Results 71 to 80 of about 2,338 (183)

Evidence for a CO2‐concentrating mechanism in the model streptophyte green alga Chara braunii

open access: yesNew Phytologist, Volume 247, Issue 3, Page 1218-1233, August 2025.
Summary Oxygenic photosynthesis in streptophytic algae, such as Charophyceae, is often impeded by low CO2 levels in aquatic habitats. Consequently, many algal groups evolved a CO2‐concentrating mechanism (CCM). However, its presence in Charophyceae remains controversial.
Carolin M. Heise   +6 more
wiley   +1 more source

Cloning and expression analysis of Rubisco activase genes in Carya cathayensis

open access: yesBiotechnology & Biotechnological Equipment, 2016
Ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) is a key enzyme involved in CO2 assimilation during photosynthesis. Rubisco activation depends on the activity of Rubisco activase (RCA). We performed 3′/5′ rapid amplification of cDNA ends (RACE)
Guo Cun Ji   +4 more
doaj   +1 more source

Stromal protein degradation is incomplete in Arabidopsis thaliana autophagy mutants undergoing natural senescence

open access: yesBMC Research Notes, 2013
Background Degradation of highly abundant stromal proteins plays an important role in the nitrogen economy of the plant during senescence. Lines of evidence supporting proteolysis within the chloroplast and outside the chloroplast have been reported. Two
Lee Travis A   +2 more
doaj   +1 more source

Purification and Assay of Rubisco Activase from Leaves

open access: yesPlant Physiology, 1988
Ribulose 1,5-bisphosphate carboxylase/oxygenase (rubisco) activase protein was purified from spinach leaves by ammonium sulfate precipitation and ion exchange fast protein liquid chromatography. This resulted in 48-fold purification with 70% recovery of activity and yielded up to 18 milligrams of rubisco activase protein from 100 grams of leaves. Based
Simon P. Robinson   +3 more
openaire   +4 more sources

Coordinate Expression of Rubisco Activase and Rubisco during Barley Leaf Cell Development [PDF]

open access: yesPlant Physiology, 1989
We have utilized the cellular differentiation gradient and photomorphogenic responses of the first leaf of 7-day-old barley (Hordeum vulgare L.) to examine the accumulation of mRNA and protein encoded by the ribulose-1,5-biphosphate carboxylase holoenzyme (rubisco) activase gene (rca).
Jeffrey M. Werneke   +2 more
openaire   +3 more sources

Plastomic studies inform the mechanisms of edaphic adaptation in North American species in the tribe Thelypodieae (Brassicaceae)

open access: yesAmerican Journal of Botany, Volume 112, Issue 7, July 2025.
Abstract Premise Adaptation to edaphic environments is vital for plant survival. The tribe Thelypodieae (Brassicaceae) thrives in diverse edaphic conditions, including harsh serpentine soils. A robust phylogeny is essential to understanding the edaphic evolution in this tribe but is challenging to obtain due to incomplete lineage sorting, hybridization,
Kasuni C. Daundasekara   +2 more
wiley   +1 more source

Metabolic modeling identifies determinants of thermal growth responses in Arabidopsis thaliana

open access: yesNew Phytologist, Volume 247, Issue 1, Page 178-190, July 2025.
Summary Temperature is a critical environmental factor affecting nearly all plant processes, including growth, development, and yield. Yet, despite decades of research, we lack the ability to predict plant performance at different temperatures, limiting the development of climate‐resilient crops.
Philipp Wendering   +3 more
wiley   +1 more source

TGase positively regulates photosynthesis via activation of Calvin cycle enzymes in tomato

open access: yesHorticulture Research, 2019
Transglutaminases (TGases), which are widespread cross-linking enzymes in plants, play key roles in photosynthesis and abiotic/biotic stress responses; however, evidence concerning the genetics underlying how TGase improves the capability of ...
Min Zhong   +5 more
doaj   +1 more source

Rubisco activation by wheat Rubisco activase isoform 2β is insensitive to inhibition by ADP [PDF]

open access: yesBiochemical Journal, 2019
Abstract Rubisco activase (Rca) is a catalytic chaperone that remodels the active site, promotes the release of inhibitors and restores catalytic competence to Rubisco. Rca activity and its consequent effect on Rubisco activation and photosynthesis are modulated by changes to the chloroplast environment induced by fluctuations in light ...
Gustaf E. Degen   +4 more
openaire   +3 more sources

Effect of Ulva lactuca Aqueous Extract on Growth, Minerals, Chlorophyll Content, Rubisco Activity and Rubisco Activase in Zea mays Seedlings

open access: yesJournal of Pure and Applied Microbiology, 2018
The present study aimed to investigate the biological effects of different concentrations of Ulva lactuca aqueous extract (ULAE) on the growth parameters and biochemical characteristics of Zea mays.
Amani Abdel-Latif   +3 more
doaj   +1 more source

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