Aninbon, Chorkaew
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Genotypic Variability of Total Phenolic Compounds and Antioxidant Activity in Jerusalem Artichoke (Helianthus tuberosus L.) Germplasm Ruttanaprasert, Ruttanachira; Jogloy, Sanun; Sennoi, Rattikarn; Aninbon, Chorkaew; Puttha, Ratchanee; Janket, Anon; Pinta, Wanwipa; Senawong, Thanaset
AGRIVITA Journal of Agricultural Science Vol 46, No 3 (2024)
Publisher : Faculty of Agriculture University of Brawijaya in collaboration with PERAGI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17503/agrivita.v46i3.4413

Abstract

This research examines the variability in tuber yield, yield component, phenolic compounds, and antioxidant activity of twenty-five Jerusalem artichoke genotypes. The field experiment is arranged using a randomized complete block design with three replications. The plant tubers are harvested at maturity and recorded for tuber dry weight, total phenolic content, and antioxidant activity. The results show significant genetic variations in tuber dry weight, phenolic content, and antioxidant activity determined by FRAP and ABTS methods. Significant and positive correlations are found among individual tuber dry weight, number of tubers per plant, tuber dry weight, including phenolic content, and antioxidant activity determined by the FRAP method. Jerusalem artichoke genotypes are classified into five groups based on tuber dry weight, phenolic content, and antioxidant activity determined by DPPH and FRAP methods. KT504 is identified as the accession with high levels of tuber dry weight, phenolic content, and antioxidant activity, and this genotype might be used as a material source for the pharmaceutical industry. Total phenolic content in the tuber can serve as an index for selecting Jerusalem artichoke genotypes with direct high antioxidant activity.
Influence of Harvesting Time on Phytochemical Content of Colored Brown and Parboiled Rice Rodnuch, Nattareeporn; Burum, Kiattisak; Aninbon, Chorkaew
AGRIVITA Journal of Agricultural Science Vol 47, No 1 (2025)
Publisher : Faculty of Agriculture University of Brawijaya in collaboration with PERAGI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17503/agrivita.v47i1.4377

Abstract

Colored rice receives more attention from consumers because of its high phytochemicals and antioxidant activity beneficial to health. The aims of this investigation were to quantify the important phytochemicals and antioxidant activity in three varieties of colored rice for production of parboiled rice and to determine the effects of harvest time on phytochemicals and antioxidant activity in parboiled rice. Three colored rice varieties were planted in a split plot design with four replications. Main-plot was three rice varieties and sub-plot consisted four harvesting dates including 15, 20, 25 and 30 days after anthesis (DAA). Sangyod had the highest total phenolic content (77.34 mg GAE/100g), and harvest at 15 DAA provided the highest phenolic content (63.53 and 109.47 mg GAE/100g in brown and parboiled rice). Riceberry had the highest anthocyanin (65.91 mg/g seed), and harvest at immature stages gave the highest anthocyanin content. Riceberry also had the highest GABA content and harvest at 15 DAA had the highest GABA content. Harvest at 15 DAA had the highest antioxidant activities. Parboiling increased total phenolic content in Riceberry and Tubtin Chumphae and it increased GABA content in all rice varieties, but it reduced anthocyanin content.