PAM fluorometry as a tool to assess microalgal nutrient stress and monitor cellular neutral lipids

Effect of light intensity on physiological changes, carbon allocation and neutral lipid accumulation in oleaginous microalgae

“…These results indicated a progressive reduction of their PSII activity in mounting light intensities especially in HL. The Fv/Fm value has been found to be relatively constant in nonstressed cultures, and to decrease in stressed cultures (White et al, 2011). Accordingly, on one hand, the declined Fv/Fm in this study may be largely attributed to the incident HL.…”

The Relationship of Triacylglycerol and Starch Accumulation to Carbon and Energy Flows During Nutrient Deprivation in Chlamydomonas.

“…In this version of the OH, following N deprivation cells experience stress from excess light energy uptake leading to the activation of energy dissipative mechanisms such as NPQ and/or the Mehler reaction in addition to TAG synthesis. Increases in NPQ under nutrient deprivation have been previously observed, reaching levels that account for a substantial proportion of light energy reaching the photosystems (White et al, 2011;Wilson et al, 2007;Allen et al, 2008;Antal et al, 2006). However, those measurements of NPQ were made under much higher light levels than those under which cultures were maintained.…”

Photosynthetic response to nitrogen source and different ratios of nitrogen and phosphorus in toxic cyanobacteria, Microcystis aeruginosa FACHB-905

“…rETR is a measure of the rate of linear electron transport through PSII, while E k defines the onset of light saturation as obtained from the curves (Juneau et al, 2005). φPSII and F v /F m are used to estimate nutrient limitation, which have been found to decrease in nutrient stressed cultures (Schreiber et al, 2002;White et al, 2011).…”