Seed reserves reduction rate and reserves mobilization to the seedling explain the vigour of maize seeds

Andrade, Gisiane Camargo de; Coelho, Cileide Maria Medeiros; Padilha, Matheus Santin

doi:10.1590/2317-1545v41n4227354

Cited by 17 publications

(18 citation statements)

References 30 publications

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“…High vigor seeds show rapid emergence under unfavorable environmental conditions, with good initial seedling development and therefore greater dry weight accumulation (Mondo, Cicero, Dourado, Pupim, & Dias, 2013). Because these seeds have a high seed reserve utilization efficiency for mobilization of resources for the development of the embryonic axis, they result in higher weight seedlings (Andrade, Coelho, & Padilha, 2019).…”

Section: Resultsmentioning

confidence: 99%

Accelerated aging predicts the emergence of rice seedlings in the field

Garcia¹,

Coelho²

2021

Semina: Ciênc. Agrár.

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Selecting the most appropriate vigor test for rice to predict seedling emergence remains a challenge. This is mainly attributed to the diversity of available tests that evaluate vigor; however, there is a critical need for tests that can show a high correlation with field emergence. Thus, this study aimed to determine which vigor tests are the most efficient in predicting the emergence of rice seedlings, to facilitate correct selection for quality control analyses and pre-sowing for rice seed commercialization. Across two growing seasons, 2016/17 and 2017/18, different seed lots of ‘SCS122 Miura’ rice were subjected to vigor evaluations including germination test, electrical conductivity, cold test, low temperature germination, accelerated aging, root and shoot length, seedling dry weight, emergence speed, and emergence speed index, and greenhouse and field emergence tests. A completely randomized design with four replicates was used for the experiments. All statistical analyses were performed using R software. The germination rate for ‘SCS122 Miura’ seed lots in both growing seasons was greater than 80%. In both growing seasons, unlike the similar results obtained for field emergence, in the laboratory tests, differences were observed between these same seed lots. Electrical conductivity and emergence speed showed a negative correlation with greenhouse and field emergence. The vigor tests for accelerated aging, emergence speed, and dry weight are more efficient in predicting the emergence of rice seedlings. Among the tested methods, accelerated aging (41 °C for 120 h) is one of the most efficient for predicting the emergence of rice seedlings and the best option for laboratory analysis of quality control and pre-sowing owing to its practicality and time required for execution.

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Section: Resultsmentioning

confidence: 99%

Accelerated aging predicts the emergence of rice seedlings in the field

Garcia¹,

Coelho²

2021

Semina: Ciênc. Agrár.

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“…Da mesma forma, as sementes de maior tamanho formaram plântulas com maior densidade de biomassa (i.e., as plântulas apresentaram menor CP e maior MSP) em relação à classe de semente média (Tabela 2). Artigos na literatura ressaltam que o tamanho da semente apresenta correlação positiva com a formação de plântulas de maior massa seca (MTAMBALIKA et al, 2014;PEREIRA et al, 2015), sendo necessário utilizar outros parâmetros que não tenham correlação com a massa seca de sementes para determinar a mobilização das reservas e a qualidade fisiológica (ANDRADE et al, 2019).…”

Section: Resultsunclassified

QUALIDADE FISIOLÓGICA DE SEMENTES DE Peltophorum dubium (Sprengel.) Taubert CLASSIFICADAS PELO TAMANHO

Padilha¹,

Donatto²,

Sobral³

2021

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Uma estratégia adaptativa das espécies florestais contra fatores imprevisíveis do ambiente é a oscilação na produção anual e no tamanho das sementes. Neste sentido, diversos estudos têm buscado investigar a influência do tamanho das sementes na germinação e vigor. As pesquisas sobre a relação entre tamanho e qualidade fisiológica das sementes podem contribuir para a criação de estratégias para a seleção de sementes destinadas ao processo de produção de mudas. O trabalho teve como objetivo avaliar a qualidade fisiológica das sementes de Peltophorum dubium classificadas pelo tamanho. O lote de sementes foi separado e pesado em três classes de tamanho: pequenas (< 0,0501 g), médias (0,0501 - 0,0600 g) e grandes (> 0,0600 g). O delineamento experimental foi o inteiramente casualizado com oito repetições. Os parâmetros avaliados foram: plântulas normais e anormais, sementes duras e mortas, primeira contagem de germinação, índice de velocidade de germinação, tempo médio de germinação, uniformidade de germinação, comprimento de plântulas, massa seca de plântulas e índice de vigor. Houve diferença significativa entre as variáveis analisadas, sendo possível identificar diferenças na qualidade fisiológica entre as classes de tamanho. Com os resultados foi possível identificar que as sementes com menor tamanho apresentaram maior intensidade de dormência; as sementes de tamanho médio demonstraram maior qualidade fisiológica e, as sementes de tamanho grande apresentam maior potencial para formação de plântulas com maior massa seca.

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“…These simple compounds are soluble and mobile; therefore, they are available for plant growth and development (Bewley et al, 2013). Differences among seeds from distinct plant species depend on the reserves accumulated during maturation (Erbaş et al, 2016), and the characteristics of using these compounds under thermal stress affect both vigor and formation of new seedling tissues (Andrade et al, 2019).…”

Section: Resultsmentioning

confidence: 99%

Molecular aspects during seed germination of Erythrina velutina Willd. under different temperatures (Part 1): reserve mobilization

et al. 2020

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Erythrina velutina Willd. (Fabaceae) is a tree species that bears social, ecological, and economic importance for northeastern Brazil, a region with frequent temperature variations. The objective of this work was to evaluate the mobilization of reserves during seed germination and seedling establishment of E. velutina at different temperatures, and how these mechanisms are affected in a thermal-stress situation. The seeds germinated at 5, 15, 25, 35, and 45 °C, and the physiological and biochemical aspects of reserve mobilization (starch, lipids, and total proteins) were assessed during seedling establishment. Germination, vigor, and the mobilization of reserves from the cotyledons to the embryonic axis are affected according to the incubation temperature. The temperature of 25 °C favors the mobilization of reserves during seed germination and seedling establishment in E. velutina. In a situation of thermal stress, high temperatures affect the establishment of the seedlings, whereas low temperatures compromise the mobilization of reserves.

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Seed reserves reduction rate and reserves mobilization to the seedling explain the vigour of maize seeds

Cited by 17 publications

References 30 publications

Accelerated aging predicts the emergence of rice seedlings in the field

Accelerated aging predicts the emergence of rice seedlings in the field

QUALIDADE FISIOLÓGICA DE SEMENTES DE Peltophorum dubium (Sprengel.) Taubert CLASSIFICADAS PELO TAMANHO

Molecular aspects during seed germination of Erythrina velutina Willd. under different temperatures (Part 1): reserve mobilization

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