In tropical regions, high light levels can lead to increased photooxidative damage in plants. Thus, reducing solar radiation could have a substantial impact on crop performance. This study aimed evaluate the physiological responses and metabolic profile of two tomato varieties grown microenvironments modified with cover meshes under level warm climate. The experiment was achieved irradiance an ...

To explore the response of summer maize leaf senescence, photosynthetic characteristics, and yield to depth one-time base application controlled-release urea, which provides a theoretical basis for light simplified production maize. Seven treatments were set up with Zhengdan 958 as material under field conditions, including no nitrogen fertilizer (CK), surface spreading (DP0), furrow 5 cm (DP5)...

The fluorescence rise kinetics in saturating light display two well separated com ponents with largely different properties. The rapid rise from F„ to a first intermediate level, I ,, is photochemically controlled, while the following phases leading to a secondary intermediate level, I2, and to a peak level, P , are limited by thermal reactions. Treatm ents which primarily affect components at ...

When plant leaves or chloroplasts are exposed to illumination that exceeds their photosynthetic capacity, photoprotective mechanisms such as described by the energy-dependent (non-photochemical) quenching of chlorophyll fluorescence are involved. The protective action is attributed to an increased rate constant for thermal dissipation of absorbed quanta. We applied photoacoustic spectroscopy to...

Understanding the adaptability of Chionanthus retusus Lindl. et Paxt. to extreme water conditions will help in exploring potential application this species barren mountains. Three-year-old seedlings were used a greenhouse pot experiment that analyzed effect different moisture gradients on growth, photosynthetic and fluorescence characteristics, protective enzyme system, osmotic substance regula...

The effect of austenite deformation on carbon partitioning and transformation to athermal isothermal martensite, bainite during quenching (QP) is described for three steel compositions: Fe-0.3C-0.6Si-1.1Al, Fe-0.3C-1.0Si Fe-0.3C-0.5Si-0.5Al. Microstructures were characterized using SEM-EBSD, TEM XRD. Austenite decomposition kinetics was investigated dilatometry. Deformation close the no-recryst...

Acclimation of wild type and the chlorina F2 mutant of barley to either high light or low temperature results in a 2- to 3-fold increase in non-photochemical quenching which occurred independently of either energy-dependent quenching (qE), xanthophyll cycle-mediated antenna quenching or state transitions. Results of in vivo thermoluminescence measurements used to address this conundrum indicate...

Exposure of Arabidopsis thaliana young and mature leaves to the herbicide paraquat (Pq) resulted in a localized increase of hydrogen peroxide (H2O2) in the leaf veins and the neighboring mesophyll cells, but this increase was not similar in the two leaf types. Increased H2O2 production was concomitant with closed reaction centers (qP). Thirty min after Pq exposure despite the induction of the p...

KRAS mutations are detected in tumors of various organs, and they are also markers of resistance for epidermal growth factor receptor (EGFR) tyrosine kinase inhibitors and monoclonal antibodies against the EGFR. Thus, the accurate and rapid detection of KRAS mutations is crucial, not only for screening, but also for the prediction of the efficacy of molecular-targeted therapy. The aim of the pr...

Violaxanthin de-epoxidation, chlorophyll fluorescence quenching, and photosynthetic O(2) evolution in the presence of paraquat (Pq) were studied in intact attached leaves of Pq-susceptible, and Pq-resistant (PqR) biotypes of Erigeron canadensis under different light conditions. Initially, similar changes were induced in the two biotypes, but the effects relaxed only in the PqR plants, indicatin...