Growth retardants in wheat and its effect in physiological quality of seeds

Plant lodging in wheat has been controlled through growth retardants. However, there is lack of information on the effect of these products on the physiological quality of seeds. The objective of this study was to evaluate the physiological quality of wheat seeds obtained under different rates and application times of three growth retardants. The trial was carried out in Viçosa-MG, from May to September 2005, in a factorial and hierarchical scheme, in randomized block design with four replications and a control treatment. The treatments consisted of 500, 1000 and 1500g ha-1 of chlormequat; 40, 80 and 120g ha-1 of paclobutrazol and 62.5, 125 and 187.5g ha-1 of trinexapac-ethyl applied at the 6 or 8 growth stage based on the scale of Feeks and Large, and a control treatment without growth retardant application. Leaf application of growth retardants as chlormequat, paclobutrazol and trinexapac-ethyl did not affect the germination and vigor of wheat seeds.

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Yield and physiological quality of wheat seeds after desiccation with different herbicides

Journal of Seed Science ◽

10.1590/2317-1545v39n3172506 ◽

2017 ◽

Vol 39 (3) ◽

pp. 254-261 ◽

Cited By ~ 4

Author(s):

Fábio Henrique Krenchinski ◽

Victor José Salomão Cesco ◽

Danilo Morilha Rodrigues ◽

Vinicius Gabriel Caneppele Pereira ◽

Alfredo Junior Paiola Albrecht ◽

...

Keyword(s):

Seed Quality ◽

Block Design ◽

Dry Mass ◽

Wheat Crop ◽

Glufosinate Ammonium ◽

Randomized Block Design ◽

Seedling Length ◽

Physiological Quality ◽

Wheat Seeds

Abstract: Some desiccation techniques for harvesting wheat may affect seed quality. The objective of this study was to evaluate the effect of different desiccant herbicides applied to the wheat crop and their effects on the production and seed quality. The experiment was conducted with cultivar COODETEC 150 (CD 150) in two sites in Palotina (Paraná state, Brazil) with a randomized block design consisting of 7 treatments (desiccation herbicides) and 4 replications. Desiccation was realized when 50% of the plants were in stage 80 with seeds in powdery or mass consistency. The variables analyzed were percentage of moisture content after harvest, Yield, hectoliter weight, mass of 100 seeds, vigor, germination, fresh mass of seedlings, dry mass of seedlings and root length. The herbicides carfentrazone-ethyl and clethodim were the ones that promoted greatest reduction in vigor. The herbicide paraquat caused reduction in seedling length. There was a reduction in the mass of 100 seeds for glufosinate-ammonium, clethodim, diquat and carfentrazone-ethyl. Glufosinate-ammonium, paraquat, glyphosate, clethodim and diquat caused reduction in yield. Desiccation of Cultivar CD 150 at stage 80 is not recommended, since plant Yield and physiological seed parameters were adversely affected by herbicides.

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Use of growth retardants in wheat

Planta Daninha ◽

10.1590/s0100-83582009000200022 ◽

2009 ◽

Vol 27 (2) ◽

pp. 379-387 ◽

Cited By ~ 21

Author(s):

M.C. Espindula ◽

V.S. Rocha ◽

J.A.S. Grossi ◽

M.A. Souza ◽

L.T. Souza ◽

...

Keyword(s):

Plant Height ◽

Growth Stage ◽

Block Design ◽

Wheat Yield ◽

Fertilizer Application ◽

Growth Retardant ◽

Control Treatment ◽

Growth Stages ◽

Growth Retardants ◽

Randomized Block Design

In general, lodging has been controlled by restricting nitrogen fertilizer application and/or using short cultivars. Growth retardants can also be used to solve this problem.The objective of this study was to evaluate the effect of rates and application times of three growth retardants on Pioneiro wheat cultivar. The trial was carried out in Viçosa-MG, from May to September 2005, in a factorial and hierarchical scheme, in a randomized block design with four replications and a control treatment. The treatments consisted of 500, 1,000 and 1,500 g ha-1 of chlormequat; 62.5, 125 and 187.5 g ha-1 of trinexapac-ethyl and 40, 80 and 120 g ha-1 of paclobutrazol applied at growth stages 6 or 8, growth stage used on the scale of Feeks and Large, and a control treatment without growth retardant application. Only trinexapac-ethyl and chlormequat were efficient in reducing plant height; the effect of chlormequat and paclobutrazol on plant height was independent of the application time, but the trinexapac-ethyl at growth stage 8 produced shorter plant height than at stage 6. Increasing growth retardant rates produced shorter plant heights; chlormequat and paclobutrazol did not affect grain yield. However, the highest trinexapac-ethyl rates reduced wheat yield.

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Lignification of the plant and seed quality of RR soybeans sprayed with herbicide glyphosate

Revista CERES ◽

10.1590/s0034-737x2013000200019 ◽

2013 ◽

Vol 60 (2) ◽

pp. 286-292

Author(s):

Cristiane Fortes Gris ◽

Edila Vilela de Resende Von Pinho ◽

Maria Laene de Moreira Carvalho ◽

Rafael Parreira Diniz ◽

Thaís de Andrade

Keyword(s):

Seed Quality ◽

Lignin Content ◽

Block Design ◽

Accelerated Aging ◽

Soybean Seeds ◽

Randomized Block Design ◽

Physiological Quality ◽

Hand Weeding ◽

Herbicide Glyphosate

Differences in levels of lignin in the plant between conventional and transgenic cultivars RR has been reported by several authors, however, there are few studies evaluating the influence of spraying of glyphosate on the lignin in the plant and RR soybean seeds. The aim of this study was to evaluate the physiological quality of RR transgenic soybean seeds and the lignin contents of plants sprayed with the herbicide glyphosate. The assays were conducted both in greenhouse and field in the municipality of Lavras, MG, in the agricultural year 2007/08. The experiment was arranged in a splitplot design with four replicates, considering the treatments hand weeding and herbicide glyphosate as plots, and five RR soybean cultivars (BRS 245 RR, BRS 247 RR, Valiosa RR, Silvânia RR and Baliza RR) as splitplots. In the greenhouse, the cultivars tested were BRS 245 RR and Valiosa RR in a randomized block design with four replicates. The sprayings were carried out at stages V3, V7 and early R5 (3L/ha). The 1000 seed weight, mechanical injury, germination and germination velocity index, emergence velocity index, accelerated aging, electrical conductivity and water soaking seed test, lignin content in the seed coat, in the stem and legumes were determined. The spraying of glyphosate herbicide, in greenhouse and field, did not alter the physiological quality of seeds and the lignin contents in the plant.

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Physiological quality of soybean seeds stored after industrial treatments with different chemicals

Research Society and Development ◽

10.33448/rsd-v10i2.12279 ◽

2021 ◽

Vol 10 (2) ◽

pp. e6310212279

Author(s):

Renata Cristiane Pereira ◽

Lucas Caiubi Pereira ◽

Alessandro Lucca Braccini ◽

Larissa Vinis Correia ◽

Murilo Fuentes Pelloso ◽

...

Keyword(s):

Block Design ◽

Accelerated Aging ◽

Storage Period ◽

Original Data ◽

Soybean Seeds ◽

Randomized Block Design ◽

Seedling Length ◽

Physiological Quality ◽

Main Components

This study aimed to relate the smallest set of variables that compose the quality of soybean seeds lot under study, as well as to evaluate the influence of four industrial seed treatments and their respective slurry volumes on the physiological potential. The experiment was carried out in a completely randomized block design with 4 replicates and 24 treatments. The chemical treatments were: control (T1), micronutrient + polymer + drying powder (T2), bioregulator + polymer + drying powder (T3) and micronutrient + bioregulator + polymer + drying powder (T4). The seeds were stored for periods of 0, 15, 30, 45, 60 and 90 days and were subsequently evaluated for their physiological potential. In each storage period, the variable germination, first count, accelerated aging, emergence speed index, final emergence in the sand substrate, aerial part length, root length and total seedling length were evaluated. The main components of the standard germination test and first count were the ones that most contributed to explaining the variability of the original data. Increasing the volume of the slurry in the industrial seed treatment reduces the physiological quality of soybean seeds during storage.

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YIELD, PHYSIOLOGICAL QUALITY AND CHEMICAL COMPOSITION OF PHASEOLUS VULGARIS SEEDS, PRODUCED IN THE STATE OF RIO GRANDE DO SUL, BRAZIL

Revista Científica Rural ◽

10.30945/rcr-v22i2.3086 ◽

2020 ◽

Vol 22 (2) ◽

pp. 224-239

Author(s):

Tiago Pedó ◽

Angelita Celente Martins ◽

Dominique Dos Santos Delias ◽

Emanuela Garbin Martinazzo ◽

Vinícius Jardel Szareski ◽

...

Keyword(s):

Chemical Composition ◽

Starch Content ◽

Block Design ◽

Soluble Sugar ◽

Soluble Sugars ◽

Experimental Unit ◽

Agricultural Crops ◽

Randomized Block Design ◽

Physiological Quality

The objective of this study was to evaluate the yield and physiological quality of bean seeds in two agricultural crops, and the chemical composition of seedlings submitted to adverse temperatures during germination. For the field experiment, a randomized block design was used, using five genotypes, BRS Embaixador, IPR Tuiuiú, Guabiju, Carioquinha and Mouro, arranged in four replicates. The experimental units were composed of five lines with five meters in length, where 25 plants were randomly collected per experimental unit to measure the characters of interest. For laboratory testing the seeds produced were submitted to three temperatures (15, 25 and 35°C) during germination under controlled conditions. The evaluated characters were: grain yield, mass of a thousand seeds, germination, first germination count, starch content, soluble sugar, soluble protein and total amino acids. The data were submitted to analysis of variance and later compared by the Tukey test. Yield per plant revealed changes between the agricultural crops, as well as among the genotypes tested. Germination and the first germination count revealed higher magnitudes in seeds produced by BRS Embaixador, IPR Tuiuiu and Carioquinha genotypes. For all genotypes, protein and amino acid levels were higher in seedlings submitted to lower temperatures. The levels of starch and total soluble sugars were higher in seedlings produced at 35°C. Yield, seed physiological quality and chemical composition of seedlings are influenced by the crop and genotypes tested.

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Physiological quality of soybean seeds produced under artificial rain in the pre-harvesting period

Journal of Seed Science ◽

10.1590/2317-1545v38n1154236 ◽

2016 ◽

Vol 38 (1) ◽

pp. 14-21 ◽

Cited By ~ 9

Author(s):

Elisa de Melo Castro ◽

João Almir Oliveira ◽

Amador Eduardo de Lima ◽

Heloísa Oliveira dos Santos ◽

José Igor Lopes Barbosa

Keyword(s):

Lignin Content ◽

Block Design ◽

Seedling Emergence ◽

Accelerated Aging ◽

Moisture Damage ◽

Soybean Cultivars ◽

Randomized Block Design ◽

Physiological Quality ◽

Storage Times

Abstract: The objective of this experiment was to evaluate responses of soybean cultivars seeds (with different levels of lignin) considering harvest postponement under the incidence of water and the effect of storage. The experiment was conducted in Iraí de Minas, Brazil using a randomized block design with three replications under a 5 x 3 x 3 factorial arrangement, with five soybean cultivars (NK 7059 RR, SYN 1163 RR, SYN 9070 RR, AS 7307 RR and SYN 1283 RR), three harvesting periods (R8, R8 + one rain simulation in the pre-harvesting period and R8 + two simulations in the pre-harvesting period) under three storage times (0, 90 and 180 days). Seeds were evaluated for their chemical composition (lignin contents), the percentage of moisture damage using the tetrazolium test and physiological quality (germination, accelerated aging, conductivity test, seedling emergence and emergence index). Cultivar AS 7307 RR had the highest lignin content in the integument, the lowest percentage of damage by moisture and the highest physiological quality. Cultivars NK 7059 RR and SYN 1163 RR had the lowest lignin contents in the integument and the highest moisture damage. Electrical conductivity increased after storing all cultivars.

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Physiologic Quality and Biochemical Characters of Barley Seeds Produced Under Nitrogen Doses and Growing Environments

Journal of Agricultural Science ◽

10.5539/jas.v11n12p65 ◽

2019 ◽

Vol 11 (12) ◽

pp. 65

Author(s):

Lanes B. A. Jaques ◽

Ivan R. Carvalho ◽

Vinícius J. Szareski ◽

Henrique E. Rodrigues ◽

Ítala T. P. Dubal ◽

...

Keyword(s):

Block Design ◽

Accelerated Aging ◽

Dry Mass ◽

Human Consumption ◽

Limiting Factor ◽

Hordeum Vulgare L ◽

Barley Cultivars ◽

Randomized Block Design ◽

Physiological Quality

Barley (Hordeum vulgare L.) is considered one of the most important cereals, such as maize, rice and wheat, due to its multiplicity of usage, as much for human consumption as for feed. The Nitrogen is one of the main nutrients that influences the quality and productivity of barley seeds because it participates in numerous metabolic routes. It is a limiting factor of the production, the lack or the excess can bring consequence to the culture. In this manner, the present study aims to evaluate the influence of different nitrogen doses on the physiologic quality and biochemical characters of brewing barley seeds produced in two growing environments. The experiment was conducted in the 2017 crop season, in a randomized block design, organized in a factorial scheme, being 2 cultivation environment × 2 brewing barley cultivars × 4 nitrogen doses, disposed in four replicates. The physiological quality of the seeds was evaluated by germination, first counting of germination, accelerated aging, field emergence, shoot and root length, dry mass of shoot and root of seedlings, electrical conductivity (3, 6 and 24 hours) and isoenzymes. The growing environment promotes differences in the barley seeds physiologic quality. The nitrogen fertilizing, at dose of 120 kg ha-1, results in superiority in the physiologic quality of seeds. The cultivar BRS Cauê in both environments presented higher vigor. The nitrogen fertilizing alters the isoenzymatic expression of barley seedlings, creating variation in the bands intensity, at different nitrogen doses.

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Soil mulch in control of soil temperature and incidence of weeds in the production of crisphead lettuce

Research Society and Development ◽

10.33448/rsd-v9i11.9729 ◽

2020 ◽

Vol 9 (11) ◽

pp. e1869119729

Author(s):

Deisy Lúcia Cardoso ◽

Denise Renata Pedrinho ◽

Giselle Feliciani Barbosa ◽

Wolff Camargo Marques Filho ◽

José Antônio Maior Bono ◽

...

Keyword(s):

Soil Temperature ◽

Pennisetum Glaucum ◽

Block Design ◽

Control Treatment ◽

Soil P ◽

Brachiaria Ruziziensis ◽

Avena Strigosa ◽

Randomized Block Design ◽

Different Types

It was evaluated the effects of different types of mulching of soil in the cultivation of crisphead lettuce (Lactuca sativa L.), cultivar “Lucy Brown”, in the spring period, on weed control, soil temperature and productivity. The experiment was arranged in a randomized block design with four treatments and five replications in plots of 14.0m2. The following coverages were studied: Pennisetum glaucum L., Avena strigosa, Brachiaria ruziziensis, plus the control treatment (soil without mulching). The use of mulching of soil, P. glaucum and B. ruziziensis, proved to be a beneficial practice, reducing the soil temperature by up to 5ºC. There was a lower incidence of weeds with the use of the P. glaucum and A. strigosa coverages. The use of mulch did not provide a significant gain in productivity, however, there was a gain regarding the quality of the product, since the coverage with P. glaucum provided an increase in the size of the head (fresh mass of the commercial head).

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Castor bean cake in top-dressing application as a source of nitrogen on the production and quality of zucchini organic seeds

Bioscience Journal ◽

10.14393/bj-v36n0a2020-53563 ◽

2020 ◽

Vol 36 ◽

Author(s):

Natália de Brito Lima Lanna ◽

Estefânia Martins Bardiviesso ◽

Ana Emília Barbosa Tavares ◽

Priscilla Nátaly de Lima Silva ◽

Pâmela Gomes Nakada-Freitas ◽

...

Keyword(s):

Castor Bean ◽

Seed Quality ◽

Block Design ◽

The Other ◽

Control Treatment ◽

Macronutrient Content ◽

Randomized Block Design ◽

Fruit Mass ◽

Number Of Seeds

Studies in vegetables show that fertilization influences seed production positively, however, when the quality of the seeds is analyzed, the results are mostly inconsistent. The objective of this study was to evaluate the effect of castor bean cake (CBC) dose splitting in top-dressing application on the production and quality of zucchini organic seeds, as well as its effect on the macronutrient content of fruits and seeds. The experimental design was a randomized block design and four replications. There were 13 treatments with four doses of CBC in top-dressing (1.7, 3.4, 5.1 and 6.8 t ha-1) per three applications (33.3-33.3-33.3%, 50-50% and 33-50-17%) and the control treatment without any kind of top-dressing fertilization. The study evaluated the number of ripe fruits per plant, the production (number and mass) of seeds per fruit and per plant, the mass of one hundred seeds, seed germination, first germination count, and macronutrient content in the diagnosis leaf, in mature fruits (without seeds) and seeds. The number of ripe fruits per plant was not affected by the CBC doses in top-dressing, neither by the splitting of the applications. It was observed that the number of seeds per fruit, mass of seeds per fruit and mass of seeds per plant showed quadratic behavior. Regarding seed quality, only the 1.7; 3.4 and 5.1 t ha-1 doses produced seed with superior quality than the other doses. In conclusion, the CBC doses increased the number of seeds per fruit, mass of seeds per fruit and per plant up to the 4.5t ha-1 dose, approximately.

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Yield and physiological quality of wheat seeds produced under different irrigation depths and leaf Silicon

Semina Ciências Agrárias ◽

10.5433/1679-0359.2021v42n4p2233 ◽

2021 ◽

Vol 42 (4) ◽

pp. 2233-2252

Author(s):

Guilherme Fontes Valory Gama ◽

◽

Rafael Macedo de Oliveira ◽

Daniel Teixeira Pinheiro ◽

Laércio Junio da Silva ◽

...

Keyword(s):

Electrical Conductivity ◽

Soil Moisture ◽

Water Balance ◽

Seed Weight ◽

Block Design ◽

Accelerated Aging ◽

Physiological Quality ◽

Thousand Seed Weight ◽

Wheat Seeds

Water availability is one of the main factors responsible for wheat productivity, as well as the quality of the produced seeds. Silicon (Si) has an important role in mitigating the effects of various biotic and abiotic stresses. Thus, Si application can be used to mitigate the effects of different irrigation depths on the production and quality of wheat seeds. The work aimed to evaluate the yield and physiological quality of wheat seeds produced from plants fertilized with leaf Si and grown under different irrigation depths. The experiment was laid out in a split-plot randomized block design, with four replications. The plots consisted of three irrigation depths (0, 50, and 100% of the total irrigation requirement [TIR]). In the subplots, Si treatments were allocated (without application [0 mM] and 5 mM SiO2, applied at the tillering stage). The following parameters were evaluated: water balance of the system; soil moisture; yield; thousand seed weight; germination; electrical conductivity; accelerated aging; seedling length and emergence. The water balance of the system was negative for the 0% TIN irrigation depth after anthesis and there was less soil moisture in this depth. There was no effect of irrigation depths and Si application on plant yield. The smaller irrigation depths imposed reduced the thousand seed weight and the electrical conductivity of the seeds produced. Plants fertilized with Si did not differ in germination, but they produced more vigorous seedlings with greater growth and uniformity.

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