Optimization of Indole-3-Acetic Acid Concentration in a Nutrient Solution for Increasing Bioactive Compound Accumulation and Production of Agastache rugosa in a Plant Factory

Lam, Vu Phong; Lee, Mun Haeng; Park, Jong‐Seok

doi:10.3390/agriculture10080343

Cited by 9 publications

(10 citation statements)

References 38 publications

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“…The ability of DPM17 to produce growth regulators (IAA and gibberellins) also confirms its plant-stimulation capability. IAA is a plant hormone that improves seed germination and the growth of different plant organs even at 10 −9 -10 −12 M [35,36]. In this study, DPM17 produced 5.04 µg mL −1 IAA, which is similar to that produced by Bacillus sp.…”

Section: Discussionsupporting

confidence: 58%

Plant Growth-Promoting Bacterium from Non-Agricultural Soil Improves Okra Plant Growth

2022

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Beneficial soil microorganisms influence nutrient recycling, soil fertility, plant growth, and productivity and reduce chemical fertilizer application. This study aimed to isolate bacteria from non-agricultural soils in the Al-Ahsa region and characterize the bacteria with the best biostimulating characteristics at the physiological, biochemical, and molecular level. DPM17, a bacterial isolate, promotes plant growth through phosphate solubilization, nitrogen fixation, and ammonia production. DPM17 also produces the phytohormones, indole acetic acid (IAA; 4.516 μg mL−1) and gibberellin (1.33 µg mL−1), and ammonia (0.06 µg mL−1). Additionally, DPM17 grows in the presence of up to 10% NaCl, indicating its halophilic nature. DPM17 was identified as Bacillus baekryungensis based on comparative sequence analysis of the 16S rRNA gene, and neighbor-joining phylogenetic analyses indicated that DPM17 was 96.51% identified to Bacillus sp. DPM17 inoculation substantially improved Abelmoschus esculentus (okra) root length, lateral root count, and dry weight from 7.03 to 9.41 (p = 0.03), 3.2 to 7.2, and 6 to 13 mg (p = 0.032), respectively. The results suggest that DPM17 enhances plant growth and can be exploited to develop efficient formulations for sustainable agriculture and food security in Saudi Arabia.

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Section: Discussionsupporting

confidence: 58%

Plant Growth-Promoting Bacterium from Non-Agricultural Soil Improves Okra Plant Growth

2022

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“…Many studies have reported that EC levels of nutrient solutions affect the growth of various crops [19,20,33]. In our study, most of the growth characteristics of red perilla decreased as the EC levels increased, and NSP 1 dS m −1 showed the highest values compared with other EC levels of CT and NSP, which implies that NSP 1 dS m −1 was appropriate for the growth of red perilla.…”

Section: Growth Characteristicssupporting

confidence: 54%

“…The total phenolic, RA, and CA concentration of red perilla increased as the EC levels increased, which showed an opposite trend to growth characteristics. In contrast, previous studies reported that a low-nutrient solution increased the RA content in green and red perilla, Prunella vulgaris, and Agastache rugosa [20,33,49]. The deficiency of some minerals, such as nitrogen, phosphorus, and potassium, causes a decrease in the phenolic contents of crops [50].…”

Section: Biochemical Parametersmentioning

confidence: 90%

“…The optimal EC level range should be from 1.5 to 3.5 dS m −1 for most hydroponic crops, but this value varies between crop species and phenological stages [17]. Many studies have been conducted to investigate the effects of EC levels on nutrient solutions of vegetables, crops, and medicinal plants [18][19][20][21]. This study aimed to establish a new nutrient solution for a suitable absorption rate of red perilla and evaluate the effect of EC levels of newly-developed nutrient solution for perilla on the growth, mineral content, and bioactive compounds accumulation in red perilla grown in plant factories.…”

Section: Introductionmentioning

confidence: 99%

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Effect of a Newly-Developed Nutrient Solution and Electrical Conductivity on Growth and Bioactive Compounds in Perilla frutescens var. crispa

Nguyen

Yeom

2021

Agronomy

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We evaluated the effect of a newly-developed nutrient solution of red perilla (NSP) with various electrical conductivity (EC) levels on plant growth, mineral content, and bioactive compounds. Four-week-old seedlings were grown in greenhouse nutrient solution as control (CT) (EC 1–3 dS m−1) or NSP (EC 1–6 dS m−1). NSP 1 dS m−1 induced better growth characteristics, whereas higher EC levels inhibited plant growth. Most of the macro-elements contents significantly decreased under NSP 6 dS m−1, whereas the micro-elements contents fluctuated according to EC levels. Total phenolic concentration in NSP was lower than that in CT, and total phenolic content was highest under NSP 1 dS m−1. Total anthocyanin and antioxidant concentrations and contents increased at lower EC levels. Rosmarinic and caffeic acids concentrations increased at higher EC levels, whereas there were no significant differences in these compound contents among the EC levels. No difference in perillaldehyde concentration was observed, whereas the content was higher at lower EC levels. Overall, these results suggest that NSP 1 dS m−1 is suitable for cultivating red perilla in plant factories.

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“…IAA stimulates root and stem development, lateral root initiation, root elongation by increasing cell division and extension (Lam et al, 2020). The tomato plants subjected to this research were at the mature stage (25 days) and the fruiting stage (50 days).…”

Section: Discussionmentioning

confidence: 99%

Determination of age-dependent endogenous indole-3 acetic acid (IAA) level in different organs of tomato plants

Ahmed¹,

Islam²,

Parvin³

et al. 2022

crbb

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Indole-3-acetic acid (IAA), a phytohormone, is a crucial modulator of plant growth and development. As increased levels of endogenous IAA is responsible for inhibitory effects on plants, knowing its concentration would be helpful for controlling exogenous IAA input. An optimum endogenous IAA level is required for proper growth and development of plant with good health status. Hence, in this study, we have detected and measured IAA present in tomato root, shoot, leaves and fruits at two different ages (25 days and 50 days) by Reversed-Phase High Performance Liquid Chromatography (RP-HPLC), a suitable chromatographic method for separating molecules based on hydrophobicity. We observed that the endogenous level of IAA was significantly higher in roots, shoots, leaves and fruits at 50-days old plant compared to 25-days old mature plant (p-value <0.01). These results suggested that the IAA level may increase with the increase of the age of tomato plants. The tomato plants showed good vigor with IAA range 0.3-3.0 µg/g.F.W (25 days) and 3.4-7.5 µg/g.F.W (50 days) of age, respectively, implying that IAA might be used as a possible plant health indicator. Further study is needed to manipulate the IAA concentration for adequate plant growth and development.

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Optimization of Indole-3-Acetic Acid Concentration in a Nutrient Solution for Increasing Bioactive Compound Accumulation and Production of Agastache rugosa in a Plant Factory

Cited by 9 publications

References 38 publications

Plant Growth-Promoting Bacterium from Non-Agricultural Soil Improves Okra Plant Growth

Plant Growth-Promoting Bacterium from Non-Agricultural Soil Improves Okra Plant Growth

Effect of a Newly-Developed Nutrient Solution and Electrical Conductivity on Growth and Bioactive Compounds in Perilla frutescens var. crispa

Determination of age-dependent endogenous indole-3 acetic acid (IAA) level in different organs of tomato plants

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