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Author: search.filters.author.Janket, AnonSubject: search.filters.subject.Jerusalem artichoke

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    Adaptive responses of Jerusalem artichoke to mid-season drought: effects on phenolic compounds and p-coumaric acid content
    (2025-12-01)
    Ruttanaprasert, Ruttanachira
    ;
    Jogloy, Sanun
    ;
    Janket, Anon
    ;
    Siripipatthana, Patthraporn
    ;
    Senawong, Thanaset
    Background: Drought stress can influence the accumulation of phenolic compounds in plants. This study investigated the adaptive response of Jerusalem artichoke to mid-season drought stress, focusing on changes in total phenolic content and p-coumaric acid contents. Methods: A pot experiment was conducted using a 2 × 5 factorial arrangement in a randomized complete block design with three replications. Factor A comprised two irrigation treatments: field capacity (FC) and mid-season drought stress (maintaining 50% available soil water [50% AW] from 31 to 60 days after transplanting). Factor B included five Jerusalem artichoke genotypes with varying levels of drought resistance: JA 3, JA 125, JA 15, JA 89, and CN52867. Results: Mid-season drought significantly decreased leaf relative water content at 60 days after transplanting of Jerusalem artichoke in both years (73.2% in year 1 and 74.2% in year 2). Drought significantly affects total phenolic content in leaf and stem at 90 DAT but does not affect TPC in tuber. Genotype JA 125 showed high total phenolic content under drought conditions in leaf (38.3 mg GAE/g dry weight), stem (24.3 mg GAE/g dry weight) and tuber (9.0 mg GAE/g dry weight), especially in the second year. The JA3 genotype showed stability for increased accumulation of total phenolic contents under drought stress and this genotype also accumulated the highest p-coumaric acid (15.4 mg GAE/g dry weight) under drought stress. These findings highlight the potential of Jerusalem artichoke as a source of bioactive compounds and these genotypes can serve as breeding sources to enhance the drought resistance and high phenolic content of Jerusalem artichoke.
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    Genotypic Variability of Total Phenolic Compounds and Antioxidant Activity in Jerusalem Artichoke (Helianthus tuberosus L.) Germplasm
    (2024-01-01)
    Ruttanaprasert, Ruttanachira
    ;
    Jogloy, Sanun
    ;
    Sennoi, Rattikarn
    ;
    Aninbon, Chorkaew
    ;
    Puttha, Ratchanee
    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 FRAPmethod. 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.