Light harvesting in higher plants and green algae

Nicol, Lauren; Croce, Roberta; Grondelle, Rienk van; Amerongen, Herbert van; Stokkum, Ivo H. M. van

doi:10.1201/9781351242899-4

Cited by 2 publications

(1 citation statement)

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“…Excited electrons by light should be trapped by electron acceptors before turning down to the base status. The photosystem II (PSII) efficiency in the traping of the excited electron reflects the higher PSII capacity in transferring light to the electron transport chain [ 80 , 81 ]. Accordingly, the electron transport rate (ET0/RC) of PSII shows the oxidized quinone acceptor (Qa) as the energy consumer in the electron transport chain that protects photodamage [ 82 ].…”

Section: Discussionmentioning

confidence: 99%

Response to Cadmium Toxicity: Orchestration of Polyamines and microRNAs in Maize Plant

Hassani,

Latifi,

Aliniaeifard

et al. 2023

Plants

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Cadmium (Cd) is a heavy metal that is widely contaminating the environment due to its uses in industries as corrosive reagents, paints, batteries, etc. Cd can easily be absorbed through plant roots and may have serious negative impacts on plant growth. To investigate the mechanisms utilized by plants to cope with Cd toxicity, an experiment was conducted on maize seedlings. We observed that the plant growth and photosynthetic mechanism were negatively influenced during 20 days of Cd stress. The expression levels of ornithine decarboxylase (ORDC) increased in the six seedlings under Cd exposure compared to the control. However, Cd toxicity led to an increase in putrescine (Put) content only on day 15 when compared to the control plants. In fact, with the exception of day 15, the increases in the ORDC transcript levels did not show a direct correlation with the observed increases in Put content. Spermidine and Spermine levels were reduced on day 6 by Cd application, which was parallel with suppressed Spermidine synthase gene. However, an increase in Spermidine and Spermine levels was observed on day 12 along with a significant elevation in Spermidine synthase expression. On day 6, Cd was observed to start accumulating in the root with an increase in the expression of microRNA 528; while on day 15, Cd started to be observed in the shoot part with an increase in microRNA 390 and microRNA 168. These results imply that different miRNAs may regulate polyamines (PAs) in maize under Cd toxicity, suggesting a plant-derived strategy to commit a PAs/miRNA-regulated mechanism/s in different developmental stages (time points) in response to Cd exposure.

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Section: Discussionmentioning

confidence: 99%

Response to Cadmium Toxicity: Orchestration of Polyamines and microRNAs in Maize Plant

Hassani,

Latifi,

Aliniaeifard

et al. 2023

Plants

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Light harvesting in oxygenic photosynthesis: Structural biology meets spectroscopy

Croce

Amerongen

2020

Science

240

205

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Oxygenic photosynthesis is the main process that drives life on earth. It starts with the harvesting of solar photons that, after transformation into electronic excitations, lead to charge separation in the reaction centers of photosystems I and II (PSI and PSII). These photosystems are large, modular pigment-protein complexes that work in series to fuel the formation of carbohydrates, concomitantly producing molecular oxygen. Recent advances in cryo–electron microscopy have enabled the determination of PSI and PSII structures in complex with light-harvesting components called “supercomplexes” from different organisms at near-atomic resolution. Here, we review the structural and spectroscopic aspects of PSI and PSII from plants and algae that directly relate to their light-harvesting properties, with special attention paid to the pathways and efficiency of excitation energy transfer and the regulatory aspects.

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Light harvesting in higher plants and green algae

Cited by 2 publications

References 1 publication

Response to Cadmium Toxicity: Orchestration of Polyamines and microRNAs in Maize Plant

Response to Cadmium Toxicity: Orchestration of Polyamines and microRNAs in Maize Plant

Light harvesting in oxygenic photosynthesis: Structural biology meets spectroscopy

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