Salinity restricts light conversion efficiency during photo-acclimation to high irradiance in Stuckenia pectinata

Hu, Qian; Turnbull, Matthew H.; Hawes, Ian

doi:10.1016/j.envexpbot.2019.05.022

Cited by 1 publication

(5 citation statements)

References 30 publications

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“…This result is in line with a previous study focusing on Zostera marina (L) responses to light stress applied within controlled laboratory conditions [60]. Hu et al [26] also noticed that HS and HI reduced (p < 0.001) the Chl a content in S. pectinata, in agreement with the results of this study, where Chl a content at HI and HS was lower (p < 0.01) than HI and MS.…”

Section: Interactive Effects Between Irradiance and Salinitysupporting

confidence: 93%

“…The great range of tolerance of S. pectinata to salinity (9-18) has been reported by other studies [3,23,24]. Hu et al [26] also reported that PSII units and electron flow were not influenced under salinity stress.…”

Section: Interactive Effects With Timementioning

confidence: 60%

“…HI was also observed to reduce the maximum quantum yield in other plants [53,54]. Hu et al [26] also showed that HI induced the decrease in effective quantum yield of PSII in S. pectinata. In agreement, TR 0 /RC represents the maximal rate by which an exciton is trapped by the RC, resulting in the reduction of Q A − [55], which remained unaffected with all the treatments (Figure 2A).…”

Section: Irradiance Effectsmentioning

confidence: 91%

“…The results reveal that Chl a and Chl b content in S. pectinata increased significantly (p < 0.01) under HI and low salinity (Figure 5, Table S2), inconsistent with the general trend. Hu et al [26] and Pilon and Santamaría [1] showed that the total chlorophyll concentration of S. pectinata was higher at low irradiance, which resulted in higher photosynthetic performance. Obviously, the HI condition used in this study was not too high to make the plants unable to produce more chlorophyll.…”

Section: Interactive Effects Between Irradiance and Salinitymentioning

confidence: 98%

“…In a recent study, Hu et al [26] indicated that salinity 12 and 18 restricted light conversion efficiency at high irradiance (340 µmol photons m −2 s −1 ), and reduced chlorophyll a (Chl a) content, while increasing heat dissipation in S. pectinata. However, there is limited information regarding the effects of high irradiance on the growth and photosynthesis of S. pectinata, especially under fluctuating salinity conditions.…”

Section: Introductionmentioning

confidence: 99%

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Physiological Responses of the Submerged Macrophyte Stuckenia pectinata to High Salinity and Irradiance Stress to Assess Eutrophication Management and Climatic Effects: An Integrative Approach

Malea

Nakou

Papadimitriou

et al. 2021

Water

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Stuckenia pectinata, a submerged macrophyte of eutrophic to hyper-eutrophic fresh to brackish waters, faces management and climatic-forced increment of salinity and irradiance in Vistonis Lake (Greece) that may endanger its existence and the ecosystem functioning. A pre-acclimated clone under low irradiance and salinity conditions was treated to understand the effects of high salinity and irradiance on a suite of subcellular (chlorophyll a fluorescence kinetics and JIP-test, and chlorophyll content) to organismal (relative growth rate—RGR) physiological parameters. The responses to high irradiance indicated the plant’s great photo-acclimation potential to regulate the number and size of the reaction centers and the photosynthetic electron transport chain by dissipation of the excess energy to heat. A statistically significant interaction (p < 0.01) of salinity and irradiance on Chl a, b content indicated acclimation potential through adjusting the Chl a, b contents. However, no significant (p > 0.05) difference was observed on Chl a/b ratio and the RGR, indicating the species’ potential to become acclimatized by reallocating resources to compensate for growth. Thus, the regulation of photosynthetic pigment content and photosystem II performance consisted of the primary growth strategy to present and future high salinity and irradiance stressful conditions due to eutrophication management and the ongoing climatic changes.

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Section: Interactive Effects Between Irradiance and Salinitysupporting

confidence: 93%