Plant Growth Regulator Effects on Germination and Root Traits of ‘Lambada’ and ‘Don Victor’ Onion Cultivars

Macias-Leon, Maria A.; Leskovar, Daniel I.

doi:10.21273/hortsci12473-17

Cited by 4 publications

(1 citation statement)

References 30 publications

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“…In this work, the germination of the freshly collected seed does suggest that the collection period allowed to have mature seeds with mature embryos, as seen in Spurr et al [71]. Furthermore, the present ethylene application may have been too low to produce and affect the germination [72] Aging the seed at 15 • C in the dark for 17 months after harvest reduced the final germination by around 14%. Such a loss of germination highlights the ability of the seed lot from our experiment to maintain over time a good ability to germinate.…”

Section: Discussionmentioning

confidence: 48%

Ethylene and Chitosan Affected the Seed Yield Components of Onion Depending More on the Dose than Timing of Application

et al. 2022

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(1) Background: the production of onion seeds is limited by the competition between seeds and the vegetative organs and by scape lodging. However, information on the effects of plant growth regulation on onion seed production is scarce. Aim of the present study was to evaluate the seed yield components and germination ability of onion seeds as affected by the timing and dose of an ethylene application, a plant growth regulator able to modulate shoot–flower competition; and chitosan, an elicitor of plant defense mechanisms able to increase its tolerance to various stresses. (2) Methods: Onion was treated with ethylene at the recommended dose (100% RD) of a commercial product, at 150% RD in two contrasting phenological phases or untreated (control), or ‘with’ or ‘without’ chitosan, and the seed yield components and germination trend were measured. (3) Results: 100% RD at an early phase of growth did not influence the seed yield and increased the thousand seed weight (TSW) by 3.2%. The application of 150% RD decreased the seed yield by 33.5%, and this occurred irrespective of the timing of application. Such decreases were due to a reduction in the number of seeds per flower. The application of chitosan did not affect the crop at 100% RD and increased the seed yield and slightly increased, but not significantly, the TSW under 150% RD. Germination of the fresh seed was 92%, and 17 months of aging reduced it by 14%, with no effects of the treatments on the germination pattern. (4) Conclusions: the ethylene application mostly affected TSW but not the yield, whereas high doses of ethylene reduced yields irrespective of the timing of application. Such a result may have been due to a delay in the flowering onset that occurred in a relatively dry month. Chitosan sustained its yield when the yield potential was reduced by 150% RD, and such a result was likely due to physical protection from the transpiration since the synthetic fungicides applied did not likely allow the pathogens to infections. These results have implications for establishing the timing and dose of application of plant growth regulators and elicitors in seed onions to sustain the seed quality.

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Section: Discussionmentioning

confidence: 48%

Ethylene and Chitosan Affected the Seed Yield Components of Onion Depending More on the Dose than Timing of Application

et al. 2022

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Optimization of the elements of onion production technology in an annual crop in the conditions of central Russia

Fedosov

Bernaz

2022

BIO Web Conf.

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The object of research is onion, cultivated as an annual crop in the Nonchernozem zone of the Russian Federation. The aim of the research is to develop an improved technology for the production of bulb in an annual crop, providing a yield of 70-80 t/ha on alluvial meadow soils of the Nonchernozem zone. Research method - field test. It has been established that the probability of performing each technological operation should be at least 95%. Sowing the seeds, which are previously cleansed from the rot, must be done at an earlier date. The required yield was achieved at N 200 P 160 K 280 + Humic chemical "Rostok" + 10 l/ha BisolbiSan, Azotovit, Phosphatovit biopreparations in equal proportions. The use of the microbiological preparation BisolbiSan in 1% concentration with chemical two-component fungicides (excluding copper-containing ones) increases the immunity of onion plants. In conditions of warm, humid summer, fungicidal treatments of onions are optimal at intervals of 7-10 days from the third decade of June to the end of July. The maximum weed suppression is provided by the post-sowing application of the Stomp Professional + Dual Gold tank mix (3 + 1 l/ha) in combination with the subsequent pre-emergence treatment with Reglon Forte (2 l/ha) and the post-emergence Goal 2E (0.5 l/ha).

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Justification of technological indicators of machines for the production of bulb onion in an annual crop

Irkov

2024

BIO Web Conf.

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Onion is one of the main vegetable crops. Its consumption in Russia reaches 2.0 million tons. The gross harvest amounted to 1601.5 thousand tons in 2022 with a yield of 31.3 t/ha. The purpose of the research is to substantiate the technological performance of machines for the mechanized cultivation of onions in an annual crop, providing a yield of 70 - 80 t/ha, on alluvial meadow soils of the Non-Chernozem Zone of Russia. The research method is field experience. Issues considered: application of fertilizers, spring tillage, weed control in the previous field and during the growing season, pre-sowing treatment and sowing of seeds in the field, pest and disease control through foliar spraying, drip irrigation, harvesting work

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Plant Growth Regulator Effects on Germination and Root Traits of ‘Lambada’ and ‘Don Victor’ Onion Cultivars

Cited by 4 publications

References 30 publications

Ethylene and Chitosan Affected the Seed Yield Components of Onion Depending More on the Dose than Timing of Application

Ethylene and Chitosan Affected the Seed Yield Components of Onion Depending More on the Dose than Timing of Application

Optimization of the elements of onion production technology in an annual crop in the conditions of central Russia

Justification of technological indicators of machines for the production of bulb onion in an annual crop

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