Indole-3-acetic acid (IAA) induced changes in oil content, fatty acid profiles and expression of four fatty acid biosynthetic genes in Chlorella vulgaris at early stationary growth phase

Jusoh, Malinna; Loh, Saw Hong; Chuah, Tse Seng; Aziz, Azimon Abdul; San, Thye

doi:10.1016/j.phytochem.2014.12.022

Cited by 81 publications

(37 citation statements)

References 54 publications

(73 reference statements)

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“…In our study, the fatty acid profiles were shown in Table 1, and were mainly composed of C16 and C17 FAs. Such fatty acid profiles were basically the same as those reported in [35,51], where JA-treated and IAA-treated C. vulgaris cells produced a high proportion of C16-C18 fatty acids. Mu et al found that fatty acid (C16-C18) compositions were also indispensable to endow excellent cold filter plugging point for fuels produced by algal biomass [60].…”

Section: The Lipids and High Value Pufas Analysissupporting

confidence: 84%

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The Effects of Plant Growth Regulators on Cell Growth, Protein, Carotenoid, PUFAs and Lipid Production of Chlorella pyrenoidosa ZF Strain

Ahmed

Lin

et al. 2017

Energies

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Abstract:In the present study, eight kinds plant growth regulators-salicylic acid (SA), 1-naphthaleneacetic acid (NAA), gibberellic acid (GA 3 ), 6-benzylaminopurine (6-BA), 2, 4-epi-brassinolide (EBR), abscisic acid (ABA), ethephon (ETH), and spermidine (SPD)-were used to investigate the impact on microalgal biomass, lipid, total soluble protein, carotenoids, and polyunsaturated fatty acids (PUFAS) production of Chlorella pyrenoidosa ZF strain. The results showed the quickest biomass enhancement was induced by 50 mg·L −1 NAA, with a 6.3-fold increase over the control; the highest protein content was increased by 0.005 mg·L −1 ETH, which produced 3.5-fold over the control; total carotenoids content was induced most effectively by 1 mg·L −1 NAA with 3.6-fold higher production than the control; the most efficient elicitor for lipid production was 5 mg·L −1 GA 3 at 1.9-fold of the control; 0.2 mg·L −1 ETH induced the abundant production of 1.82 ± 0.23% linoleic acid; 0.65 ± 0.01% linolenic acid was induced by 1 mg·L −1 NAA; 2.53 ± 0.15% arachidonic acid and 0.44 ± 0.05% docosahexaenoic acid were induced by 5 mg·L −1 GA 3 . Transcriptional expression levels of seven lipid-related genes, including ACP, BC, FAD, FATA, KAS, MCTK, and SAD, were studied by real-time RT-q-PCR. 5 mg·L −1 GA 3 was the most effective regulator for transcriptional expressions of these seven genes, producing 23-fold ACP, 31-fold BC, 25-fold FAD, 6-fold KAS, 12-fold MCTK compared with the controls, respectively.

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Section: The Lipids and High Value Pufas Analysissupporting

confidence: 84%

“…Earlier study reported that auxin is involved in control of many developmental processes in plants [49]. Exogenous application of phytohormone could not only stimulate microalgae growth but also trigger intracellular lipid biosynthesis at different levels [13,35,50,51].…”

Section: The Lipids and High Value Pufas Analysismentioning

confidence: 99%

The Effects of Plant Growth Regulators on Cell Growth, Protein, Carotenoid, PUFAs and Lipid Production of Chlorella pyrenoidosa ZF Strain

Ahmed

Lin

et al. 2017

Energies

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“…In the microalgae S. obliquus, poly-unsaturated fatty acid content reached up to 56% at 10 −5 M IAA, while the highest carbohydrate content and the highest protein content (34%) were achieved at 10 −8 M [17]. Similar evidence was found in C. vulgaris [23], in which IAA exhibited the highest accumulation of lipids with enriched palmitic (C16:0) and stearic (C18:0) acids. Auxins can also enhance, in addition to growth and lipids, the biosynthesis of pigments, monosaccharides, and soluble proteins in C. vulgaris [20].…”

Section: Introductionsupporting

confidence: 66%

Phytohormones and Effects on Growth and Metabolites of Microalgae: A Review

et al. 2018

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Microalgae cultivation is booming in agriculture, aquaculture, and bioenergy sectors. A wide range of bioactive compounds with attractive properties can be produced with microalgae, including pigments, vitamins, proteins, carbohydrates, and lipids. The biofuel yields from microalgae can exceed the yields obtained with energy crops by 10-100 times. Therefore, such cultivation is promising for the regulation of the biosynthesis of microalagae with phytohormones, which can enhance the production of high-valued bioproducts. This review reports the effect of auxins, abscisic acid, cytokinins, gibberellins, and ethylene on microalgal growth and metabolites, as well as the crosstalk of different phytohormones. The use of phytohormones is also promising because it can also reduce the inputs necessary to grow the selected microalgae and maximize the yields.

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“…G. geotrichum) with BC increased fatty acid content; however, various studies obtained the same results for the association of endophytic fungi with their host plants (Khan et al, 2012a;2012b). In these and other studies, the production of secondary metabolites (mainly phytohormones) by endophytes was found to be the main reason for this effect (Khan et al, 2012a;2012b;Jusoh et al, 2015). Furthermore, GA production by endophytes (Khan et al, 2012a;2012b) and the exogenous application of IAA (Jusoh et al, 2015) have been reported to modulate fatty acids in plants under normal and stress conditions.…”

Section: Discussionmentioning

confidence: 67%

Additive effects due to biochar and endophyte application enable soybean to enhance nutrient uptake and modulate nutritional parameters

Waqas

Kim

Khan

et al. 2017

J. Zhejiang Univ. Sci. B

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Abstract:We studied the effects of hardwood-derived biochar (BC) and the phytohormone-producing endophyte Galactomyces geotrichum WLL1 in soybean (Glycine max (L.) Merr.) with respect to basic, macro-and micronutrient uptakes and assimilations, and their subsequent effects on the regulation of functional amino acids, isoflavones, fatty acid composition, total sugar contents, total phenolic contents, and 1,1-diphenyl-2-picrylhydrazyl (DPPH)-scavenging activity. The assimilation of basic nutrients such as nitrogen was up-regulated, leaving carbon, oxygen, and hydrogen unaffected in BC+G. geotrichum-treated soybean plants. In comparison, the uptakes of macro-and micronutrients fluctuated in the individual or co-application of BC and G. geotrichum in soybean plant organs and rhizospheric substrate. Moreover, the same attribute was recorded for the regulation of functional amino acids, isoflavones, fatty acid composition, total sugar contents, total phenolic contents, and DPPH-scavenging activity. Collectively, these results showed that BC+G. geotrichum-treated soybean yielded better results than did the plants treated with individual applications. It was concluded that BC is an additional nutriment source and that the G. geotrichum acts as a plant biostimulating source and the effects of both are additive towards plant growth promotion. Strategies involving the incorporation of BC and endophytic symbiosis may help achieve eco-friendly agricultural production, thus reducing the excessive use of chemical agents.

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Indole-3-acetic acid (IAA) induced changes in oil content, fatty acid profiles and expression of four fatty acid biosynthetic genes in Chlorella vulgaris at early stationary growth phase

Cited by 81 publications

References 54 publications

The Effects of Plant Growth Regulators on Cell Growth, Protein, Carotenoid, PUFAs and Lipid Production of Chlorella pyrenoidosa ZF Strain

The Effects of Plant Growth Regulators on Cell Growth, Protein, Carotenoid, PUFAs and Lipid Production of Chlorella pyrenoidosa ZF Strain

Phytohormones and Effects on Growth and Metabolites of Microalgae: A Review

Additive effects due to biochar and endophyte application enable soybean to enhance nutrient uptake and modulate nutritional parameters

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