Results 91 to 100 of about 22,348,680 (250)

A demonstration of energy transfer from photosystem II to photosystem I in chloroplasts

open access: yes, 1976
Photosystem I activity of Tris-washed chloroplasts was measured at room temperature as the rate of photoreduction of NADP and as the rate of oxygen uptake mediated by methyl viologen in both cases using dichlorophenolindophenol plus ascorbate as the ...
Butler, Warren L.   +2 more
core   +1 more source

DnaK1‐mediated regulation of phototactic motility in Synechococcus elongatus UTEX 3055

open access: yesmLife, EarlyView.
Abstract Cyanobacterial phototaxis relies on type IV pili (T4P); yet, how light signals are transmitted to the T4P motor remains unresolved. Here, we identify the molecular chaperone DnaK1 as an important regulator of phototactic motility in Synechococcus elongatus UTEX 3055.
Shang‐Yu Li   +9 more
wiley   +1 more source

Quality control of Photosystem II: the mechanisms for avoidance and tolerance of light and heat stresses are closely linked to membrane fluidity of the thylakoids

open access: yesFrontiers in Plant Science, 2016
When oxygenic photosynthetic organisms are exposed to excessive light and/or heat, Photosystem II is damaged and electron transport is blocked. In these events, reactive oxygen species, endogenous radicals and lipid peroxidation products generated by ...
Yasusi Yamamoto
doaj   +1 more source

Quantification of Photosystem Reaction Centers [PDF]

open access: yes, 2009
酸素発生型光合成生物がもつ2種の光化学系(光化学系Iと光化学系II)の量比は,光などの環境条件により適応的に制御される.本章では光化学反応中心の定量法について紹介する.Stoichiometric relationships of photosystem II, cytochrome b6-f and photosystem I complexes are regulated by growth conditions such as light intensity and light quality ...
村上, 明男
core  

Leaf heat tolerance in a native Californian shrub responds in expected and unexpected ways to differences in range, season, and sunlight exposure

open access: yesPLANTS, PEOPLE, PLANET, EarlyView.
Earth's ecosystems are experiencing wide‐ranging impacts from global climate change, including increased average and extreme temperatures. These temperature shifts can drastically affect plant physiology, threatening the future of even common plant species. Here, we focus on photosynthetic function in a native Southern California shrub species.
Anna K. M. Bowen   +8 more
wiley   +1 more source

Moderate photoinhibition of photosystem II protects photosystem I from photodamage at chilling stress in tobacco leaves

open access: yesFrontiers in Plant Science, 2016
It has been indicated that photosystem I (PSI) is susceptible to chilling-light stress in tobacco leaves, but the effect of growth light intensity on chilling-induced PSI photoinhibition in tobacco is unclear.
Wei eHuang   +3 more
doaj   +1 more source

Plant responses to iron nutrition with emphasis on the underutilized crop tef (Eragrostis tef): A review

open access: yesPLANTS, PEOPLE, PLANET, EarlyView.
Iron (Fe) deficiency limits the physical health, cognitive development, and economic output of billions of people globally, especially children and productive‐age women. Tef is an underutilized and stress‐resilient crop, which is becoming popular for its grains containing high bioavailable Fe and has the potential to mitigate Fe deficiency.
Muhammad Numan   +2 more
wiley   +1 more source

Synergistic benefits of agrivoltaics for grape production and solar energy efficiency in a Mediterranean vineyard

open access: yesPLANTS, PEOPLE, PLANET, EarlyView.
Grapevine production is increasingly challenged by global warming, with global wine output falling to a six‐decade low in 2024. At the same time, the vine and wine sector faces growing pressure to reduce its carbon footprint. Agrivoltaics, which integrates solar photovoltaic (PV) modules into plant production systems, offers a potential pathway to ...
Sabine Tausz‐Posch   +5 more
wiley   +1 more source

Acyl lipids in the supramolecular chlorophyll-protein complexes of photosystems - isolation artifacts or integral components regulating their structure and functions?

open access: yesActa Societatis Botanicorum Poloniae, 2014
The precise nature of interactions between the chloropnyll-protein complexes related to photosystem I or photosystem II and the acyl lipids in the thylakoid membranes is not yet fully elucidated.
Zbigniew Krupa
doaj   +1 more source

Structure and functional role of supercomplexes of IsiA and Photosystem I in cyanobacterial photosynthesis [PDF]

open access: yes, 2005
Cyanobacteria express large quantities of the iron stress-inducible protein IsiA under iron deficiency. IsiA can assemble into numerous types of single or double rings surrounding Photosystem I.
Haene, Sandrine D'   +17 more
core   +1 more source

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