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Dergiler / Black Sea Journal of Agriculture / 2026 / Cilt: 9 Sayı: 5

Optimizing In Vitro Organogenesis in Sunflower (Helianthus annuus L.) Using Cotyledon and Root Node Explants

Ferzat Turan(SAKARYA UYGULAMALI BİLİMLER ÜNİVERSİTESİ, ZİRAAT FAKÜLTESİ, TARLA BİTKİLERİ BÖLÜMÜ)0000-0001-5960-6478
Aysun Örçün(Türkiye milli botanik bahçesi)0009-0002-6239-8651
Sayfa
865–875
Yayın Tarihi
2026-09-15
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⚡ TL;DR(1 Cümlede Hızlı Çıkarım)

These findings confirm that cotyledon node explants are more suitable for in vitro sunflower regeneration, providing a promising approach for the genetic improvement and micropropagation of sunflower.

📌 3 Maddede Bu Makale

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Amaç & Hipotez:Sunflower (Helianthus annuus L.) is widely recognized as a recalcitrant species in tissue culture, which severely restricts its micropropagation and genetic transformation efficiency.
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Temel Bulgular & Veri:To address this limitation, this study establishes a novel, highly efficient, and reproducible in vitro organogenesis protocol tailored for the commercial hybrid 'Sun 2239 CL.
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Sonuç & Katkı:These findings confirm that cotyledon node explants are more suitable for in vitro sunflower regeneration, providing a promising approach for the genetic improvement and micropropagation of sunflower.
🔬Tür:Araştırma Makalesi
📍Kapsam:Genişletilmiş Akademik Örneklem
⚙️Değişkenler:Cotyledon node · Cotyledon root · Micropropagation

Özet

Sunflower (Helianthus annuus L.) is widely recognized as a recalcitrant species in tissue culture, which severely restricts its micropropagation and genetic transformation efficiency. To address this limitation, this study establishes a novel, highly efficient, and reproducible in vitro organogenesis protocol tailored for the commercial hybrid 'Sun 2239 CL. Cotyledon node and root node explants were cultured in MS medium supplemented with various concentrations of BAP (0.00, 0.25, 0.50, 0.75, and 1.00 mg/L) in combination with NAA (0.10 mg/L). The results indicated that cotyledon node explants exhibited the highest shoot regeneration potential, with the highest shoot regeneration (3.0 shoots per explant) observed at BAP 0.25 mg/L + NAA 0.10 mg/L. Shoot length varied between 3.33 cm and 11.00 cm, with the longest shoots observed in the control group. Root node explants did not produce adventitious shoots but showed callus formation, with the highest callus weight (1.60 g) at BAP 1.00 mg/L + NAA 0.10 mg/L. These findings confirm that cotyledon node explants are more suitable for in vitro sunflower regeneration, providing a promising approach for the genetic improvement and micropropagation of sunflower.

Abstract

Sunflower (Helianthus annuus L.) is widely recognized as a recalcitrant species in tissue culture, which severely restricts its micropropagation and genetic transformation efficiency. To address this limitation, this study establishes a novel, highly efficient, and reproducible in vitro organogenesis protocol tailored for the commercial hybrid 'Sun 2239 CL. Cotyledon node and root node explants were cultured in MS medium supplemented with various concentrations of BAP (0.00, 0.25, 0.50, 0.75, and 1.00 mg/L) in combination with NAA (0.10 mg/L). The results indicated that cotyledon node explants exhibited the highest shoot regeneration potential, with the highest shoot regeneration (3.0 shoots per explant) observed at BAP 0.25 mg/L + NAA 0.10 mg/L. Shoot length varied between 3.33 cm and 11.00 cm, with the longest shoots observed in the control group. Root node explants did not produce adventitious shoots but showed callus formation, with the highest callus weight (1.60 g) at BAP 1.00 mg/L + NAA 0.10 mg/L. These findings confirm that cotyledon node explants are more suitable for in vitro sunflower regeneration, providing a promising approach for the genetic improvement and micropropagation of sunflower.

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Bu Makaleye Atıf Yap

Turan, F., Örçün, A. (2026). Optimizing In Vitro Organogenesis in Sunflower (Helianthus annuus L.) Using Cotyledon and Root Node Explants. Black Sea Journal of Agriculture, Cilt: 9 Sayı: 5, 865–875. https://doi.org/10.47115/bsagriculture.1985290

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