Biostimulators role in sunflower seedling development

usab-tm.ro

The carrying out of uniform forage crops represents an important technological loop for all agricultural species. The uniformity of these crops is caused especially by seed germination capacity, respectively by plant emergence capacity, depending upon the climatic and technological conditions. With regards to the researches carried out in this direction. We present here the influence exerted by some biologically-active products, used through extra-root application during plant vegetation period, upon seeds submitted to germination. The observations performed on alfalfa seeds have led to the conclusion that the per cent of germinated seeds ranges from 95.66%. In the untreated control variant, to 99.33% in the variant treated with the product Stimupro and Mega grow.

Journal of Agriculture and Ecology Research International, 2019

The corn crop has been cultivated throughout the country, with increasing productivity with the help of technology products. There are greater demand and greater use of improved seeds, associated with treatments of fungicides, insecticides, and bioregulators. It is believed that the use of biostimulant can improve many plant characteristics, one of which is productivity. The present work had as objective to evaluate the effect of the use of biostimulant applied in the treatment of seeds on the germinability and initial development of corn plants. The biostimulants used in the experiment were the Haf-Plus ® from the Inesta group, which is an organomineral stimulant and Stimulate ® from Stoller do Brazil which is a hormonal bio stimulant. The experimental design was completely randomized, in a 2 x 4 factorial scheme, with two biostimulants (Stimulate ® and Haf Plus ®) in 4 doses (Stimulate: control, 0.5 mL of Stimulate + 1 mL of water, 1.0 mL of Stimulate + 0.5 mL of water, 1.5 mL of Stimulate, and for Haf Plus: control, 0.125 mL + 0.375 mL of distilled Original Research Article

Acta horticulturae, 2019

Aster novi-belgii is a perennial hemicriptophytes species, commonly grown in the gardens of Romanian villages. It is a plant valued for its hardiness and vigor, especially for colour and abundance of flowering that occurs in early autumn. This paper aims to analyse the influence of different treatments on seed germination regarding the growth and development of Aster novi-belgii seedlings. The experiment was conducted in two stages, depending on the state in which the treatments were applied (seeds, respectively seedlings). The first set of experiments (seed germination) was made in four variants in which a control variant (V1) with non-treated seed and three variants which had immersed seeds in different solutions: distilled water (V2); BlackJak solution 5 mL L-1 (V3), Sprintene solution 1 mL L-1 (V4). Treatments carried out favoured germination and plant emergence and positively influenced the germination percentage (V1 and V4-32%, V2-28%, V3-48%), duration and speed of emergence. The best results were obtained by seed soaking in BlackJak 5 mL L-1 solution for 1.5 h. In the second stage of the experiment the obtained seedlings were used, which were picked out after approximately 45 days from sowing, and treatments were applied with the same products used to seeds (BlackJak and Sprintene), resulting in three variants: untreated seedlings (V5) seedlings treated with BlackJak 5 mL L-1 (V6) and seedlings treated with Sprintene 1 mL L-1 (V7). At this stage observations were made on stem height, number of leaves and number of internodes, the best results being recorded for Sprintene treated seedlings.

Revista de Agricultura Neotropical, 2022

Carrot is a vegetable with an important socioeconomic role, both due to the employment of labor and high commercialization. To optimize the establishment of this crop in fields, seeds with rapid and uniform germination are essential. Therefore, various seed treatment techniques have been used to enable and enhance the germination percentage and optimize the vigor of the seeds. In continuation with this, the objective of this study was to evaluate the effects of thiamethoxam on the physiological performance of carrot seeds during germination and initial development of seedlings. The experimental design was a completely randomized design in a 5 × 4 factorial scheme, with five carrot cultivars and four doses of thiamethoxam (0, 0.4, 0.8, and 1.2 mL). Parameters such as germination, first germination count, seedling length, and dry mass were evaluated. In addition, biochemical analyses of total sugars, total amino acids, and proline content were performed. In general, the treatment of carrot seeds with thiamethoxam positively influenced the germination of the seeds of the cultivars studied. However, thiamethoxam doses of 0.4 and 0.8 mL had no positive effect on the seedling development of the Tropical cultivar. The thiamethoxam dose of 1.2 mL was beneficial to the development of seedlings and accumulation of metabolites in the Alvorada cultivar.

2010

Germination energy is reliable index for evaluation of seed resistance to adverse environment conditions. Seed has better quality if there is no difference between germination energy and germination. With the germination energy increase, at the same level of germination, the yield is increased as well. Type of substratum is one of the factors that have influence on germination energy, because the percentage of germinated seed is increasing with increasing of absorption capacity of substratum. The research was conducted in Laboratory for seed testing and in greenhouse of Oil Crop Department, Institute of Field and Vegetable Crops Novi Sad. Seed of sunflower hybrid NS-H-111 was treated with fungicides: benomil, metalaxyl and fludioxonil and insecticides: tiametoxam and imidacloprid. Control variant was seed without chemical treatment. The next combinations were investigated: control (nontreated seed), fludioxonil + metalaxyl (F+M), fludioxonil + metalaxyl + tiametoxam (F+M+T) and fludioxonil + metalaxyl + imidacloprid (F+M+I). Seed was treated before sowing and first determination of germination energy was done after few days. For examination of influence of storage period length on seed quality, seed was kept in storage facility. Conditions in the storage were depending on environmental conditions. Sterilized sand and soil were used as substratum and germination energy was determined on the 4th day after sowing. The aim of this research was to examine influence of storage period length and type of substratum on germination energy. Based on results there are statistically high influence of chemical treatment, length of storage and type of substratum on seed germination energy. Double interaction chemical treatment x length of storage and length of storage x substratum type, were highly significant, while the interaction chemical treatment x substratum wasn't significant. Difference between germination energy of control and treatment F+M was highly significant compared with germination energy of seed treated with insecticides. The value of this parameter of B+M treatment was significantly higher compared with treatment F+M+T (for 1.70%), and highly significant different compared with F+M+I treatment (for 2.52%). Germination energy after six and nine month keeping was highly significantly different compared with other variants. The values of investigated parameters after twelve months was significantly lower than values measured at the beginning of research and after three months. Seed germination in soil was significantly higher then in the sand for 2.62%.

2012

The study was conducted in Hortiviticol Systems Bioengineering Department, University of Agronomic Sciences and Veterinary Medicine Bucharest. The purpose of this study was to test the product BioSeed 3 + and to recommended the best concentration for shortening and economic pepper seed germination. Research results have shown that the wetting of pepper seeds for 60 minutes before sowing in solutions of different concentrations BioSeed 3+ resulted in a shorter period of germination. The forming and growth rhythm of the roots was accelerated for all treated variants. This is a relevant aspect as the development of a vigorous radicular system leads to obtaining an appropriate sapling. Germination time for all treated variants of the pepper seeds was shortened which helps obtain quality seedlings earlier. Keeping in mind the species specific requirements regarding the germination temperature and timeframe, this provides an advantage as it saves on the energy required for heating the env...

European Journal of Horticultural Science, 2023

Production of crops is troubled by major issues called abiotic stressors. The most important sensitive stages to abiotic stress are during seed germination and seedling growth. Seed priming promotes faster, more synchronised emergence and enhances the performance of seedlings. Different kinds of chemicals are utilised for seed priming today. At the same time the issue of environmental concerns is coming from every corner. Hence organic farming is getting due considerations. The present study was aimed to investigate the effect of matrix priming with biostimulants on germination and seedling quality of carrot seeds under abiotic stress conditions. The experiment was conducted at the Seed Science and Technology Laboratory of Ankara University under controlled conditions. Moisture stress was simulated using PEG-6000 at different concentrations (0, 10 and 15% PEG), while salinity stress was simulated using NaCl at different molarity (0, 50 and 100 mM), which have same osmotic potential with the corresponding PEG concentrations. All matrix priming treatment performance of seeds and seedlings. Seaweed alone and its combination with butenolide showed the best performance for all the parameters. The GP of nonprimed low-quality seeds of carrot at-0.30 MPa was 0% but it was 32% for seeds primed with SW. Likewise, for low quality seeds at 100 mM salt concentration, maximum seedling height of 4.7 cm was recorded in SW while the control was 0 cm. Biostimulants can be used as organic seed priming agent to enhance seed quality.

Journal of Applied Life Sciences and Environment

Wheat is an important cereal around the world and is a nutrient source in people’s diets. In this work, we focused on the potential of some biostimulators on four wheat varieties - Dropia, Glosa, Gruia, and Pegasus, with a focus on the effects during the first developing stages from germination to the appearance of the second leaf. Our results indicated that germination and some biochemical traits can be strongly influenced by biostimulants, with the effects also depending on the genetic background of the variety. Some treatments proved beneficial for germination, and also growth as found by the biometric measurements, while others inhibited both traits. Some of the biostimulants increased the concentration of the photosynthetic compounds, thus being recommended for use during all stages of wheat development. Dropia, Glosa, and Gruia reacted positively in most tests, their germination and plant and root development were stimulated by Super fifty, Atonik, Asfac, and Cropmax. Thus, we...

Journal of Horticultural Research

Due to the common trend towards limitation of excessive use of chemicals in agriculture, there is a growth of interest in methods of seed quality improvement that would be safe for the environment. These include methods based on the effect of various physical factors, such as laser light, magnetic field, seed treatment with magnetized water, electric field. The work provides detailed information on the impact of seed stimulation of these factors on germination, growth, development and yielding of horticultural plants. Summarizing the results of the study, it can be concluded that the application of physical factors in appropriate doses can be an effective way to enhance many plant parameters that increase their productivity. The beneficial effects of seed stimulation are mainly related to the first stages of plant life, i.e. – germination, emergence and growth of seedlings. In many cases, the enhancement of these features is also the result of the increase of plant yields. The incre...

For determination of sunflower seed quality several substrates are in use: sand, soil, compost and filter paper where sand is most commonly used. Sand enables good contact of seeds and substrate and decreases possibility of contamination with pathogens. In addition, sand could be reused after sterilisation while other substrates are recommended for one use, which makes them more costly. For that reason, soil, compost and filter paper are not so frequently used. They find their place in research and comparative studies. o Aim of this research was to determine if there is interaction between type of substrate and seed germination especially in case of seed protected with pesticides and stored in storage facilities. o Research was conducted using hybrids NS-H-111 and Sremac, created in Institute of Field and Vegetable Crops. Seed germination was determined in laboratory conditions using standardized test, on hundred seed sample in four replications and temperature of 25ºC and relative humidity of 95% with ten-day incubation period. Seed was germinated in sand, compost and filter paper. Study was done on seed treated with products containing metalaxyl, fludioxonyl, thiametoxam and imidacloprid as active ingredient, nine months before research started. Untreated seed was used as a control. Experimental design of trial was three-factorial completely randomized design and results were compared using analysis of variance. o Influence of substratum, chemical treatment and lenght of storage on germination of hybrids NS-H-111 and Sremac was statistically highly significant. Interactions seedling substratum x length of storage and chemical treatment x length of storage was highly significant for both hybrids while, while difference for the interaction seedling substratum x chemical treatment was significant only for hybrid NS-H-111. o Importance of this research is in broadening knowledge of interactions of different factors influencing seed vitality during storage as well as study the efficiency in using different modification of germination test in order to get reliable results.