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

2014 ◽  
Vol 36 (3) ◽  
pp. 352-356 ◽  
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.

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

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.

Effect of foliar application of growth activator, promoterand antioxidant on seed quality of soybean

2016 ◽  
Author(s):  
P . Kuchlan ◽  
M. K. Kuchlan ◽  
S. M. Husain
Keyword(s):  
Salicylic Acid ◽  
Seed Yield ◽  
Seed Quality ◽  
Foliar Application ◽  
Foliar Spray ◽  
Soybean Seed ◽  
Seed Vigour ◽  
Filling Stage ◽  
Seed Health

Loss of seed quality in soybean is a serious problem in tropical and subtropical region. Foliar application of salicylic acid (SA), GA3 and acetyl salicylic acid (50 ppm) at seedling and pod filling stage, K2HPO4 (2%), a-tocopherol (100 ppm) at flowering and pod filling stage was done on soybean varieties – NRC 7 and JS 335. Foliar application of SA showed positive effect on seed yield, seed health, germination and seed vigour during storage. Plant height was significantly improved by the GA3 spray in both the varieties. Significantly higher seed yield was obtained with foliar spray of a-tocopherol. Application of SA was found effective to protect plants from various diseases to get quality seed. a-Tocopherol and K2HPO4 treatment significantly reduced MDA production in seeds. a-Tocopherol application increased super oxide dismutase activity as a result the lipid peroxidation of seed during storage was significantly reduced. Application of a-tocopherol, K2HPO4 and salicylic acid improved the storage or keeping quality of soybean seed.

Producción de semilla de tomate de cáscara en hidroponía

2019 ◽  
pp. 19-24
Author(s):  
Eduardo Rodríguez-Guzmán ◽  
Luis Javier Arellano-Rodríguez ◽  
Alicia De Luna-Vega ◽  
Cruz Arriaga-Ruiz
Keyword(s):  
Volcanic Rock ◽  
Seed Production ◽  
Nutrient Solution ◽  
Seed Yield ◽  
Seed Quality ◽  
Productive Capacity ◽  
Physiological Quality ◽  
Polyethylene Bags ◽  
Husk Tomato

Fruit and seed productive capacity and physiological seed quality of 2 varieties of husk tomato were estimated: Jojutla and CHF1. The study was conducted in hydroponics under greenhouse, in the CUCBA-UDG, Zapopan, Jalisco. Red volcanic rock (/Tezontle) of 0.5 to 2 cm in diameter was used in 19 L polyethylene bags and Steiner's universal nutrient solution of 0.3 to 0.7 atm, depending on the stage of the plant. The production of fruit and seed and the physiological quality of the seed were estimated. The varieties Jojutla and CHF1 showed a similar behavior in the production of fruit and seed, with lower fruit yields than expected (30 ton / ha in the field) because only 3 harvests were made, looking to produce husk tomato in winter when it reaches attractive prices. The weight of the fruit was greater as cuts were made while the seed production improved by cutting, associated with a greater number of fruits, while the weight of the fruit was not related to the seed yield. The physiological quality of the seed was affected by cutting the fruit to commercial maturity even when it was left to mature in the shade.

scholarly journals Viability and Dormancy of Rice Seeds after Storage and Pre-Treatment with Dry Heat and Chemical Agents

2017 ◽  
Vol 9 (7) ◽  
pp. 175 ◽  
Author(s):  
Yvonne A. Mutinda ◽  
James W. Muthomi ◽  
John M. Kimani ◽  
George N. Cheminigw’wa ◽  
Florence M. Olubayo
Keyword(s):  
Gibberellic Acid ◽  
Seed Dormancy ◽  
Seed Treatment ◽  
Room Temperature ◽  
Seed Quality ◽  
Packaging Material ◽  
Rice Seed ◽  
Dry Heat ◽  
Rice Seeds ◽  
Pre Treatment

Inappropriate seed packaging and seed dormancy affects seed quality and consequently leads to reduced crop stand, low seedling vigour and reduced yields. The objective of the study was to determine the effect of seed packaging material and seed treatment on viability and dormancy in rice seeds. Effect of packaging material was evaluated by storing freshly harvested seeds of Basmati 370 and BW 196 varieties in polythene, khaki, cheese cloth, polypropylene (Pp) sack and gunny bag sat room temperature and at 6 oC for six months. Effect of seed treatment on dormancy was determined by pre-treatment of seeds with nitric acid at 0.1 M, 0.2 M, 0.5 M, 1 M and 2 M, gibberellic acid (GA3) at 1000 ppm, 2000 ppm and 5000 ppm, and hydrogen peroxide at 0.5 M, 1 M, 2 M, 3 M, 5 M and dry heat at 50 oC for 48 hours. The seeds were subjected to germination test on moist paper and data on percentage germination, seedling length and seedling dry weight were taken. Packaging material had a significant (P ≤ 0.05) effect on germination and vigour. At room temperature, seed stored in polythene bag had the highest germination 88.2% and 57.8% for BW 196 and Basmati 370, respectively. Basmati 370 in khaki bag stored in the cold room had the highest germination 48.3%, while BW 196 stored in polythene had the highest (86.0%). Pre-treatment of seeds reduced dormancy, with variety BW 196 showing the highest germination of up to 67%, while variety Basmati 370 had the lowest germination of up to 40%. Gibberellic acid (GA3) at 5000 ppm was the most effective in breaking seed dormancy resulting in up to 95.7% germination. The results of the study indicated that packaging rice seed in polythene bags for periods not exceeding six months and pre-treatment with GA3 maintains high seed viability and breaks dormancy, respectively, thus ensuring rapid and uniform germination of vigorous seedlings. This would reduce the period farmers have to wait after harvest before they can plant newly harvested rice seeds.

scholarly journals Nitrogen management of forage grasses for nutrition, seed production, and nutrients in residual straw

2019 ◽  
Vol 54 ◽  
Author(s):  
Tiago Aranda Catuchi ◽  
Rogério Peres Soratto ◽  
Amarildo Francisquini Júnior ◽  
Fernando Vieira Costa Guidorizzi ◽  
Carlos Sérgio Tiritan
Keyword(s):  
Seed Yield ◽  
Field Experiments ◽  
Seed Quality ◽  
Flag Leaf ◽  
Forage Grasses ◽  
Tropical Forage ◽  
Physiological Quality ◽  
Use Efficiency ◽  
N Use

Abstract: The objective of this work was to evaluate the nutrition, accumulation of nutrients in residual straw, pure seed yield, and seed quality of the tropical forage grasses 'Mombaça' and 'Xaraés' subjected to topdressing with nitrogen fertilizer management. Field experiments were carried out in the municipalities of Rancharia and Presidente Prudente, in the state of São Paulo, Brazil. The treatments included a control (without N topdressing) and four N fractionation forms at different forage stages: 150 kg ha-1 N, at the vegetative phase (VP); 150 kg ha-1 N, at the beginning of the reproductive phase (RP), between panicle initiation and the prebooting stages; 100 kg ha-1 N, at VP plus 50 kg ha-1 N at RP; and 50 kg ha-1 N at VP plus 100 kg ha-1 N at RP. Fertilization with N as topdressing, regardless of the N fractionation form, increased N concentration in the flag leaf and in residual straw, and the quantities of N accumulated by 'Mombaça' and 'Xaraés' forage grasses. The application of all or most N in the VP increased the quantities of residual straw and of P and K accumulated by the 'Mombaça' forage grasses. The application of all or most N in the RP provided a greater pure seed yield and N use efficiency in both forage grasses. The seed physiological quality of the forages is not affected by fertilization with N topdressing.

scholarly journals Yield and Physical and Physiological Quality of Salvia hispanica L. Seeds Grown at Different Sowing Dates

2018 ◽  
Vol 10 (8) ◽  
pp. 182 ◽  
Author(s):  
Patrícia Carine Hüller Goergen ◽  
Ubirajara Russi Nunes ◽  
Raquel Stefanello ◽  
Isabel Lago ◽  
Anderson Rodrigues Nunes ◽  
...  
Keyword(s):  
Seed Yield ◽  
Seed Quality ◽  
Sowing Date ◽  
Main Stem ◽  
Salvia Hispanica ◽  
Sowing Dates ◽  
Physiological Quality ◽  
Salvia Hispanica L ◽  
Physiological Tests

Variations in the sowing date of chia (Salvia hispanica L.) reflect directly on the physiological potential of the produced seeds. This study aimed to analyze the yield and the physical and physiological quality of seeds from the main stem and branches of Salvia hispanica plants grown at different sowing dates. A field experiment was conducted in the crop year of 2016/2017 in five sowing dates (16/09/22, 16/10/28, 17/01/03, 17/02/08 and 17/03/24) in a randomized complete block design with four replicates. Harvest at each sowing date was done when 80% of the leaves of each plant exhibited a darker color, indicating that they were dry. Seed yield was determined in each plant compartment (main stem and branches) and final ear length (cm) and diameter (cm) were also measured at all sowing dates. The following physical and physiological tests were performed to determine seed quality: water content, mass of one thousand seeds, germination test, first count germination, length (root and hypocotyl) and dry matter of the seedlings. Chia can be sown from September to February providing seed yield with high physical and physiological quality. The physical and physiological quality of the chia seeds does not differ between main stem and branches. In late sowing, there is the risk of frost occurrence what may impair the physiological quality and the yield of chia seeds. The best sowing month for obtaining higher yield of chia seeds in a south subtropical region is January.

scholarly journals TEST OF EXUDATE pH IN RICE SEEDS

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.

scholarly journals APLIKASI SISTEM INFERENSI FUZZY METODE TSUKAMOTO DALAM PENILAIAN MUTU BENIH PADI

2015 ◽  
Vol 7 (1) ◽  
pp. 19
Author(s):  
Diasta Risi Esa Annisa ◽  
Mutia Nur Estri
Keyword(s):  
Fuzzy Inference System ◽  
Seed Quality ◽  
Fuzzy Inference ◽  
Fuzzy Rules ◽  
Rice Seed ◽  
Output Variable ◽  
Inference System ◽  
Rice Seeds ◽  
Input Variables

In this paper, we use the Fuzzy inference system of Tsukamoto method to determine the rice seeds quality. The input variables are production average, the age of plant, and fallen seeds, and the output variable is rice seed quality. The output is determined through 4 steps i.e. fuzzification, determine fuzzy rules, and defuzzification. The results show that the best  quality of  rice seed is IR 64 and the worst is Lusi.

scholarly journals RICE SEED TREATMENT AND RECOATING WITH POLYMERS: PHYSIOLOGICAL QUALITY AND RETENTION OF CHEMICAL PRODUCTS

2017 ◽  
Vol 30 (4) ◽  
pp. 920-927 ◽  
Author(s):  
LOVANE KLEIN FAGUNDES ◽  
UBIRAJARA RUSSI NUNES ◽  
OSMAR DAMIAN PRESTES ◽  
TIÉLE STUKER FERNANDES ◽  
EDUARDO JOSÉ LUDWIG ◽  
...  
Keyword(s):  
Seed Treatment ◽  
Oryza Sativa L ◽  
Dry Mass ◽  
Rice Seed ◽  
Active Ingredients ◽  
Randomized Design ◽  
Phytosanitary Treatment ◽  
Physiological Quality ◽  
Chemical Products ◽  
Rice Seeds

ABSTRACT The use of chemical seed treatment is an important tool in the protection of seedlings and has contributed to the increase of rice yield (Oryza sativa L.). The objective of this study was to evaluate the physiological quality and quantify the retention of chemical products in rice seeds treated with insecticide and fungicide coated with polymers. Six seed treatments were used: control, phytosanitary treatment and phytosanitary treatment and coating with the polymers, Florite 1127®, GV5® Solid Resin, Polyseed CF® and VermDynaseed®. The physiological quality was evaluated by the test of germination and vigor by first count tests, germination speed index, shoot length, radicle length, seedling dry mass and sand emergence. To determine the retention of the active ingredients metalaxyl-M and thiamethoxam, an equipment called extractor was used. The experiment was organized in a completely randomized design (DIC) and the averages were separated by the Scott Knott test (p≤0.05). Seed treatment with the fungicide and insecticide, coated with the polymers, Florite 1127®, Solid Resin GV5®, Polyseed CF® and VermDynaseed®, did not affect the physiological quality of rice seeds. Solid Resin GV5®, Polyseed CF® and VermDynaseed® polymers were efficient at retaining thiamethoxam in the rice seeds, preventing some of the active ingredients of the insecticide from being leached through the sand columns immediately after the simulated pluvial precipitation.

scholarly journals Rice Seed Production Under Conditions of Salinity Stres

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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