Results 41 to 50 of about 8,567 (253)

Multimode collective scattering of light in free space by a cold atomic gas [PDF]

Phys. Rev. A 100, 023630 (2019), 2019
We have studied collective recoil lasing by a cold atomic gas, scattering photons from an incident laser into many radiation modes in free space. The model consists of a system of classical equations for the atomic motion of N atoms, where the radiation field has been adiabatically eliminated.
arxiv   +1 more source

Phenotypic landscape inference reveals multiple evolutionary paths to C$_4$ photosynthesis [PDF]

, 2013
C$_4$ photosynthesis has independently evolved from the ancestral C$_3$ pathway in at least 60 plant lineages, but, as with other complex traits, how it evolved is unclear.
Abramoff, Adams, Akyildiz, Aubry, Beebe, Brown, Brown, Bruhl, Bustin, Casati, Cheng, Christin, Christin, Christin, Christin, Christin, Devi, Devi, Edwards, Furbank, Gavrilets, Goldstein, Gowik, Griffiths, Hatch, Hattersley, Hattersley, Heckman, Hibberd, Hill, Holaday, Holaday, Holaday, Hylton, Johnson, Kajala, Keeley, Kennedy, Khoshravesh, Kidwell, Koteyeva, Kozmik, Ku, Ku, Ku, Ku, Langdale, Livak, Lobkovsky, McKown, McKown, Mooers, Moore, Muhaidat, Osborne, P’yankov, Rabiner, Rajendrudu, Rathnam, Rathnam, Rawsthorne, Rawsthorne, Revuz, Rosche, Roweis, Sage, Sage, Sage, Santos, Sayre, Slack, Smith, Steiner, Ueno, Ueno, Vicentini, Vogan, Voznesenskaya, Voznesenskaya, Voznesenskaya, Wasserman, Weinreich, Whibley, Williams, Wilson, Wiludda, Wittkopp, Wright, Zhu   +88 more
core   +3 more sources

Intestinal gluconeogenesis and glucose transport according to body fuel availability in rats [PDF]

J Physiol 566 (15/07/2005) 575-86, 2007
Intestinal hexose absorption and gluconeogenesis have been studied in relation to refeeding after two different fasting phases: a long period of protein sparing during which energy expenditure is derived from lipid oxidation (phase II), and a later phase characterized by a rise in plasma corticosterone triggering protein catabolism (phase III).
arxiv   +1 more source

Morpho-physiological and molecular responses of two Libyan bread wheat cultivars to plant growth regulators under salt stress

Italian Journal of Agronomy, 2020
To study the effects of salt stress and plant growth regulators (kinetin, gibberellic acid, potassium) on growth, yield, glycine betaine content, phosphoenolpyruvate carboxylase (PEPC) and ribulose biphosphate carboxylase (RBC) gene expression of two ...
El Hadi Hadia, Amor Slama, Leila Romdhane, Hatem Cheikh M’hamed, Ahmed Houssein Abodoma, Mohamed Ali Saed Fahej, Leila Radhouane   +6 more
doaj   +1 more source

Phosphoenolpyruvate carboxylase and phosphoenolpyruvate carboxylase kinase isoenzymes play an important role in the filling and quality of Arabidopsis thaliana seed [PDF]

, 2022
Three plant-type phosphoenolpyruvate carboxylase (PPC1 to PPC3) and two phosphoenolpyruvate carboxylase kinase (PPCKs: PPCK1 and 2) genes are present in the Arabidopsis thaliana genome. In seeds, all PPC genes were found to be expressed.
Baena Vaca, Guillermo, Echevarría Ruiz de Vargas, Cristina, Feria Bourrellier, Ana Belén, Ruiz Ballesta, Isabel, Ruiz López, Noemi, Vidal, Jean   +5 more
core   +1 more source

Kinetic Modifications of C4 PEPC Are Qualitatively Convergent, but Larger in Panicum Than in Flaveria

Frontiers in Plant Science, 2020
C4 photosynthesis results from a set of anatomical features and biochemical components that act together to concentrate CO2 within the leaf and boost productivity.
Nicholas R. Moody, Pascal-Antoine Christin, James D. Reid   +2 more
doaj   +1 more source

Fast dehydration reduces bundle sheath conductance in C₄ maize and sorghum. [PDF]

New Phytol
Summary In the face of anthropogenic warming, drought poses an escalating threat to food production. C4 plants offer promise in addressing this threat. C4 leaves operate a biochemical CO2 concentrating mechanism that exchanges metabolites between two partially isolated compartments (mesophyll and bundle sheath), which confers high‐productivity ...
Bellasio C, Stuart-Williams H, Farquhar GD, Flexas J.   +3 more
europepmc   +2 more sources

Hydroponic culturing upregulates sucrose and glutamine metabolism by enhancing their utilization via intermediates of aerobic pathway in wheat [PDF]

, 2016
Two wheat genotypes were grown in hydroponic culture, containing 4 mM KNO3, NH4Cl and NH4NO3. Activities of N metabolizing enzymes, aminotransferases, carbohydrate and TCA cycle enzymes were analyzed along with protein, amino acid, N, sugar content and ...
Asthir, B., Kaur, B.
core   +1 more source

Rubisco function, evolution, and engineering [PDF]

arXiv, 2022
Carbon fixation is the process by which CO2 is converted from a gas into biomass. The Calvin Benson Bassham (CBB) cycle is the dominant carbon fixation pathway on earth, driving >99.5% of the ~120 billion tons of carbon that are "fixed" as sugar, by plants, algae and cyanobacteria.
arxiv  

PEPC of sugarcane regulated glutathione S-transferase and altered carbon–nitrogen metabolism under different N source concentrations in Oryza sativa

BMC Plant Biology, 2021
Background Phosphoenolpyruvate carboxylase (PEPC) plays an important role in the primary metabolism of higher plants. Several studies have revealed the critical importance of PEPC in the interaction of carbon and nitrogen metabolism.
Ling Lian, Yuelong Lin, Yidong Wei, Wei He, Qiuhua Cai, Wei Huang, Yanmei Zheng, Huibin Xu, Fuxiang Wang, Yongsheng Zhu, Xi Luo, Huaan Xie, Jianfu Zhang   +12 more
doaj   +1 more source