Salinity induced oxidative stress enhanced biofuel production potential of microalgae Scenedesmus sp. CCNM 1077

Optimizing light regimes on growth and lipid accumulation in Ankistrodesmus fusiformis H1 for biodiesel production

“…High ratios of Car/Chl or increased carotenoids contents suggest the protective function against photooxidative damage in microalgae. Similar to previous studies, it was noteworthy that under the optimized culture, the changes of photosynthetic activity and Chl contents occurred in an opposite manner with lipid accumulation in oleaginous microalgae (Pancha et al, 2015;He et al, 2015b). The changes in A. fusiformis H1 further illustrated that the culture strategy applied to this microalgae had some extend of stress leading the cells to defend against the oxidative damage.…”

“…Consequently, the Car/Chl a ratio, a sensitive marker of stress, significantly increased (data not show). Reduction in photosynthetic pigments like Chl a is a common stress response in plants and microalgae (Pancha et al, 2015). Carotenoids play a major role in photoprotection, it acts as quenchers for Chl excited states and also scavengers for reactive oxygen species eventually formed (Simionato et al, 2013;He et al, 2015b).…”

“…The three main modes are summarized as follows: (a) low levels of carbohydrate and high levels of TAG, (b) high levels of carbohydrate and low levels TAG, (c) moderate levels of both biochemical compositions. In addition, the competition between lipid and carbohydrate synthesis in microalgae had been discussed in many stressful conditions (Pancha et al, 2015;He et al, 2015b). In summary, it indicated that lipid storage preferred than carbohydrate in a long time based on the fact that the energy demand for lipid biosynthesis was much higher than that of carbohydrate, furthermore, it can use the carbon skeleton from carbohydrate decomposition.…”

Bicarbonate supplementation enhanced biofuel production potential as well as nutritional stress mitigation in the microalgae Scenedesmus sp. CCNM 1077

“…significantly affect the growth and biochemical composition of microalgae . Many cultivation strategies like nitrogen starvation, salinity stress and temperature stress significantly enhanced the lipid and carbohydrate contents in microalgae Pancha et al, 2015a;Chokshi et al, 2015). However, these stress conditions resulted in lower growth rate and biomass productivity, which ultimately increase the biofuel production cost.…”

Stress responses of the oil-producing green microalgaBotryococcus brauniiRace B

“…ROS production has been reported in plants and algae after treatment with several common stress inducers such as NaCl (Rao et al, 2007; Yilancioglu et al, 2014; Pancha et al, 2015), NaHCO 3 (Gao et al, 2014), salicylic acid (SA) (Dorey et al, 1997; Gil et al, 2005), methyl jasmonate (MeJA) (Küpper et al, 2009), and acetic acid (Zuo et al, 2012a). We used the same inducers to examine if B. braunii cells were able to respond to these stresses in a similar manner.…”