ArticleBotanical studies2025
Effects of plant growth regulators on Orobanche coerulescens seed germination.
Article in Botanical studies, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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7 authors.
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Abstract
background orobanche coerulescens, used in traditional medicine and as a nutraceutical, requires external chemical stimuli for seed germination, similar to other Orobanchaceae species. This study aims to explore the effects of plant growth regulators conditioning and non-conditioning on its seed germination. Seeds collected from mature plants parasitizing A. capillaris were stored at 4 °C to induce dormancy and sterilized with NaOCl. Seeds were sterilized with NaOCl and Tween 20, and preconditioned on agar with gibberellic acid (GA3), fluridone, norflurazon, or brassinolide, and incubated at 4–18 °C for 3–7 days in darkness. Afterward, seeds were transferred to GR24 or SD H2O agar, and incubated at 23 ± 2 °C. Non-conditioned sterilized seeds were directly germinated on agar with various substances and incubated for 180 days.
resultsSeeds exhibited a viability of 39.23% at the fifth day after TTC-staining. Fluridone and norflurazon significantly promote germination during conditioning with SD H2O or GR24. The highest germination rate occurred with fluridone-conditioned seeds at 18 °C for 5 days, followed by SD H2O stimulation. However, GR24 may act as an inhibitor rather than a stimulant.
conclusionsThese findings enhance our understanding of seed germination in this parasitic species, which can aid in conservation efforts.
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