Abiotic stress in algae: response, signaling and transgenic approaches

Kaur, Manpreet; Saini, Khem Chand; Ojah, Hiramoni; Sahoo, Rajalakshmi; Gupta, Kshitiz; Kumar, Anil; Bast, Felix

doi:10.1007/s10811-022-02746-7

Cited by 51 publications

(14 citation statements)

References 269 publications

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“…Several cellular mechanisms are involved into the response of algae to abiotic stress. They comprise a wide range of physiological and biochemical responses including K + transport and signalling, and phytohormones activity (for review see Kaur et al 2022). For salinity stress in freshwater microalgae, accumulation and excrettion of glycerol is reported (León and Galván 1994).…”

Section: Introductionmentioning

confidence: 99%

Species-specific responses of Antarctic terrestrial microalgae to salinity stress. Comparative study in Klebsormidium sp. and Stigeoclonium sp.

Canora¹,

Llorens²,

Sicilia³

2022

Czech Polar Rep.

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We studied the changes in PSII photochemical processes in the cells of Antarctic algae Klebsormidium sp. and Stigeoclonium sp. exposed to salinity stress (0 – 3M NaCl) for 3 h. Salinity stress induced a decrease in the potential (FV/FM) and effective quantum yield of PSII electron transport (FPSII). Salinity stress induced a decrease in vitality index (Rfd, relative decrease of chlorophyll fluorescence). Analyses of the polyphasic fast chlorophyll fluorescence transients (OJIP) showed that with the increase in salt concentration, the chlorophyll fluorescence signals recorded at the phases J, I, and P declined, and the transient flattened with increaseing NaCl concentration reaching close to zero ChlF values at salt concentration of 3 M NaCl after 180 min. exposition. Klebsormidium sp. was found more salinity stress resistant than Stigeoclonium sp.

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Section: Introductionmentioning

confidence: 99%

Species-specific responses of Antarctic terrestrial microalgae to salinity stress. Comparative study in Klebsormidium sp. and Stigeoclonium sp.

Canora¹,

Llorens²,

Sicilia³

2022

Czech Polar Rep.

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“…Light conditions affect algal growth mainly through its impact on photosynthesis. The algal growth rate is maximal at saturating irradiances for photosynthesis and decreases with both rising and declining PFDs (Kaur et al, 2022).…”

Section: Discussionmentioning

confidence: 99%

“…Thus, an increase in harmful solar radiation on the Earth's surface is documented due to the depletion of the stratospheric ozone layer (Thomas et al, 2012). Enhanced solar radiation on coastal ecosystems can trigger several detrimental effects on photosynthetic organisms, for example, DNA alterations, biosynthesis of reactive oxygen species (ROS), photoinhibition, degradation of photosynthetic pigments, and changes in the ultrastructure of cells, such as, increased thickness of cell wall, reduced intracellular spaces, and destruction of chloroplast internal organization ( Van de Poll et al, 2001;Schmidt et al, 2012;Kaur et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Photosynthetic performance, growth, pigment content, and photoprotective compounds of the mangrove macroalgae Bostrychia calliptera and Bostrychia montagnei (Rhodophyta) under light stress

Borburema

Graiff²,

Marinho‐Soriano³

et al. 2022

Front. Mar. Sci.

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Increased solar radiation on the Earth’s surface is expected due to global change. Mangrove macroalgae can be negatively affected by increased solar radiation, since some species, such as Bostrychia spp. have been characterized as typical “shade” plants. Thus, we investigated the effects of increasing photon flux densities (PFDs: 170, 267, 443, 638, and 1155 µmol photons m–2 s–1) on the physiological performance of Bostrychia calliptera and Bostrychia montagnei from a tropical mangrove. Several photosynthesis–related parameters indicated that both species decreased their photosynthetic performance under increasing PFDs, with photosynthesis of B. montagnei being more affected than that of B. calliptera. Bostrychia calliptera exhibited highest growth under 638 µmol photons m–2 s–1 while at 1155 µmol photons m–2 s–1 it was inhibited. The highest growth of Bostrychia montagnei was observed under 267 µmol photons m–2 s–1. Higher PFDs led to growth inhibition. The phycobiliprotein and chlorophyll a content of B. montagnei was degraded under increased PFDs. In B. calliptera only chlorophyll a degradation was observed. The mycosporine-like amino acid contents (photoprotective metabolites) of both species were degraded under increasing PFDs, which was more pronounced in B. montagnei. Our results demonstrated that increased solar radiation on estuarine tropical ecosystems will be detrimental to the physiological performance of B. calliptera and B. montagnei. Our results also demonstrated that B. montagnei was more negatively affected by increased light stress than B. calliptera. This can explain its preferential occurrence in more shaded microhabitats compared to B. calliptera. Our data document for the first time light acclimation in the studied macroalgae and the deleterious effects of increased light stress on the genus Bostrychia.

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“…Plant hormones play a positive regulatory role by reducing oxidative stress. Exogenous phytohormones in combination with abiotic stress conditions can simultaneously increase the biomass of microalgae, the production of energy storage materials, and the ability of algae to tolerate abiotic stress (Kaur et al 2022). Furthermore, there are numerous studies available on microalgal phytohormones, but they mainly focus on phytohormone detection methods and their roles in algal cells.…”

Section: Prospectsmentioning

confidence: 99%

Exploration of the phytohormone regulation of energy storage compound accumulation in microalgae

Saud

Jiang

et al. 2022

Food and Energy Security

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Microalgal energy storage compounds (carbohydrates, lipids, etc.) can serve as renewable feedstocks for biofuels and biobased chemicals. Traditional methods of inducing the accumulation of energy storage compounds in microalgae, such as abiotic stress (high light intensity, high salinity, nutrient limitation, heavy metals, etc.), can affect the growth of microalgae and limit their efficient accumulation of energy storage materials. Plant hormones are a class of small molecular substances that act as chemical messengers to coordinate plant cell activities and regulate the physiological and metabolic activities of microalgae, including promoting microalgal cell proliferation, improving stress resistance, and enhancing photosynthetic activity, thereby increasing algal biomass and lipid, chlorophyll and protein content. This paper reviews the recent research progress on regulation of the accumulation of energy storage compounds in microalgae by adding exogenous plant hormones combined with abiotic stress, discusses the mechanism of plant hormones regarding the accumulation of energy storage compounds in microalgae, and proposes future research needs.

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Abiotic stress in algae: response, signaling and transgenic approaches

Cited by 51 publications

References 269 publications

Species-specific responses of Antarctic terrestrial microalgae to salinity stress. Comparative study in Klebsormidium sp. and Stigeoclonium sp.

Species-specific responses of Antarctic terrestrial microalgae to salinity stress. Comparative study in Klebsormidium sp. and Stigeoclonium sp.

Photosynthetic performance, growth, pigment content, and photoprotective compounds of the mangrove macroalgae Bostrychia calliptera and Bostrychia montagnei (Rhodophyta) under light stress

Exploration of the phytohormone regulation of energy storage compound accumulation in microalgae

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