The importance of physiological quality of seeds for agriculture

Costa, C. J.; Meneghello, Géri Eduardo; Jorge, M. H. A.; Costa, Edílson

doi:10.5747/ca.2021.v17.n4.a452

Cited by 8 publications

(7 citation statements)

References 47 publications

(49 reference statements)

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“…Thus, seeds WoT sown in soil with low water availability (maximum moisture of 20%) (Figure 1a) and high temperatures under CTS had high deterioration speed, which reduced their germination capacity at a rate of 0.5 p.p.hour -1 of the period of permanence in the soil. As highlighted by Costa et al (2021), seed germination comprises a succession of several ordered metabolic and Journal of Seed Science, v.44, e202244025, 2022 Table 1. Summary of the significance of the analysis of variance for the variables analyzed as a function of seed treatment (ST) and periods of permanence (PP) of seeds in the soil, in the experiments under no-tillage system (NTS) and conventional tillage system (CTS).…”

Section: Resultsmentioning

confidence: 99%

Soybean sowing under low water availability conditions: impacts of seed treatment and soil management

Bagateli¹,

Bagateli

Franco³

et al. 2022

J. Seed Sci.

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The aim of this work was to evaluate the impact of soybean sowing in soil with low water availability, under two management systems, using seeds with and without chemical treatment, on the physiological quality of seeds and seedling emergence. For this, two experiments were set up, one under no-tillage system (NTS) and the other under conventional tillage system (CTS), in a randomized block design, both in a 2x6 factorial scheme, with two seed treatment conditions (with and without) and six periods of seed permanence in the soil (0, 24, 48, 72, 96 and 120 h), with four replications. Germination, vigor, percentage of abnormal seedlings and percentage of dead seeds were evaluated. Seed treatment made it possible to maintain germination at acceptable levels for up to five days of permanence of the seeds in the soil, even in CTS. Sowing in soils with low water availability can lead to reductions of 0.2 and 0.5 percentage points per hour of exposure to dry soil in germination and vigor of soybean seeds, respectively.

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Section: Resultsmentioning

confidence: 99%

Soybean sowing under low water availability conditions: impacts of seed treatment and soil management

Bagateli¹,

Bagateli

Franco³

et al. 2022

J. Seed Sci.

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“…Fecha de cosecha Rendimiento de Cs (g) con la capacidad de germinación y supervivencia de plántulas en respuesta al vigor de su desarrollo en la planta madre y peso de plántula producida (Costa et al, 2021). Por otro lado, el P1000Cs es indicador de calidad, ya que en un cultivo sujeto a falta de nutrientes, agua, daños por heladas o granizo, cosecha precipitada, etc., se ve reflejado en el peso volumétrico (Ou et al, 2021).…”

Section: Especieunclassified

Atributos Físicos Y Fisiológicos De Semilla De Pastos Nativos Del México Árido

et al. 2022

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La siembra de gramíneas en temporal árido se basa, principalmente, en propágulos con baja calidad en densidad específica y pureza física, resultando en bajo éxito. Se evaluaron, en condiciones de laboratorio, atributos físicos y fisiológicos en propágulos de Bouteloua curtipendula, Leptochloa dubia, Digitaria californica, Setaria macrostachya y Pennisetum ciliare (exótico naturalizado) como testigo. Se determinaron atributos físicos como tamaño y forma de cariópside, pureza física de cariópside, peso volumétrico, peso de mil semillas y atributos de calidad fisiológica como vigor, viabilidad y germinación en dos tipos de propágulos (cariópside y propágulos comercializados tradicionalmente) con dos fechas de cosecha. Se verificó el cumplimiento de los supuestos del análisis de varianza. Las variables no normales se transformaron y se analizaron con estadística no paramétrica Kruskall-Wallis y chi-cuadrada. Los datos se analizaron con un modelo de diseño completamente al azar y prueba de Tukey (P ≤ 0.05) para separación de medias. Se encontraron diferencias (P ≤ 0.001) entre especies, fechas de cosecha y tipo de propágulo para longitud de radícula y plúmula. La viabilidad total fue diferentes entre especies (P = 0.0046) y especies × fechas de cosecha para cariópside y propágulos tradicionales (P ≤ 0.0001). No se encontraron diferencias para plántulas anormales entre especies y fechas de cosecha en cariópsides (P > 0.05). Las dimensiones de cariópside fueron diferentes (P ≤ 0.0001) entre especies. A cuatro días de prueba, la germinación de cariópsides fue de 80 % en B. curtipendula. Respecto al propágulo comercial, L. dubia y P. ciliare alcanzaron germinación de 70 y 60 % al octavo día. Las especies de zonas áridas y semiáridas poseen amplio potencial de mejora de atributos físicos y fisiológicos de propágulo mediante beneficio y eliminación total o parcial de brácteas accesorias, lo cual es un factor importante para mejorar el establecimiento de praderas en temporal semiárido mediante la habilitación de siembra mecanizada resultante y otros beneficios de la semilla de calidad.

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“…The initial establishment of seedlings is a fundamental step for achieving competitive and economically viable yields (Costa;Novembre, 2019).…”

Section: Introductionmentioning

confidence: 99%

“…Plant density is defined as the number of seeds distributed in the field at the time of sowing (Costa;Novembre, 2019). Usually, plant density is selected based on the results obtained in the seed analysis test.…”

Section: Introductionmentioning

confidence: 99%

“…Studies on seed vigor have demonstrated the importance and applicability of this physiological attribute, which is recommended to be considered particularly at sowing (Costa et al, 2021). High-vigor seeds are capable of tolerating a wide range of environmental conditions and present rapid and homogeneous emergence of seedlings (Marcos-Filho, 2015).…”

Section: Introductionmentioning

confidence: 99%

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Sowing density adjustment by rice seed vigor

et al. 2022

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The use of high-vigor seeds combined with seeding density adjustment at sowing is speculated to ensure high yields. However, certain doubts regarding the effect of this combined approach on rice cultivation remain owing to the tillering capacity. In this context, the present study aimed to determine the effects of seeding density adjustment according to vigor on the initial establishment of seedlings in the field. A physiological characterization was conducted using the germination test, vigor by accelerated aging, electrical conductivity, first count, shoot length, root length, total seedling length, and dry mass in the 2019/2020 and 2020/2021 growing seasons. The evaluations were conducted using a completely randomized design with four replications. Subsequently, the seed lots were selected, from which a fraction of seeds were submitted to artificial vigor reduction. Afterward, these seeds were sown in the main producing regions of the state of Santa Catarina, under a randomized block design with four replications. Three treatment groups were formed: one without density adjustment, one with adjustment by germination, and one with adjustment by vigor in accelerated aging. Twenty-one days after sowing, the number of emerged seedlings per unit area was determined. An interaction between the factors of adjustment for density and seed quality was observed. This was evidenced in the fact that even with the adjustment of density by vigor, the seed lot with lower quality presented the emergence of a lower number of seedlings, and the performance of these seeds was not equivalent to that observed in the lot with superior quality. Accordingly, it was concluded that the seeding density adjustment by vigor combined with the use of seeds with high-vigor is a suitable strategy for achieving a significant increase in plant emergence during the initial establishment in the field.

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The importance of physiological quality of seeds for agriculture

Cited by 8 publications

References 47 publications

Soybean sowing under low water availability conditions: impacts of seed treatment and soil management

Soybean sowing under low water availability conditions: impacts of seed treatment and soil management

Atributos Físicos Y Fisiológicos De Semilla De Pastos Nativos Del México Árido

Sowing density adjustment by rice seed vigor

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