The exogenous application of salicylic acid can induce plant resistance against pathogens. However, little is known about the potential uses this bioregulator for controlling coffee diseases. In study, we assessed effect applying (SA – 150 mg L-1) on management rust (Hemileia vastatrix) in a 7-year-old plantation with low crop load (651.6 kg ha-1 2017). For comparison, plants were sprayed prote...

Global climate change, specifically the intensification of marine heatwaves, affect seagrasses. In Ria Formosa, saturating light intensities may aggravate heatwave effects on seagrasses, particularly during low spring tides. However, photophysiological and antioxidant responses seagrasses to such extreme events are poorly known. Here, we evaluated Cymodocea nodosa exposed at 20 °C 40 150 450 ?m...

Reactive oxygen species (ROS) are produced during seed desiccation, germination, and ageing, leading to cellular damage and seed deterioration and, therefore, decreased seed longevity. The effects of simultaneous over-expression of two antioxidant enzymes on seed longevity and seed germination under stressful conditions were investigated. Transgenic tobacco simultaneously over-expressing the Cu...

Despite very similar protein structures, ascorbate peroxidase (APX) and yeast cytochrome-cperoxidase (CCP) stabilize different radical species during enzyme turnover. Both enzymes contain similar active site residues, including the tryptophan that is oxidized to a stable cation radical in CCP. However, the analogous trytophan is not oxidized in APX, and the second oxidizing equivalent is retain...

Brachypodium distachyon (Brachypodium) is a powerful model system for studying cereal, bioenergy, forage, and turf grasses. Nucleotide diversity (π) and linkage disequilibrium (LD) in candidate genes involved in the antioxidative pathways in this species are not known. The average π for CAT encoding catalase, GPX encoding glutathione peroxidase, DHAR encoding dehydroascorbate reductase, MDHAR e...

to inspect the effect of methyl salicylate (mesa) vapor on fruit shelf life quality in kiwifruit (actinidia chinensis cv. hayward) an experiment was carried out in citrus research institute, ramsar, iran in 2006-2007. the experiment was based on a completely random design of three replications. the treatments consisted of mesa at five rates (0, 8, 16, 24 and 32 µl/l) and storage time of five le...

Increasing water temperatures because of climate change resulted in population shifts and physiological responses aquatic environments. In this study, short-term high-temperature condition effects on green algae Chlorella vulgaris were investigated at transcriptional levels. The photosystem II D1 protein (psbA) gene, a large unit Rubisco (rbcL) gene chloroplastic ascorbate peroxidase (cAPX) exp...

The active oxygen species (AOS) that arise from normal metabolic processes are kept under tight control by various antioxidant mechanisms. AOS are important signal molecules that regulate many physiological processes, including environmental stress responses. In this work, we have investigated the effect of lowered cytosolic ascorbate peroxidase (APX) activity in transgenic tobacco BY-2 cells, ...

Salinization usually plays a primary role in soil degradation, which consequently reduces agricultural productivity. In this study, the effects of salinity on growth parameters, ion, chlorophyll, and proline content, photosynthesis, antioxidant enzyme activities, and lipid peroxidation of two cotton cultivars, [CCRI-79 (salt tolerant) and Simian 3 (salt sensitive)], were evaluated. Salinity was...

Passiflora setacea D.C. is a wild species native to the Brazilian Cerrado, with agronomic and medicinal potentials. The cultivar BRS Pérola do Cerrado first registered protected of has become an alternative passion fruit market due its desirable characteristics for food, ornamental pharmaceutic industries. Since plant tissue culture techniques are considered important tools large-scale p...