Effect of Different Light Qualities on Growth, Pigment Content, Chlorophyll Fluorescence, and Antioxidant Enzyme Activity in the Red AlgaPyropia haitanensis(Bangiales, Rhodophyta)

Abstract

Spectral light changes evoke different morphogenetic and photosynthetic responses that can vary among different algae species. The aim of this study is to investigate the photosynthetic characteristics of the red macroalgae grown under different spectrum environments. In this study, Pyropia haitanensis were cultured under blue, red, and green LED and fluorescent tubes light. The growth rate, photopigment composition, chlorophyll fluorescence, and antioxidative enzymes activities in different light spectrums were investigated. The results revealed that growth rate was significantly higher in the thalli grown under blue, green, and fluorescent tubes light. Contents of Chl a and phycobiliprotein in red light were lower among all the growth conditions. Furthermore, a striking increase in SOD and CAT activity was observed in red light treatment along with the NPQ increase. The results revealed that the photosynthetic efficiency and increased growth rate of P. haitanensis benefitted from light spectrums such as blue, green, and fluorescent tubes light by pigment composition and photochemical efficiency manipulation, whereas red light has disadvantageous effects. Accordingly, the results for improving quality and the economic yield of algae species in some extent and the combination of different wavelengths could allow better economic resource exploitation.

First approach of characterization of bioactive compound in Pyropia orbicularis during the daily tidal cycle

“…However, there were no significant differences in the antioxidant activities observed from the n-hexane extracts under the ND and NH treatments suggesting that the lutein content would not be affected by this factor. This is in accordance with previous studies (Wu, 2016) where, for example, there was no differences in the modulation of the carotenoid levels in Pyropia haitanensis cultivated under different light intensities, despite observing differences in the concentration of other photosynthetic pigments such as chlorophyll-a, phycoerythrin and phycocyanin.…”

Depth influence on biochemical performance and thallus size of the red alga Gelidium corneum

“…Sunlight is the essential source of energy for primary producers and its quality and intensity play an important role in regulating the processes of photosynthesis and growth (Hanelt & Figueroa, 2012;Wu, 2016). Given that the nature of light is highly variable over multiple timescales, algae often receive more light than they can use for photosynthesis (Hanelt, Wiencke, & Bischof, 2003).…”

“…As a result, photoacclimation of macrophytes to high irradiance levels typically involves high antioxidant activities and increases in photoprotective compounds such as carotenoids (Celis-Plá et al, 2016;Ji et al, 2016). These latter pigments play an essential role in photoprotection due to their ability to quench ROS (Ramlov et al, 2011;Wu, 2016) and dissipate excess energy as heat (Wiencke & Bischof, 2012). tensities can result from photodamage to antioxidant machinery (Aguilera, Bischof, Karsten, Hanelt, & Wiencke, 2002;Foyer & Mullineaux, 1994).…”

“…This has been referred to as the 'brightening period' (Wild, 2009), and has been associated with reduced anthropogenic emissions of aerosol precursors and reductions in total cloud cover (Mateos et al, 2014). As light controls multiple processes in algae (Tait, Hawes, & Schiel, 2014;Wu, 2016), this global brightening is expected to be involved in recent and future changes in productivity and algae distributions (Tanaka, Kanno, & Shinohara, 2014). In this sense, these last authors suggested that the rise in global surface solar radiation may have been involved in the increased average annual primary production in Ise Bay (Japan).…”

“…Under radiation stress, the accumulation of reactive oxygen species (ROS) and photosynthetic pigment conentrations are used to determine the biochemical performance of macroalgae (Celis-Plá et al, 2016;Figueroa, Domínguez-González, & Korbee, 2014a;Stengel et al, 2014). Increasing irradiance levels enhance the production and accumulation of ROS, which leads to a subsequent increase in antioxidant activity (Celis-Plá et al, 2016;Ji, Xu, Zou, & Gao, 2016) and in photoprotective compounds such as carotenoids (Ramlov et al, 2011;Wu, 2016). The increase in antioxidant activity is thus interpreted as an increase in environmental stress caused by changes in the factors controlling photosynthesis such as excess light (Figueroa et al, 2014b).…”