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Journal : Vegetalika

Monitoring Ekspresi Gen Chalcone Synthase dan Respon Pertumbuhan Lobak Singgalang (Brassica oleracea L.) Akibat Paparan Ultraviolet-B Ekstrem Amar, Puti Khairunnajwa; Mansyurdin, Mansyurdin; Syafni, Nova; Syafia, Ersa Nur; Idris, Muhammad
Vegetalika Vol 14, No 2 (2025)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/veg.103190

Abstract

Singgalang cabbage (Brassica oleracea L.) is a local vegetable native to West Sumatra, cultivated in highlands around Mount Singgalang, Tanah Datar. Vegetables from Brassica genus are recognized for their high nutritional value and potential as functional foods. Key secondary metabolites in Brassica species, i.e., phenolic compounds and their derivatives, play a crucial role in antioxidant activity and are essential in promoting health. Light exposure, particularly ultraviolet-B (UV-B, 280-315 nm), can enhance biosynthesis of these compounds. UV-B intensity affects various process in plants including the phenylpropanoid pathway involved in secondary metabolite production. This study aimed to assess the expression of the CHALCONE SYNTHASE (CHS) gene under different UV-B intensities (0.3–3.0 µmol·m-2·s-1, 4 h) and examine the effects of two extreme UV-B intensities (0.3 and 3.0 µmol·m-2·s-1, 4h.d-1) in a controlled environment for 14 days. The results showed that increasing UV-B intensity enhanced CHS expression (1.0 and 3.0 µmol·m-2·s-1 showed thicker bands compared to 0.3 µmol·m-2·s-1, with a faint band in the control). Extreme UV-B exposure reduced chlorophyll content by 35–37% compared to the control, while carotenoids remained unaffected. Anthocyanin accumulation increased under low-intensity UV-B, whereas flavonoid levels were higher under high-intensity UV-B, suggesting different functional roles. UV-B exposure also influenced stomatal number and density in leaf. This preliminary study highlights the significant role of UV-B in enhancing specific metabolites in Singgalang cabbage, supporting its potential as a functional food.
Co-Authors ', Mardinus . Chairul . Yastori A.A. Ketut Agung Cahyawan W Ahmad Taufiq Aliya Ningsih Amar, Puti Khairunnajwa Amri Bakhtiar Anthoni Agustien Antonie Agustien Anzharni Fajrina Ardinis Arbain Asful, Ferdhinal Ashrifurrahman, Ashrifurrahman Aszareta, Muhammad Andoni Aziz, M. Abdul Catur Hermanto Chaidir P. Pulungan Chaidir P. Pulungan Dahelmi Dahelmi De Yudanur, Parissa Anandita Dilla, Arfa Iskhia Djoko Santoso Efrizal Efrizal Eli Ratni Elisa, Tasya Putri Pratama Elni Fatimah Elza Safitri Ema Susiana Enjelina, Weni Erizal Muchktar Fajri Hidayat Fitri Handayani Gusmardi Indra Hanifah - Aini Hendra Kusuma Henny Herwina Herwita Idris Indra Junaidi Zakaria Jabang Nurdin Janra, Muhammad Nazri Jasmi Jefrial Santoso Joko Ridho Witono Joko Ridho Witono Joko Ridho Witono M. Idris Maliza, Rita Mayta Novaliza Isda Miftahul Ilmi Mildawati Mildawati Moralita Chatri Muhammad Idris Muhammad Idris Musliar Kasim Nabila, Sylvia Nabilah Rahmachila Azura Netty W Surya Nofrita Nofrita Nofrita Nofrita Nova Syafni Nurainas Nurainas Nurmansyah Nurmansyah Perri Adnadi Pratama, Raihan Anugrah Putra Santoso Putri, Syntia Mai Revis Asra Revis Asra Ridho, Muhammad Syifa'ur Riki Rinaldi Rikinovtian Burlis Rudi Febriamansyah Sjahridal Dahlan Solfiyeni Solfiyeni Suci Rahma Nita Sukendi Sukendi Suwirmen, Suwirmen Syabila, Hutri Dinda Syafia, Ersa Nur Syaifullah Syaifullah Syakira Tiara Rezvi Syamsuardi Syamsuardi Tesri Maideliza Tesri Meideliza Tetty CHAIDAMSARI Tri Susanti TRIMURTI HABAZAR Wilson Novarino Yulia Sandri Yulmira Yanti Zaini Zaini Zozy Aneloi Noli