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

Abstract

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.

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

“…Also, auxin treatment caused an increase in the fresh weight on Nostoc. linckia algae; and the result was consistent with results of the present study (Mansouri and Talebizadeh 2017). As seen in the cultures treated with colchicine 0.5%, the cell division rate decreased in the culture that could be the reason for reduction of fresh and dry weights of algae (Soltani Nezhad and Mansouri 2019).…”

“…In this parameter, the enhancement effect of hormones on polyploidy created by colchicine could be seen, especially at 1 and 10 µM of hormones. Mansouri and Talebizadeh (2017) reported that low concentrations of IBA increased chlorophyll a , total chlorophyll and carotenoid content in Nostoc. linckia .…”

“…Gibberellins and auxins are two types of plant growth regulators involved in numerous aspects of plant growth and development. Improvement of microalgal growth rate and increased synthesis of valuable compounds using auxins has been reported in many algae species (Piotrowska‐Niczyporuk and Bajguz 2014, Mansouri and Talebizadeh 2017, Dao et al. 2018).…”

Effects of different UV radiation on photoprotective pigments and antioxidant activity of the hot‐spring cyanobacterium Leptolyngbya cf. fragilis

“…Cyanobacteria are a promising renewable source of bioactive secondary metabolites can be biotechnologically and commercially exploited in several ways (Mansouri & Talebizadeh 2017). Moreover, their growth, survival, MAAs and scytonemin production, pigmentation, nitrogen fixation, phycobilisome assembly, and carbon uptake have been shown to be affected by some abiotic factors such as different wavelength bands of UV radiation, desiccation, nutrients and salt concentration (Sinha et al 2003;Rastogi & Incharoensakdi 2014b).…”

Sampling Frequency Is a Key Factor to the Efficient Actuation of the Phytohormones in the Increase of Biomass and Macromolecules Production by Spirulina (Arthorspira)

“…In the literature, there are many relates to phytohormone supplementation in the cultivation of eukaryotic microalgae genres as Chlorella [11][12][13][14][15][16] and Scenedesmus [15,17,18]. Nevertheless, there are fewer studies about the use of this strategy to increase the cyanobacteria biomass [19][20][21], and it was found just one with Spirulina [22]. Spirulina is the most known cyanobacteria and one of the most-studied microalgae in the world [1].…”