Light intensity dependent photosynthetic electron transport in eelgrass (Zostera marina L.)

Yang, Xiao; Zhang, Quan Sheng; Zhang, Di; Sheng, Zi Tong

doi:10.1016/j.plaphy.2017.02.011

Cited by 31 publications

(24 citation statements)

References 38 publications

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“…Because continuously impaired OEC led to a relatively oxidized PQ pool (Makarova et al, 2007), the PGR5-dependent PSI-CEF in Z. marina was activated to supplement the PSI linear electron transport. Activated PSI-CEF revealed by proteome data in the present study was in agreement with chlorophyll fluorescence physiological phenotype observed in our previous study (Yang et al, 2017). The interactions between PsbO and HCF244, as well as PGR5 and PsaN indicated the potential of the partially impaired OEC to enhance PSII repair and activate the PGR5-dependent PSI-CEF.…”

Section: Discussionsupporting

confidence: 92%

“…Accordingly, Z. marina would possess more susceptible OEC with absorption peaks ranging between UV and blue-green light wavelengths (Tyystjärvi, 2008), providing the condition for the occurrence of PSII donor-side photoinhibition. Our recent study (Yang et al, 2017) showed that: (1) photoinhibition of Z. marinaalso occurred in low light conditions; (2) photoinhibition is closely relevant to the inactivation of OEC described by delayed fluorescence (DF); (3) the time-course changes ofF v /F m exhibited the deficiency of the P fast component of the Hanelt photoinhibition model, suggesting the slow NPQ development. These results agreed with the characteristics of PSII donor-side photoinhibition.…”

Section: Introductionmentioning

confidence: 99%

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Exclusive photosystem II photoinhibition derived from photoinactivation of oxygen-evolving complex in the marine angiosperm Zostera marina

Zhao¹,

Yang

Tan

et al. 2020

Preprint

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Photoinhibition is the popular topic in plant photosynthesis. However, restricted to experimental systems of in vitro membranes, knowledge of photosystem II (PSII) donor-side photoinhibition remains limited. Here, we report the first in vivo study of the mechanism in the marine higher plant Zostera marina. Preferential oxygen-evolving complex photoinactivation decreased the light-harvesting capacity and enhanced photosystem I cyclic electron flow (CEF). Non-photochemical quenching was inefficient and alternative electron flows, e.g. chlororespiration, Mehler reaction, malic acid synthesis, and photorespiration, remained unactivated, thereby reducing the unnecessary consumption of limited electron resources and maintaining a well carbon assimilation level. At variance with the PSII acceptor-side photoinhibition, the PSII photodamage of Z. marina was not attributed to 1 O 2 but was associated with the long-lived P680 + resulted from the photoinactivated OEC. Furthermore, we provided the novel insights into the PSII donor-side photoinhibition that rare PSII-CEF and ascorbate assumed photoprotective roles in Z. marina, which could donate electrons to the PSII reaction center to prevent the oxidative damage by P680 +. This study addressed an important knowledge gap in PSII donor-side photoinhibition, providing a novel understanding of photosynthetic regulation mechanism responding to light stress.

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Section: Discussionsupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Exclusive photosystem II photoinhibition derived from photoinactivation of oxygen-evolving complex in the marine angiosperm Zostera marina

Zhao¹,

Yang

Tan

et al. 2020

Preprint

Self Cite

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“…Eelgrass has been extensively studied to understand the plant physiology particularly under aquatic and high saline condition ( Yu, 2015 ; Yang et al, 2017 ). However, very limited attention was paid to study the involvement of AQPs in physiological processes.…”

Section: Discussionmentioning

confidence: 99%

Understanding Aquaporin Transport System in Eelgrass (Zostera marina L.), an Aquatic Plant Species

et al. 2017

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Aquaporins (AQPs) are a class of integral membrane proteins involved in the transport of water and many other small solutes. The AQPs have been extensively studied in many land species obtaining water and nutrients from the soil, but their distribution and evolution have never been investigated in aquatic plant species, where solute assimilation is mostly through the leaves. In this regard, identification of AQPs in the genome of Zostera marina L. (eelgrass), an aquatic ecological model species could reveal important differences underlying solute uptake between land and aquatic species. In the present study, genome-wide analysis led to the identification of 25 AQPs belonging to four subfamilies, plasma membrane intrinsic proteins (PIPs), tonoplast intrinsic proteins (TIPs), nodulin 26-like intrinsic proteins (NIPs), small basic intrinsic proteins (SIPs) in eelgrass. As in other monocots, the XIP subfamily was found to be absent from the eelgrass genome. Further classification of subfamilies revealed a unique distribution pattern, namely the loss of the NIP2 (NIP-III) subgroup, which is known for silicon (Si) transport activity and ubiquitously present in monocot species. This finding has great importance, since the eelgrass population stability in natural niche is reported to be associated with Si concentrations in water. In addition, analysis of available RNA-seq data showed evidence of expression in 24 out of the 25 AQPs across four different tissues such as root, vegetative tissue, male flower and female flower. In contrast to land plants, higher expression of PIPs was observed in shoot compared to root tissues. This is likely explained by the unique plant architecture of eelgrass where most of the nutrients and water are absorbed by shoot rather than root tissues. Similarly, higher expression of the TIP1 and TIP5 families was observed specifically in male flowers suggesting a role in pollen maturation. This genome-wide analysis of AQP distribution, evolution and expression dynamics can find relevance in understanding the adaptation of aquatic and land species to their respective environments.

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“…Chlorophyll (Chl) a fluorescence is extensively utilized for detecting the plant health status and the influences of environmental stress effects on photosynthetic performance (Kalaji et al 2011(Kalaji et al , 2014Brestič et al 2012Brestič et al , 2014Yang et al 2017). The JIP-test, a method extracting information from the Chl fluorescence transients, appeared to be fast, noninvasive, sensitive, and powerful approach for assessment of photosynthetic electron transport and related photosynthetic processes (Strasser and Strasser 1995, Strasser et al 2004.…”

Section: Introductionmentioning

confidence: 99%

Special issue in honour of Prof. Reto J. Strasser - JIP-test as a tool for early diagnostics of plant growth and flowering upon selected light recipe

Zhiponova¹,

Paunov²,

Anev³

et al. 2020

Photosynt.

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Light is a major factor controlling plant growth and development. To assess the impact of the applied light conditions, we aimed to sort out a tool for early diagnostics of the plant physiological state. We investigated the effect of a blue:red:far-red LED light formula recommended for improved plant performance (flowering). High (BR) and low (BRS) light intensity variants were compared to normal (W) and 'shadowed' (WS) white fluorescent controls. The efficiency of the JIP-test to determine changes during early growth of pea plants was compared to additional physiological characteristics (growth parameters, thermal stability of the thylakoid membranes, chlorophyll content, CO2 assimilation, transpiration). Our data showed the onset of growth inhibition under BR light, while BRS light stimulated plants to reach the flowering stage similarly as the W control. We concluded that the JIP-test is appropriate for early, reliable, and nondestructive analysis of light recipes for plant growth and flowering.

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Light intensity dependent photosynthetic electron transport in eelgrass (Zostera marina L.)

Cited by 31 publications

References 38 publications

Exclusive photosystem II photoinhibition derived from photoinactivation of oxygen-evolving complex in the marine angiosperm Zostera marina

Exclusive photosystem II photoinhibition derived from photoinactivation of oxygen-evolving complex in the marine angiosperm Zostera marina

Understanding Aquaporin Transport System in Eelgrass (Zostera marina L.), an Aquatic Plant Species

Special issue in honour of Prof. Reto J. Strasser - JIP-test as a tool for early diagnostics of plant growth and flowering upon selected light recipe

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