storage periods reduced protein levels for all treatments, however the PEG 6000 treatment showed lower protein reduction. The soybean seed storage increased hexanal production, but hexanal levels were smaller with osmoconditioning comparing to the other imbibition treatments.Index terms: polyethylene glicol, protein, lipid, hexanal. ALTERAÇÕES BIOQUÍMICAS ASSOCIADAS AO CONDICIONAMENTO OSMÓTICO DE SEMENTES DE SOJA DURANTE O ARMAZENAMENTORESUMO -Foi conduzido um trabalho com o objetivo de avaliar as alterações bioquímicas associadas ao condicionamento osmótico das sementes de soja (Glycine max (L.) Merrill). Foram utilizadas amostras de sementes das cultivares UFV 10, IAC 8 e Doko RC, colhidas no estádio R8 e submetidas a diferentes tratamentos de embebição. As avaliações bioquímicas foram realizadas no decorrer do armazenamento das sementes, após estas serem submetidas ao processo de hidratação-desidratação. Inicialmente, as sementes de soja foram submetidas ao tratamento de condicionamento osmótico em solução de polietileno glicol (PEG 6000), com potencial osmótico de -0,8 MPa, a uma temperatura de 20 o C, por quatro dias. Posteriormente, as sementes osmocondicionadas foram novamente desidratadas, até atingirem o conteúdo de umidade inicial (10 a 11%), e armazenadas em condições normais do ambiente de laboratório, pelos períodos de três e seis meses. As sementes submetidas ao processo de hidratação-desidratação foram comparadas com duas testemunhas: sementes não-tratadas (secas) e sementes embebidas em água. Após cada período de armazenamento, as sementes foram avaliadas quanto às modificações nos teores de proteínas, lipídios, hexanal e ácidos graxos. Os resultados obtidos permitiram concluir que o armazenamento das sementes sob condições naturais de laboratório causou decréscimos nos teores de proteínas, lipídios e ácidos graxos poliinsaturados e promoveu aumento de hexanal. Os períodos de armazenamento reduziram os níveis de proteínas em todos os tratamentos; contudo, o tratament...

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Osmoconditioning of Soybean Seeds to Improve Performance at Suboptimal Temperatures¹

Cited by 36 publications

References 6 publications

Maintenance of Vigour and Viability of Stored Pea (Pisum sativum L.) Seeds

Maintenance of Vigour and Viability of Stored Pea (Pisum sativum L.) Seeds

Response of some upland rice varieties to drought stress

Biochemical changes associated to soybean seeds osmoconditioning during storage

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Osmoconditioning of Soybean Seeds to Improve Performance at Suboptimal Temperatures1

Cited by 36 publications

References 6 publications

Maintenance of Vigour and Viability of Stored Pea (Pisum sativum L.) Seeds

Maintenance of Vigour and Viability of Stored Pea (Pisum sativum L.) Seeds

Response of some upland rice varieties to drought stress

Biochemical changes associated to soybean seeds osmoconditioning during storage

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Osmoconditioning of Soybean Seeds to Improve Performance at Suboptimal Temperatures¹