Effect of gibberellic acid on the cyanobacterium Nostoc linckia

Mansouri, Hakimeh; Talebizadeh, Bahareh

doi:10.1007/s10811-015-0756-5

Cited by 14 publications

(4 citation statements)

References 29 publications

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“…Improvement in the pigment content under exogenous supplementation of IAA/KN to Cr VI stressed cultures, could be attributed to (i) possible reduction in degradation of δ-aminolevulinic acid, (ii) stimulation in chlorophyll biosynthesis [42] and (iii) stabilization of thylakoid membrane [43]. Similar increase in ratio of Chl a/Cars and PBPs contents under IAA/KN supplementation was also noticed in earlier reports of Bajguz and Piotrowska-Niczyporuk [44] and Mansouri and Talebizadeh [45].…”

Section: Discussionsupporting

confidence: 79%

Phytohormone up-regulates the biochemical constituent, exopolysaccharide and nitrogen metabolism in paddy-field cyanobacteria exposed to chromium stress

2020

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Background: Cyanobacteria are well known for their inherent ability to serve as atmospheric nitrogen fixers and as bio-fertilizers; however, increased contaminants in aquatic ecosystem significantly decline the growth and function of these microbes in paddy fields. Plant growth regulators play beneficial role in combating the negative effects induced by heavy metals in photoautotroph. Current study evaluates the potential role of indole acetic acid (IAA; 290 nm) and kinetin (KN; 10 nm) on growth, nitrogen metabolism and biochemical constituents of two paddy field cyanobacteria Nostoc muscorum ATCC 27893 and Anabaena sp. PCC 7120 exposed to two concentrations of chromium (Cr VI ; 100 μM and 150 μM). Results: Both the tested doses of Cr VI declined the growth, ratio of chlorophyll a to carotenoids (Chl a/Car), contents of phycobiliproteins; phycocyanin (PC), allophycocyanin (APC), and phycoerythrin (PE), protein and carbohydrate associated with decrease in the inorganic nitrogen (nitrate; NO 3 and nitrite; NO 2-) uptake rate that results in the decrease in nitrate and ammonia assimilating enzymes; nitrate reductase (NR), nitrite reductase (NiR), glutamine synthetase (GS), glutamate synthase (GOGAT) except glutamate dehydrogenase (GDH). However, exogenous supplementation of IAA and KN exhibited alleviating effects on growth, nitrogen metabolism and exopolysaccharide (EPS) (first protective barrier against metal toxicity) contents in both the cyanobacteria, which probably occurred as a result of a substantial decrease in the Cr uptake that lowers the damaging effects. Conclusion: Overall result of the present study signifies affirmative role of the phytohormone in minimizing the toxic effects induced by chromium by stimulating the growth of cyanobacteria thereby enhancing its ability as biofertilizer that improved fertility and productivity of soil even in metal contaminated condition.

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Section: Discussionsupporting

confidence: 79%

Phytohormone up-regulates the biochemical constituent, exopolysaccharide and nitrogen metabolism in paddy-field cyanobacteria exposed to chromium stress

2020

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“…We did not find any report on the impact of plant growth regulators, including auxins on heterocyst differentiation. In our previous investigations, we demonstrated that both gibberellic acid (Mansouri & Talebizadeh ) and nitric oxide (Hakimeh Mansouri and Bahareh Talebizadeh 2015) had a slightly inhibitory effect on this process.…”

Section: Discussionmentioning

confidence: 89%

Effects of indole‐3‐butyric acid on growth, pigments and UV‐screening compounds in Nostoc linckia

Mansouri

Talebizadeh

2017

Phycological Research

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In the present research, the effect of indole-3-butyric acid (IBA) on the growth, and the production of some primary and secondary metabolites was studied in Nostoc linckia. In this respect, algae cultures were supplied with 0, 0.01, 0.1, 1, 10, and 100 μM IBA for 14 days. IBA at concentrations of 10 and 100 μM induced algal growth expressed as fresh weight in N. linckia. Treatment with IBA at all concentrations stimulated heterocyst formation. In addition, low concentrations of IBA (0.01, 0.1, and 1 μM) had a stimulatory effect on chlorophyll a and carotenoids accumulation. In contrast, higher concentrations of IBA induced the accumulation of phycocyanin, allophycocyanin, and phycoerythrin in the treated algae. In this case, IBA at the concentration of 10 μM was more effective. A significant decrease in protein content was observed in the algae treated by 0.01 μM IBA. All concentrations of IBA caused a decrease in sugar content, but lower concentrations were more effective. IBA application in all of the concentrations except 100 μM increased oligosaccharide-linked mycosporine-like amino acids (OS-MAAs) content. Lower concentrations had a more significant effect on increasing OS-MAAs content. However the concentrations of 10 and 100 μM IBA decreased scytonemin content. These results indicated the stimulatory impact of IBA on weight, heterocyst formation, and photosynthetic pigments in N. linckia. Fig. 6. The effect of different concentrations of IBA on oligosaccharide-linked mycosporine-like amino acids (OS-MAAs) and scytonemin contents of N. linckia after 14 days of cultivation. See the caption of Figure 1 for other information.

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“…vulgaris and Nostoc linkia (Falkowska et al. 2011, Mansouri and Talebizadeh 2016). The number of cells and thus dry weight increased in Microcystis aeruginosa by GA 3 treatment (Pan et al.…”

Section: Discussionmentioning

confidence: 99%

“…(2010) found that gibberellin promoted the growth of the microalga Haematococcus pluvialis and accumulation of astaxanthin. In addition, positive effects of gibberellic acid on biomass and biochemical parameters of Scenedesmus obliquus and Nostoc linckia were reported (Mansouri and Talebizadeh 2016, Mansouri and Ebrahim Nezhad 2020).…”

mentioning

confidence: 99%

Changes in growth and biochemical parameters in Dunaliella salina (Dunaliellaceae) in response to auxin and gibberellin under colchicine‐induced polyploidy

Mansouri

Nezhad

2021

Journal of Phycology

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We reported the significant effect of auxin and gibberellin on mixoploid cultures created by colchicine in Dunaliella salina. Polyploidy induction increased growth and the amount of all biochemical parameters measured in this work including chlorophyll, carotenoid, starch, glycerol, sugar, and protein. Treatment with colchicine 0.1%, which resulted in 58.26% of polyploid cells, had a better effect on increasing the amount of analyzed parameters. Auxin increased the amount of all measured parameters except protein. Low concentrations of auxin (1 and 10 µM) caused an increase in growth and the amount of chlorophyll, carotenoid, sugar, starch, glycerol, and protein in the cells treated with colchicine. Gibberellin significantly increased the amount of the mentioned parameters in a concentration‐dependent manner. In cultures treated with colchicine, additive effects of gibberellin were observed in glycerol, protein, starch, and sugar content. Our results showed that the use of phytohormones such as auxin and gibberellin can be a good way to increase the biochemical value of algal polyploid cell biomass.

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Effect of gibberellic acid on the cyanobacterium Nostoc linckia

Cited by 14 publications

References 29 publications

Phytohormone up-regulates the biochemical constituent, exopolysaccharide and nitrogen metabolism in paddy-field cyanobacteria exposed to chromium stress

Phytohormone up-regulates the biochemical constituent, exopolysaccharide and nitrogen metabolism in paddy-field cyanobacteria exposed to chromium stress

Effects of indole‐3‐butyric acid on growth, pigments and UV‐screening compounds in Nostoc linckia

Changes in growth and biochemical parameters in Dunaliella salina (Dunaliellaceae) in response to auxin and gibberellin under colchicine‐induced polyploidy

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