Improving Crop Yields by the Application of an Auxin Precursor L-tryptophan

Zahir, Z. A.; Малик,; Arshad, Muhammad

doi:10.3923/pjbs.2000.133.135

Cited by 11 publications

(2 citation statements)

References 6 publications

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“…Trp serves as a key precursor to the plant hormone auxin, indole acetic acid. The application of Trp at suitable concentrations can distinctly impact plant growth due to the slow and gradual release of indole acetic acid from L-Trp [40]. Trp plays various roles Remarkably, the application of a 300 mg/L concentration of Trp to the plants resulted in significant changes in the chemical composition of the fruit extract.…”

Section: Discussionmentioning

confidence: 99%

“…Trp serves as a key precursor to the plant hormone auxin, indole acetic acid. The application of Trp at suitable concentrations can distinctly impact plant growth due to the slow and gradual release of indole acetic acid from L-Trp [40]. Trp plays various roles in plants, including acting as an osmolyte, regulating ion transport, modulating stomatal opening, and contributing to defense mechanisms [41].…”

Section: Discussionmentioning

confidence: 99%

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Enhancing Growth, Yield, and Antioxidant Activity of Bitter Gourd (Momordica charantia L.) through Amino Acid Foliar Spray Application

El-Khayat,

Elbagory,

Elsadek

et al. 2023

Horticulturae

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Bitter gourd has picked up noteworthy consideration for its pharmacological benefits. However, the impact of amino acids (AAs) dosage on growth, yield, and antioxidants is uncertain. In this study, we investigated the effects of foliar spraying bitter gourd with 100, 200, and 300 mg/L dosages of tryptophan (Trp), glutamine (Gln), and phenylalanine (Phe). The results revealed that Trp, at a dosage of 300 mg/L, produced the most substantial increase in plant length, followed by 300 mg/L Phe. Additionally, the highest values of the fresh dry weight of the plants, fresh weight of the first fruit, fruit number per plant, fresh weight of the fruits per plant, and total fruit output per hectare were seen at 300 mg/L of Trp, followed by 300 mg/L of Gln. Phe at 300 mg/L yielded the highest levels of total phenolics and total flavonoids, coupled with strong scavenging activity against 2,2-diphenyl-1-picrylhydrazyl. These outcomes show the potential of Trp and Gln foliar sprays to enhance bitter gourd growth, yield, and certain antioxidant compounds. These findings carry substantial implications for the enhancement of bitter gourd cultivation and quality. By revealing AA’s potential for improving bitter gourd, our research contributes to bolstering the agricultural sustainability of this remarkable crop.

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Section: Discussionmentioning

confidence: 99%

“…Trp serves as a key precursor to the plant hormone auxin, indole acetic acid. The application of Trp at suitable concentrations can distinctly impact plant growth due to the slow and gradual release of indole acetic acid from L-Trp [40]. Trp plays various roles in plants, including acting as an osmolyte, regulating ion transport, modulating stomatal opening, and contributing to defense mechanisms [41].…”

Section: Discussionmentioning

confidence: 99%

Enhancing Growth, Yield, and Antioxidant Activity of Bitter Gourd (Momordica charantia L.) through Amino Acid Foliar Spray Application

El-Khayat,

Elbagory,

Elsadek

et al. 2023

Horticulturae

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Phytohormonal basis for the plant growth promoting action of naturally occurring biostimulators

Kurepin

Zaman

Pharis

2014

J. Sci. Food Agric.

101

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There is increasing interest in the use of naturally occurring 'biostimulators' for enhancing the growth of agricultural and horticultural crops. Bacteria, fungi and protozoa, as well as marine algae-based seaweed extracts, can produce or contain biostimulators. The activity of biostimulators to promote plant growth is often attributed to their ability to directly or indirectly provide mineral nutrients (mostly N, but also P, S and other macro- and micro-nutrients) to plants. Alternatively, biostimulators are postulated to increase the plant's ability to assimilate these mineral nutrients, often in return for photo-assimilates (as occurs with certain bacteria and fungi associations). Although optimal growth of plants depends on the availability of adequate mineral nutritients, that growth (and also development, including reproduction) is also regulated by plant hormones (phytohormones), including gibberellins, auxins and cytokinins. This review describes and discusses the evidence that the presence or application of biostimulators also increases plant growth directly via phytohormone action and also influences the plant's ability to control its own hormone biosynthesis and homeostasis. Finally, it discusses the need for a better understanding of the role(s) that are played by the naturally occurring biostimulators associated with the plant in the crop field. It is suggested that better understanding will allow for optimal crop yield returns, since disruptions of phytohormone homeostasis in plant organs and tissues can yield either beneficial or sub-optimal outcomes.

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Conversion of l‐Tryptophan Derivatives into Biologically Active Amino Acid Ionic Liquids

et al. 2021

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Natural auxins are a group of plant hormones that affect plant growth and development. The most common auxin is indole-3acetic acid (IAA), which is mainly synthesized from tryptophan. Since converting synthetic auxins into an ionic liquid increases their herbicidal activity, an attempt was made to synthesize new amino acid ionic liquids (AAILs) with l-tryptophanate anions. As a result of the synthesis, two homologous series, tetraalkylammonium l-tryptophanates and dialkyldimethylammonium l-tryptophanates, were obtained with yields exceeding 95 %. For the obtained AAILs, basic physicochemical properties (solubility in solvents of different polarity, thermal stability, phase changes, and surface activity) were determined, and whether the obtained salts act as growth stimulants for lettuce (Lactuca sativa L.) was evaluated. The transformation of l-tryptophan into AAILs improved the physicochemical properties and increased the auxin activity. In addition, the higher content of nutrients (micro-and macroelements) made lettuce a healthier food product.

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Improving Crop Yields by the Application of an Auxin Precursor L-tryptophan

Cited by 11 publications

References 6 publications

Enhancing Growth, Yield, and Antioxidant Activity of Bitter Gourd (Momordica charantia L.) through Amino Acid Foliar Spray Application

Enhancing Growth, Yield, and Antioxidant Activity of Bitter Gourd (Momordica charantia L.) through Amino Acid Foliar Spray Application

Phytohormonal basis for the plant growth promoting action of naturally occurring biostimulators

Conversion of l‐Tryptophan Derivatives into Biologically Active Amino Acid Ionic Liquids

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