Physiological and biochemical changes during the loss of desiccation tolerance in germinating Adenanthera pavonina L. seeds

Soares, Giuliana Cristina Mourão; Dias, Denise Cunha Fernandes dos Santos; Faria, José Márcio Rocha; Borges, Eduardo E.L.

doi:10.1590/0001-3765201520140195

Cited by 15 publications

(6 citation statements)

References 47 publications

(20 reference statements)

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“…The importance of seed plants to humans is unquestionable and they have been studied for a wide range of aspects (Azevedo et al 1997, Carvalho et al 2011, Bevilaqua et al 2015, Dresch et al 2015, Sneideris et al 2015, Soares et al 2015, but in particular to their nutritional quality due to their consumption by animals and humans (Azevedo et al 1997). Cereals and legume seeds are significant plant protein sources in the human diet (Azevedo et al 1990).…”

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confidence: 99%

Soluble amino acid profile, mineral nutrient and carbohydrate content of maize kernels harvested from plants submitted to ascorbic acid seed priming

Alcântara¹,

Rizzi²,

Gaziola³

et al. 2017

An. Acad. Bras. Ciênc.

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Both the scientific community and society have shown interest in improving the content of amino acids, carbohydrates and mineral nutrients in maize because it represents an important staple food in many developing countries. Earlier studies demonstrated that the treatment of seeds using ascorbic acid (AsAseed priming) enhanced soluble carbohydrates, proteins and soluble amino acids for other species. AsA seed priming in maize showed the potential for reducing abiotic stresses. The effects on grain quality have not been previously demonstrated. This study investigated the impacts of AsA seed priming on maize kernel quality of seeds produced by the plants generated from the primed seeds, based on the amino acid profile and carbohydrate and mineral nutrient contents. AsA seed priming improved the maize kernel quality with respect to the ascorbate content, boron allocation, total carbohydrate content and increased soluble amino acid levels, including serine, tyrosine, alanine, valine, glutamate, arginine, proline, aspartate, lysine and isoleucine, whereas soluble methionine was decreased. Therefore, AsA seed priming can represent a potential technique for improving maize grain quality.

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confidence: 99%

Soluble amino acid profile, mineral nutrient and carbohydrate content of maize kernels harvested from plants submitted to ascorbic acid seed priming

Alcântara¹,

Rizzi²,

Gaziola³

et al. 2017

An. Acad. Bras. Ciênc.

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“…According to a series of authors, the desiccation tolerance is acquired due the activation of some proteins that accumulate in the final of maturation stages, such as the LEA proteins, which have the capacity to protect important macromolecules for the germination process, such as enzymes and lipids, according to evolution of the dehydration process, conferring to the seeds a greater cellular stability when they enter on the state of vitreous yet (Dalahaie et al, 2013;Kleinwächter et al, 2014;Righetti et al, 2015;Soares et al, 2015). At the drying temperature of 50 °C, it was observed that the capacity of the seeds to withstand desiccation only was attained after the physiological maturity ( Figure 5).…”

Section: Resultsmentioning

confidence: 99%

Physiological potential of soybean seeds after maturation and submitted to artificial drying

et al. 2017

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-This study evaluated the physiological potential of soybean seeds harvested during two seasons, on different maturation stages and subjected to different drying temperatures. The seeds were harvested at the maturations stages R7, R7 + 2, R7 + 3, R7 + 5, R7 + 6, R7 + 7, R7 + 10 and R7 + 12 days (55, 50, 45, 40, 35, 30, 25, and 20% of moisture content). For each maturation stage, seeds were divided into three samples: one sample was used to directly evaluate the physiological potential, and the others were dried at 40 °C and 50 °C, until reaching the moisture content of 11.5%. The physiological potential was evaluated through germination test, first germination count of germination, accelerated aging, modified cold, electrical conductivity and seedling emergence. The maximum physiological potential of seeds is achieved at the moisture content of 55%, the point that the dry matter is maximum. The seeds became tolerant to artificial drying approximately at the stage R7 + 7 days (30% of moisture content). Germination and vigor of the soybean seeds reduce as the drying temperature is increased from 40 °C to 50 °C, and this effect is enhanced when the seeds show moisture contents above 30%.Index terms: Glycine max L., seed development, germination, seed drying, vigor.Potencial fisiológico de sementes de soja durante a maturação e submetidas à secagem artificial RESUMO -O presente trabalho teve como objetivo avaliar o potencial fisiológico de sementes de soja provenientes de duas épocas de semeaduras, em diferentes estádios de maturidade, submetidas a diferentes temperaturas de secagem. As sementes foram colhidas nos estádios de maturação R7, R7 + 2, R7 + 3, R7 + 5, R7 + 6, R7 + 7, R7 + 10 e R7 + 12 dias (55, 50, 45, 40, 35, 30, 25 e 20% de teor de água). Para cada estádio, houve a separação das sementes em três partes, sendo uma diretamente submetida à avaliação do potencial fisiológico, e as outras secas a 40 °C e 50 °C, até atingirem o teor de água de 11,5%. O potencial fisiológico foi avaliado pela germinação, primeira contagem, envelhecimento acelerado, frio modificado, condutividade elétrica e emergência. O máximo potencial fisiológico é alcançado com 55% de teor de água, momento onde o acúmulo de massa seca é máximo. As sementes tornam-se tolerantes à dessecação próximo ao estádio R7 + 7 dias (30% de teor de água). Germinação e vigor das sementes de soja reduzem com o aumento da temperatura de secagem de 40 °C para 50 °C, sendo o efeito potencializado quando os teores de água estão acima de 30%.Termos para indexação: Glycine max L., desenvolvimento de sementes, germinação, secagem de sementes, vigor.1

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“…This reduction in the germination and vigor of the seeds of P. aquatica shows that the reduction of the water content negatively affects the physiological quality of the seeds, allowing to classify the seeds of this species as recalcitrant. The water loss in recalcitrant seeds triggers some deteriorating processes, such as protein denaturation, changes in the activity of peroxidase enzymes and damage to the membrane system, resulting in the complete loss of viability (Soares et al, 2015). Unbalanced metabolism and damage due to dehydration are the main causes of loss of viability of seeds during drying (Berjak & Pammennter, 2003).…”

Section: Discussionmentioning

confidence: 99%

Desiccation of Pachira aquatica Aubl. Seeds

Lima¹,

Gonçalves²,

Viana³

et al. 2018

JAS

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The conservation of seed quality during storage is important to perform the maintenance and conservation of germplasm banks. Several native species of Brazil are intolerant to desiccation to desirable levels for conservation during storage is necessary to develop specific technologies for their conservation. The objective of this research was to evaluate the physiological quality of Paquira aquatica seeds submitted to drying periods. The study was carried out using seeds of P. aquatica dried at a temperature of 35 ºC, the following exposure times: 0 (no drying), 24, 48, 72 and 96 hours. Before and after each period of drying samples for the evaluations, the data were submitted to analysis of variance and regressionat level of 5%. The seeds of P. aquatica were dispersed with very high water content and a small reduction in its physiological value agrees quality, allowing the seeds to characterize this as a recalcitrant species. The drying temperature is 35 ºC until the viable 24 hours after this period the water content of seed reduced from 55% to 43%, which was considered the critical level for desiccation of seeds of P. aquatica. Because it reduces the values of first count, germination, rate of germination and growth of seedlings.The drying temperature the 35 ºC until the viable 24 hours, whit small reduction in its physiological quality seed P. aquatica.

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Physiological and biochemical changes during the loss of desiccation tolerance in germinating Adenanthera pavonina L. seeds

Cited by 15 publications

References 47 publications

Soluble amino acid profile, mineral nutrient and carbohydrate content of maize kernels harvested from plants submitted to ascorbic acid seed priming

Soluble amino acid profile, mineral nutrient and carbohydrate content of maize kernels harvested from plants submitted to ascorbic acid seed priming

Physiological potential of soybean seeds after maturation and submitted to artificial drying

Desiccation of Pachira aquatica Aubl. Seeds

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