Physiological and sanitary quality of soybean seeds harvested at different periods and submitted to storage1

Zuffo, Alan Mário; Júnior, Joacir Mario Zuffo; Zambiazzi, Everton Vinícius; Steiner, Fábio

doi:10.1590/1983-40632016v4747576

Cited by 17 publications

(27 citation statements)

References 13 publications

(13 reference statements)

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“…However, Carvalho et al (2014) observed that not necessarily seeds of soybean cultivars with higher lignin contents show higher physiological quality. Zuffo et al (2017a) report that the germination potential tends to decrease as the seeds remain in the field after physiological maturity, a fact that did not occur in this study. However, these authors allowed a greater exposure time to the climatic storms, since seeds remained in the field until the 10 days after the reproductive R8.…”

Section: Resultscontrasting

confidence: 57%

Lignin and Activity Enzymatic in Susceptibility to Weathering Damage on Soybean Seeds

Castro¹,

Oliveira²,

Santos³

et al. 2019

JAS

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The aim of this study was to evaluate the isoenzyme activity in soybean seeds with different lignin contents subjected to harvest delay with artificial incidence of rainfall before and after storage. The experiment was conducted in a randomized block design with three replicates and a 5 × 3 × 2 factorial design, being five soybean cultivars, three harvest seasons (R8, R8 + one pre-harvest rainfall simulation, and R8 + two pre-harvest rainfall simulations), and two storage seasons (0 and 180 days). The pre-harvest rainfall simulations were performed through irrigation at the intensity of 30 mm of water until the pods were soaked and then collected after reached 18% water content. Seeds were evaluated regarding chemical composition (lignin content), physiological quality (germination, accelerated aging), and enzymatic activity (catalase, esterase, alcohol dehydrogenase, malate dehydrogenase, and isocitratelyase). The cultivar AS 7307 RR showed higher lignin content in the integument and higher physiological quality. The harvest delay and the artificial incidence of rainfallpromotesvariation in the electrophoretic pattern of the enzymes catalase, esterase, alcohol dehydrogenase; malate dehydrogenase, and isocitratelyase for stored and non-stored seeds.

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Section: Resultscontrasting

confidence: 57%

Lignin and Activity Enzymatic in Susceptibility to Weathering Damage on Soybean Seeds

Castro¹,

Oliveira²,

Santos³

et al. 2019

JAS

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“…Regarding seed sanity, the pathogens Colletotrichum sp., Phomopsis sp., Penicillium sp., Aspergillus sp., Fusarium sp., Semitectum sp., Cercospora kikuchii, and Alternaria sp were detected. These pathogens were also observed by Zuffo et al (2017a) in soybean seeds harvested at different times. Pathogens observed in the seeds of this study are the species of higher occurrence in Brazil; they cause significant production losses and decrease the seed quality of soybean (DANELLI et al, 2011).…”

Section: Source Of Variationmentioning

confidence: 78%

“…Seeds from plants sprayed with saflufenacil and grammoxone showed no statistical difference about harvest times. Diniz et al (2013a) and Zuffo et al (2017a) verified a higher incidence of Colletotrichum sp., Phenopsis sp., Penicillium sp., Aspergillus sp., Fusarium sp., Semitectum sp., Cercospora kikuchii, and Alternaria sp. in seeds harvested at 15 days after the R 8 stage.…”

Section: Source Of Variationmentioning

confidence: 91%

Does Chemical Desiccation and Harvest Time Affect the Physiological and Sanitary Quality of Soybean Seeds?

et al. 2019

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The use of desiccants may result in seeds with high physiological and sanitary quality due to the shorter period of exposure to field adverse conditions before the maturity stage for harvest. This study evaluated the effect of chemical desiccants and harvest times on the physiological and sanitary quality of soybean seeds. The experiment consisted of a randomized block design, arranged in a factorial scheme (4 × 3) + 1, with four replications. The first factor corresponded to four desiccation (grammoxone-2 L ha -1 , glufosinate -2 L ha -1 , reglone-1.5 L ha -1 , and saflufenacil-40 g ha -1 ) applied at the R 7.1 phenological stage (physiological maturity and 65% moisture with three harvest times (0, 7, and 14 days after the R 8 phenological stage) and additional treatment (control, application of water only, and harvest at the R 8 stage), with four replications. The use of the grammoxone desiccant and seeds harvested at seven days after the R 8 stage resulted in soybean seeds of the highest physiological quality, as observed for the variables germination, moisture damage, mechanical damage, and incidences of Colletotrichum sp., Phomopsis sp., Penicillium sp. Fusarium sp., Cercospora kikuchii, and Alternaria sp. Seeds harvested at the R 8 + 14 stage had the greatest losses in seed quality. The use of ammonium glufosinate and saflufenacil as desiccants is not recommended due to the reduction in the physiological quality of soybean seeds.RESUMO -O uso de dessecantes pode permitir a obtenção de sementes com máxima qualidade fisiológica e sanitária, devido o menor período em que as sementes ficam expostas as condições adversas no campo aguardando o estádio de maturação para colheita. O objetivo neste trabalho foi avaliar o efeito de dessecantes químicos e épocas de colheita sobre a qualidade fisiológica e sanitária em sementes de soja. O ensaio foi realizado em delineamento em blocos casualizados, disposto em esquema fatorial (4 × 3) + 1, sendo quatro herbicidas para a dessecação (gramoxone -2 L ha -1 , glufosinato -2 L ha -1 , reglone -1,5 L ha -1 , saflufenacil 40 g ha -1 ) aplicado no estádio fenológico R 7.1 (maturidade fisiológica e 65% de umidade), com três épocas de colheita (0; sete e 14 dias após o estádio fenológico R 8 -maturação plena), mais o controle (ausência de dessecante e colhida em R 8 ), com quatro repetições. O uso do dessecante gramoxone e as sementes colhidas sete dias após R 8 proporciona maior qualidade fisiológica de sementes de soja, conforme observado nas variáveis germinação, danos por umidade, danos mecânicos e a incidência de Colletotrichum sp., Phomopsis sp., Penicilium sp., Fusarium sp., Cercospora kikuchii e Alternaria sp.. A colheita de sementes no estádio R 8 +14 promove as maiores perdas na qualidade das sementes. O uso de glufosinato de amônio e saflufenacil como dessecantes não são recomendados, devido à redução na qualidade fisiológica das sementes de soja.Palavras-chave: Glycine max. Herbicidas. Maturidade fisiológica. Vigor.

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“…However, the intensity of these negative effects depends on the time that seeds remain in the field, genotype and climatic conditions, such as temperature and rainfall. The decrease of soybean seed quality in the field involves physical, chemical and physiological changes, as well as damage caused by microorganisms (Zuffo et al 2017). Minuzzi et al (2010) concluded that the highest seed quality can be obtained by performing the harvest at 7 days after the physiological maturity.…”

Section: Abstract Resumomentioning

confidence: 99%

Physiological and enzymatic changes in soybean seeds submitted to harvest delay1

Zuffo

Júnior

Carvalho

et al. 2017

Pesqui. Agropecu. Trop.

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Harvest delay may affect the physiological quality of soybean seeds due to the occurrence of unfavorable environmental conditions in the field. This study was conducted to investigate the physiological and enzymatic changes in soybean seeds submitted to harvest delay. A randomized block design, with eight seed harvest periods (0; 5; 10; 15; 20; 25; 30; and 35 days after the R8 phenological stage - full maturity) of the BRS 820 RR® cultivar, with four replicates, was used. At each harvest period, the moisture content, 1,000-seed weight, germination, seedling emergence, emergence speed index, accelerated aging, vigor and viability (tetrazolium test), electrical conductivity, enzymatic expression and seed yield were measured. Harvest delay up to 35 days after the R8 phenological stage do not affect the 1,000-seed weight and seed yield. The delayed harvest from the R8 stage results in increased damage by stink bugs and moisture. The harvest delay of seeds from the 10th day after the R8 stage impairs the seed vigor and, from the 15th day, seed germination. Seeds harvested with a delay after the R8 stage have lower expressions of the following isoenzymatic systems: malate dehydrogenase, alcohol dehydrogenase, esterase, isocitrate lyase and superoxide dismutase, especially after 15 days of harvest delay.

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Physiological and sanitary quality of soybean seeds harvested at different periods and submitted to storage1

Cited by 17 publications

References 13 publications

Lignin and Activity Enzymatic in Susceptibility to Weathering Damage on Soybean Seeds

Lignin and Activity Enzymatic in Susceptibility to Weathering Damage on Soybean Seeds

Does Chemical Desiccation and Harvest Time Affect the Physiological and Sanitary Quality of Soybean Seeds?

Physiological and enzymatic changes in soybean seeds submitted to harvest delay1

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