LETTER TO EDITORLight regulation of photosynthetic light harvesting doubles the biomass yield in the green alga Chlamydomonas

Sayre, Richard T.; Negi, Sangeeta; Govindjee, G.

doi:10.32615/ps.2020.049

Cited by 5 publications

(1 citation statement)

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“…Conversely, the observed ABS/RC values indicate a smaller PSII antenna size in Lomello compared to that in C57‐5043 under both control and stress conditions (Figures 6; S7‐S9). This could give Lomello an advantage in reducing oxidative damage and maintaining higher photosynthesis due to less prone photosynthesis machinery (Sayre et al, 2020). Further, parameters characterizing the energy flux related to the electron transport from the reduced Q A (Q A − ) to the PQ pool (i.e., ETo/RC, ETo/ABS, and ETo/TRo) were substantially higher in Lomello across all the stress treatments.…”

Section: Discussionmentioning

confidence: 99%

Impact of individual, combined and sequential stress on photosynthesis machinery in rice (Oryza sativa L)

Anwar,

Joshi,

Bahuguna

et al. 2024

Physiologia Plantarum

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Abiotic stresses such as heat, drought and submergence are major threats to global food security. Despite simultaneous or sequential occurrence of these stresses being recurrent under field conditions, crop response to such stress combinations is poorly understood. Rice is a staple food crop for the majority of human beings. Exploitation of existing genetic diversity in rice for combined and/or sequential stress is a useful approach for developing climate‐resilient cultivars. We phenotyped ~400 rice accessions under high temperature, drought, or submergence and their combinations. A cumulative performance index revealed Lomello as the best performer across stress and stress combinations at the seedling stage. Lomello showed a remarkable ability to maintain a higher quantum yield of photosystem (PS) II photochemistry. Moreover, the structural integrity of the photosystems, electron flow through both PSI and PSII and the ability to protect photosystems against photoinhibition were identified as the key traits of Lomello across the stress environments. A higher membrane stability and an increased amount of leaf chlorophyll under stress may be due to an efficient management of reactive oxygen species (ROS) at the cellular level. Further, an efficient electron flow through the photosystems and, thus, a higher photosynthetic rate in Lomello is expected to act as a sink for ROS by reducing the rate of electron transport to the high amount of molecular oxygen present in the chloroplast. However, further studies are needed to identify the molecular mechanism(s) involved in the stability of photosynthetic machinery and stress management in Lomello during stress conditions.

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Section: Discussionmentioning

confidence: 99%