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

Han, Xueyao; Huiru, Zeng; Bartocci, Pietro; Fantozzi, Francesco; Yan, Yunjun

doi:10.3390/fermentation4020025

Cited by 103 publications

(56 citation statements)

References 91 publications

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“…2 c, d), suggesting that the combined addition strategy can mitigate oxidative injury through enhancing the activity of antioxidant enzymes. Similarly, some evidence indicates that plant hormone can regulate the oxidative stress response in microalgae (Han et al 2018 ). For instance, the addition of abscisic acid can greatly reduce the oxidative stress in Chlamydomonas reinhardtii through enhancing the CAT and APX activities.…”

Section: Discussionmentioning

confidence: 97%

Enhancing biomass and lipid accumulation in the microalgae Schizochytrium sp. by addition of fulvic acid and EDTA

Sun

Ren

et al. 2018

AMB Expr

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Enhancing lipid productivity and reducing oxidative damage is essential for lipid overproduction in microalgae. In this study, addition of 20 mg/L fulvic acid (FA) resulted a 34.4% increase of lipid yield in Schizochytrium sp. Furthermore, the cooperative effect of FA and EDTA on cell growth and lipid production was investigated. The combined addition of 20 mg/L FA and 1.0 g/L EDTA yielded a maximal cell dry weight of 130.7 g/L and lipid productivity of 1.16 g/L/h, representing 36.4% and threefold increase over the non-supplemented group, respectively. Moreover, compared with the non-supplemented group, the combined addition strategy exhibited overall lower levels of reactive oxygen species and malondialdehyde, which accompanied with 66.7% and 81.9% higher superoxide dismutase and catalase activity, respectively. Furthermore, a 24.1–37.1% increase of malic enzyme and 19.4–25.2% decrease of phosphoenolpyruvate carboxylase activity was observed during the entire fermentation stage (0–108 h). Results suggested that the combined addition strategy not only enhanced lipid accumulation, but also prevented the lipid peroxidation.

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Section: Discussionmentioning

confidence: 97%

Enhancing biomass and lipid accumulation in the microalgae Schizochytrium sp. by addition of fulvic acid and EDTA

Sun

Ren

et al. 2018

AMB Expr

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“…Increasing evidences suggested that phytohormones can regulate the oxidative stress response of microalgae [ 66 换一个新的]. For example, the activities of CAT and APX were markedly increased in response to oxidative stress in ABA-treated Chlamydomonas reinhardtii [ 67 ].…”

Section: Manipulation Of Stresses By Different Cultivation Modesmentioning

confidence: 99%

Microalgae for the production of lipid and carotenoids: a review with focus on stress regulation and adaptation

Sun

Ren

Zhao

et al. 2018

Biotechnol Biofuels

306

129

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Microalgae have drawn great attention as promising sustainable source of lipids and carotenoids. Their lipid and carotenoids accumulation machinery can be trigged by the stress conditions such as nutrient limitation or exposure to the damaging physical factors. However, stressful conditions often adversely affect microalgal growth and cause oxidative damage to the cells, which can eventually reduce the yield of the desired products. To overcome these limitations, two-stage cultivation strategies and supplementation of growth-promoting agents have traditionally been utilized, but developing new highly adapted strains is theoretically the simplest strategy. In addition to genetic engineering, adaptive laboratory evolution (ALE) is frequently used to develop beneficial phenotypes in industrial microorganisms during long-term selection under specific stress conditions. In recent years, many studies have gradually introduced ALE as a powerful tool to improve the biological properties of microalgae, especially for improving the production of lipid and carotenoids. In this review, strategies for the manipulation of stress in microalgal lipids and carotenoids production are summarized and discussed. Furthermore, this review summarizes the overall state of ALE technology, including available selection pressures, methods, and their applications in microalgae for the improved production of lipids and carotenoids.

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“…Phytohormones are chemical messengers that can affect plant morphogenesis (Han et al, 2018). Apical dominance is the primary mechanism that regulates plant sprouting, which is mainly influenced by the levels of auxin and cytokinins (Bangerth, 1994), the ratio of auxin to cytokinin (Shimizu and Mori, 2001;Muradoglu et al, 2009), or the nutritional status of the axillary bud (Cline, 2000).…”

Section: Discussionmentioning

confidence: 99%

Modeling and Forecasting Cherry Production in Turkey

2020

THE JAPS

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Trunk-extension pruning is often used to promote sprouting of latent buds, and therefore extend the vertical growth of the main trunk in young Paulownia plantation in China. However, the biological basis for the technique remains unclear. In this study, we applied two pruning treatments and a control to 120 and 108 three-year-old Paulownia trees in 2015 and 2016, respectively. We observed the latent buds sprouting in 2015, and found that the number of individuals of first sprouting/total number of individuals and number of sprouted buds/total number of sprouted buds both exceeded 50% from 18 to 24 days after pruning.We collected phloem samples from the top of the stem at 7, 14, 21, and 28 d after the pruning in 2016. We then analyzed phytohormones, total C and N, reduced sugar and free amino acid contents of the samples. Results showed that pruning significantly reduced the contents of abscisic acid (ABA) and indole-3-acetic acid (IAA), especially on day 21 as compared with control. This was coincided with the sprouting of latent buds in the two pruned treatments. Therefore reduced IAA, ABA contents in pruned trees promoted the sprouting of latent buds. Our results provide a biological basis for extending the main trunk height.

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

Cited by 103 publications

References 91 publications

Enhancing biomass and lipid accumulation in the microalgae Schizochytrium sp. by addition of fulvic acid and EDTA

Enhancing biomass and lipid accumulation in the microalgae Schizochytrium sp. by addition of fulvic acid and EDTA

Microalgae for the production of lipid and carotenoids: a review with focus on stress regulation and adaptation

Modeling and Forecasting Cherry Production in Turkey

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