Abiotic factors in the effect of herbicides on the physiological quality of rice seeds

The objective of this study was to assess physiological quality of seeds and the initial growth of lowland rice seedlings, cv. PUITA INTA-CL, treated with a product based on Zinc, Boron and Molybdenum. The following dosages of product were used: 0 (control), 50, 100, 150 and 200 mL.100 kg-1 seed. A completely randomized experimental design was used, with 10 treatments and four replications. Physiological quality of seeds was assessed by following tests: germination; first count of germination; and length and dry phytomass of seedlings. The initial growth was assessed at 7, 14, 21, 35, and 42 days after emergence (DAE) through plant height, leaf area and dry phytomass of aerial parts and roots. It was concluded that the treatment of rice seeds with the product containing Zinc, Boron and Molybdenum up to the dosage tested of 200 mL.100 kg-1 seed does not influence germination, first count of germination, and the dry phytomass of aerial parts and roots; however, negatively influences seedling length. In addition, it also promotes greater plant height, higher leaf area, higher production of dry phytomass of seedlings, and increase on the growth rate, until 42 DAE.

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Treatment of rice seeds with salicylic acid: seed physiological quality and yield

Journal of Seed Science ◽

10.1590/2317-1545v36n3636 ◽

2014 ◽

Vol 36 (3) ◽

pp. 352-356 ◽

Cited By ~ 8

Author(s):

Lizandro Ciciliano Tavares ◽

Cassyo Araújo Rufino ◽

Sandro de Oliveira ◽

André Pich Brunes ◽

Francisco Amaral Villela

Keyword(s):

Salicylic Acid ◽

Seed Yield ◽

Seed Treatment ◽

Seed Quality ◽

Rice Seed ◽

Promising Alternative ◽

Seed Industry ◽

Physiological Quality ◽

Rice Seeds

Seed treatment with growth regulators, especially salicylic acid, is a promising alternative to the seed industry because it is an important inducer of resistance to diseases and pests, as well as acting significantly on quality and seed yield. The objective of this study was to evaluate the performance of rice seed treated with different concentrations of salicylic acid, as well as assess the crop yield and seed quality. The treatments consisted of increasing levels of 0, 50, 100, 150 and 200 mg.L-1 salicylic acid. To this was prepared a stock solution of salicylic acid and the highest concentration by successive dilution in distilled water, the other concentrations were obtained. The physiological quality of seeds produced was treated and evaluated by tests of vigor and germination, and after harvest were evaluated seed yield. It follows that treatment of rice seeds with salicylic acid concentrations up to 130 mg.L-1 at a dose of 2 mL.kg-1 seed does not affect the germination and affects the strength, however provides substantial increases in the yield of seeds. The seed treatment with salicylic acid has no influence on seed quality produced.

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Physical and physiological quality of rice seeds in function of drying temperature and storage

Revista CERES ◽

10.1590/0034-737x202168010004 ◽

2021 ◽

Vol 68 (1) ◽

pp. 31-38

Author(s):

Maurício Albertoni Scariot ◽

Gustavo Campos Soares ◽

Lauri Lourenço Radünz ◽

Rafael Gomes Dionello

Keyword(s):

Drying Temperature ◽

Physiological Quality ◽

Rice Seeds ◽

And Storage

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TEST OF EXUDATE pH IN RICE SEEDS

Revista Caatinga ◽

10.1590/1983-21252019v32n412rc ◽

2019 ◽

Vol 32 (4) ◽

pp. 960-965

Author(s):

MARIELY DE ABREU DOS SANTOS ◽

IZABELA CRISTINA DE OLIVEIRA ◽

GRAZIELY ALVES NOGUEIRA ◽

JOSUÉ BISPO DA SILVA ◽

ANA CARINA DA SILVA CANDIDO ◽

...

Keyword(s):

Experimental Design ◽

Water Content ◽

Promising Method ◽

Distilled Water ◽

Rice Seed ◽

Physiological Quality ◽

Rice Seeds

ABSTRACT The objective of this study was to evaluate the efficiency of a pH test of the exudate (with and without tegument) as an indicator of the physiological quality of rice seeds. The experimental design was completely randomized, with seven lots and four replications. The seven lots were assessed for water content and initial physiological quality by means of germination, first germination count, emergence, emergence speed index and tetrazolium tests. The pH test of the exudate was conducted with 100 seeds of each treatment, with tegument and without tegument. The seeds were individually soaked in 2.0 mL distilled water for different periods (20, 40, and 60 minutes) and three temperatures (20, 25, and 30 °C). The results were submitted to the Scott Knott test at 5% probability. The pH test of the exudate is a promising method to evaluate the physiological quality of rice seeds by detecting differences in vigor between marketable lots. This test should be conducted with rice seed without tegument, at 25 °C, with a soak time of 60 minutes.

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Combined Effects of Biological and Chemical Treatment on Rice Seed Physiological and Sanitary Quality

Journal of Agricultural Science ◽

10.5539/jas.v11n15p106 ◽

2019 ◽

Vol 11 (15) ◽

pp. 106

Author(s):

Alana Emanoele Pereira ◽

Weliton Lucas da Silva Benites ◽

Luana de Carvalho Catelan ◽

Ana Paula Silva ◽

Nadia Graciele Krohn

Keyword(s):

Seed Quality ◽

Dry Weight ◽

Seed Vigor ◽

Rice Seed ◽

Water Control ◽

Randomized Design ◽

Seed Health ◽

Physiological Quality ◽

Rice Seeds

This study aimed to evaluate the efficiency of integrated biological and chemical control of pathogens in rice seeds and their effects on seed quality. The experiment was conducted in a 2 × 5 factorial completely randomized design. Fungicide-treated (carboxin/thiram) and untreated rice seeds were inoculated with distilled water (control), Azospirillum brasilense, Bacillus subtilis, Pseudomonas fluorescens, or Trichoderma harzianum. Seed vigor and viability, shoot and root length, and seedling dry weight were determined. The blotter test was carried out to assess seed health. Fungicide treatment improved seed vigor and viability and reduced the incidence of fungi. Biological treatment did not enhance the physiological quality of seeds but was able to control fungi. A. brasilense, B. subtilis, P. fluorescens, and T. harzianum controlled Phoma sorghina; B. subtilis, P. fluorescens, and T. harzianum were effective against Aspergillus flavus; P. fluorescens and T. harzianum controlled Pyricularia oryzae; and T. harzianum was effective against Gerlachia oryzae.

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Physiological Quality of Rice and Soybean Seeds Produced Under Hydric Stress in Greenhouse

Journal of Agricultural Science ◽

10.5539/jas.v11n12p22 ◽

2019 ◽

Vol 11 (12) ◽

pp. 22

Author(s):

Ruddy A. V. Escalera ◽

João R. Pimentel ◽

Cristian Troyjack ◽

Ivan R. Carvalho ◽

Vinícius J. Szareski ◽

...

Keyword(s):

Growth And Development ◽

Soybean Seeds ◽

Phenological Stage ◽

Yield And Quality ◽

Physiological Quality ◽

Hydric Stress ◽

Growing Environment ◽

Rice Seeds

The hydric resources are primordial for plants growth and development, under conditions where the growing environment express hydric shortage. These conditions can directly or indirectly affect development, the formation of new organs, yield and quality seeds. The study aimed to evaluate the physiological quality of rice and soybean seeds, produced under hydric restriction. Experiment 1: for rice, the scheme was completely randomized with four repetitions, the treats of hydric restrictions were applied in the periods of 0, 24, 48, 72 hours at the phenological stage of filling seeds. Experiment 2: for soybean, the scheme was completely randomized, conducted in factorial scheme, four replicates with four hydric restriction periods of 0, 24, 48 and 72 hours, at the phenological stage of filling seeds. It was verified that as the hydric restriction hours increase, at the rice seeds filling, the physiologic quality is affected, the higher effect occurred at 72 hours of restriction. While at the soybean seeds production it was not verified such effects, only the thousand seeds mass was negatively affected. The physiological quality of rice seeds were more affected, when compared to soybean seeds submitted to the same treats of hydric stress.

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Seed coating with biological agents to improve the quality of rice seeds contaminated with blast pathogens and increase seedling growth

Biodiversitas Journal of Biological Diversity ◽

10.13057/biodiv/d210234 ◽

2020 ◽

Vol 21 (2) ◽

Author(s):

TANTRI PALUPI ◽

FADJAR RIYANTO

Keyword(s):

Seedling Growth ◽

Positive Control ◽

Negative Control ◽

Biological Agents ◽

Blast Disease ◽

Good Growth ◽

Seed Coating ◽

Physiological Quality ◽

Rice Seeds

Abstract. Palupi T, Riyanto F. 2020. Seed coating with biological agents to improve the quality of rice seeds contaminated with blast pathogens and increase seedling growth. Biodiversitas 21: 683-688. The aim of this research were (1) to evaluate the compatibility of five biological agents (SP21, SP31, RP21, TP12, and TP11), (2) to evaluate the physical and physiological quality of rice seeds contaminated with Pyricularia grisea after being treated with seed coating enriched with biological agents, (3) to evaluate the effectiveness of seed coating on the incidence of blast disease and seedling growth. The first experiment tested the compatibility of five bacterial antagonists on the PSA plates. There were eight treatments in the second experiment namely seed coating enriched with SP21+SP31; SP21+RP21; SP21+TP12; SP31+RP21; RP21+TP11; fungicides; positive control (rice seeds contaminated with blast), and negative control (healthy seeds), and seven treatments in the third experiment which were the same as in experiment 2 without negative control. Parameters observed in the second experiment were: seed germination, vigor index, and growth rate, while parameters observed in the 3rd experiment were the incidence rate of blast disease and plant height. The results of experiment 1 showed that isolates SP21+SP3, SP21+RP21, SP21+TP12, SP31+RP21, and RP21+TP11 had good growth compatibility without antagonism, and they can be used as biocontrol agents. Results of experiment 2 showed that seed coating enriched with SP21+SP31 isolates has the potential to improve the physical and physiological quality of the seeds. Results of experiment 3 showed that seed coating enriched with RP21+TP11 had no incidence of blast disease up to 4 weeks after planting.

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Prior disinfestation of irrigated rice seeds under laboratory conditions favors expression of physiological potential

Revista de Ciências Agroveterinárias ◽

10.5965/223811711942020494 ◽

2020 ◽

Vol 19 (4) ◽

pp. 494-497

Author(s):

Bruno Tabarelli Scheidt ◽

Jaquelini Garcia ◽

Ricardo Trezzi Casa ◽

Cileide Maria Medeiros Coelho ◽

Juliano Berghetti

Keyword(s):

Experimental Design ◽

State University ◽

Germination Test ◽

Irrigated Rice ◽

Seed Analysis ◽

Randomized Experimental Design ◽

Physiological Quality ◽

Analysis Laboratory ◽

Rice Seeds

The purpose of this study was to analyze prior seed disinfestation of irrigated rice seeds with sodium hypochlorite and its effect on physiological quality. The experiment was conducted in the seed analysis laboratory of Santa Catarina State University (UDESC). Twenty-four (four per cultivar) seed lots of the cultivars SCSBRS Tio Taka, Epagri 109, SCS116 Satoru, SCS118 Marquês, SCS121 CL, and SCS122 Miura, produced in the Upper Itajaí Valley in the 2016/2017 season, were used in a completely randomized experimental design with four replications. Germination and vigor tests were performed with and without disinfestation seeds. For the germination test with disinfected seeds, there was a higher percentage of normal seedlings and a smaller number of abnormal seedlings and dead seeds. There was significant decrease in vigor without prior seed disinfestation. The fungi that infested the seeds caused an increase in the percentage of abnormal seedlings and dead seeds. Seed disinfestation prior to physiological test positively affects the results regarding the physiological quality of irrigated rice seeds.

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Rice Seed Production Under Conditions of Salinity Stres

Ciência Rural ◽

10.1590/0103-8478cr20170057 ◽

2018 ◽

Vol 48 (9) ◽

Author(s):

Fabio Schaun Harter ◽

Leticia dos Santos Holbig Harter ◽

Geri Eduardo Meneghello

Keyword(s):

Seed Production ◽

Salinity Stress ◽

Irrigation Water ◽

Saline Stress ◽

Rice Seed ◽

Rice Cultivars ◽

Physiological Quality ◽

Crop Cycle ◽

Rice Seeds

ABSTRACT: In the present study, the objective was to evaluate the production and quality of rice seeds of four cultivars under conditions of saline stress caused by irrigation water. The work was carried out at the EliseuMaciel Agronomy College of the Universidade Federal de Pelotas, with four rice cultivars, IRGA 417, Avaxi CL, Inov CL and IAS 12-9 (Formosa). In the experiment, the following saline concentrations were used: 0; 12.5; 25; 37.5; 50; 75 and 100mM. After completing the crop cycle, the following agronomic characteristics were evaluated in each of the plants: number of panicles, total weight of panicles, percentage of full seeds, percentage of seedlings and weight of a thousand seeds. The physiological quality of the seeds harvested from the plants maintained under conditions of salinity stress was evaluated by germination and first count tests. Saline stress reduced the productivity and physiological quality of rice seeds, with different responses from the four cultivars used.

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Rice seeds yield and quality according to fertilization

Comunicata Scientiae ◽

10.14295/cs.v8i1.1532 ◽

2017 ◽

Vol 8 (1) ◽

pp. 126

Author(s):

Edivado Sousa Santana ◽

Lisandro Da Luz Ramos ◽

Hudson Da Costa Feitoza ◽

Fabio Mielezrski ◽

João Carlos Medeiros

Keyword(s):

Seed Quality ◽

Upland Rice ◽

Block Design ◽

Foliar Fertilization ◽

Yield And Quality ◽

Randomized Block Design ◽

Physiological Quality ◽

Macro And Micronutrients ◽

Rice Seeds

To obtain high seed quality, good fertilization practices are essential due to its influence not only on seed yield and weight, but also controlling the development of seedlings anomalies. Therefore, the aim of this study was to evaluate the effects of different forms of fertilization on yield and physiological quality of upland rice seeds. It was used nitrogen fertilization in coverage as urea and foliar fertilization with macro and micronutrients. The treatments consist of various sources and forms of fertilization, in a randomized block design, as follows: covering at tillering with N at 34 kg ha-1; covering at floral primordium with N at 34 kg ha-1; foliar fertilization at tillering; foliar fertilization in floral primordium; covering with N at 34 kg ha-1 in tillering and foliar fertilization in floral primordium; only basic fertilization and treatment without fertilization. The results showed that the application of nitrogen fertilizer with urea, at tillering and floral primordium at 34 kg ha-1 of N increased the production of rice seeds. In addition, coverage with urea and foliar fertilization containing macro and micronutrients increased rice seeds yield and physiological quality.

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