quercus castanea/proline

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Changes in water status and proline and abscisic acid concentrations in developing somatic embryos of pedunculate oak (Quercus robur) during maturation and germination.

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Somatic embryos of oak (Quercus robur L.) were matured on P24 media differing in gel strength (0.8, 0.9 and 1.0% (w/v) agar). Viscosity and osmotic potential (Psipi,medium) of the media were determined. Developing cotyledonary embryos were analyzed at maturity Stages I-III for water content, osmotic

A molecular approach to drought-induced reduction in leaf CO2 exchange in drought-resistant Quercus ilex.

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Drought-induced reduction of leaf gas exchange entails a complex regulation of the plant leaf metabolism. We used a combined molecular and physiological approach to understand leaf photosynthetic and respiratory responses of 2-year-old Quercus ilex seedlings to drought. Mild drought stress resulted

Somatic embryogenesis and plant regeneration from immature embryos of five families of Quercus acutissima.

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Immature embryos of sawtooth oak (Quercus acutissima Carruth.) were obtained from five seed families and cultured on modified Murashige and Skoog nutrient medium containing 1 g/l L-glutamine and 5 mM proline and supplemented with 1.0 mg/l indole-3-butyric acid and 1.0 mg/l 6-benzylaminopurine. The

Somatic embryogenesis and plant regeneration in Quercus acutissima.

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Immature embryos of Quercus acutissima were collected weekly beginning 5 weeks post-fertilization and cultured on modified MS(Murashige and Skoog) medium containing 1,000 mg/l glutamine and 5 mM proline with different combinations of IBA(0.5-10.0 mg/l) and BA(0 or 1.0 mg/l) in light. The highest

Identification and function of a lebocin-like gene from the Chinese oak silkworm, Antheraea pernyi.

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Antimicrobial peptides (AMPs) play important roles in the insect innate immune response. To investigate the role of a lebocin-like protein in the oak silkworm, Antheraea pernyi, in response to immune challenge, an Ap-lebocin-like gene with an open reading frame of 489 bp was identified. This gene

Analysis of the expression of putative heat-stress related genes in relation to thermotolerance of cork oak.

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Cork oak (Quercus suber L.) is a research priority in the Mediterranean area and because of cork oaks' distribution these stands are experiencing daily stress. Based on projections of intensifying climate change and considering the key role of exploring the recovery abilities, cork oak seedlings

QsMYB1 expression is modulated in response to heat and drought stresses and during plant recovery in Quercus suber.

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Cork oak is an economically important forest species showing a great tolerance to high temperatures and shortage of water. However, the mechanisms underlying this plasticity are still poorly understood. Among the stress regulators, transcription factors (TFs) are especially important since they can

OakContigDF159.1, a reference library for studying differential gene expression in Quercus robur during controlled biotic interactions: use for quantitative transcriptomic profiling of oak roots in ectomycorrhizal symbiosis.

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Oaks (Quercus spp.), which are major forest trees in the northern hemisphere, host many biotic interactions, but molecular investigation of these interactions is limited by fragmentary genome data. To date, only 75 oak expressed sequence tags (ESTs) have been characterized in ectomycorrhizal (EM)

Warming and drought differentially influence the production and resorption of elemental and metabolic nitrogen pools in Quercus rubra.

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The process of nutrient retranslocation from plant leaves during senescence subsequently affects both plant growth and soil nutrient cycling; changes in either of these could potentially feed back to climate change. Although elemental nutrient resorption has been shown to respond modestly to

Antioxidant characterization of oak extracts combining spectrophotometric assays and chemometrics.

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Antioxidant characteristics of leaves, twigs, and acorns from two Serbian oak species Quercus robur L. and Quercus petraea L. from Vojvodina province (northern Serbia) were investigated. 80% ethanol (in water) extracts were used for antiradical power (ARP) determinations against DPPH(•), (•)NO, and

Differential physiological and biochemical responses of Quercus infectoria and Q. libani to drought and charcoal disease.

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The vast oak-dominated forests of the Zagros Mountains in southwestern Iran currently undergo large-scale dieback driven by a combination of drought and increasing incidence of charcoal disease caused by the fungal pathogens Biscogniauxia mediterranea and Obolarina persica. Here, we explore the

A novel cecropin B-derived peptide with antibacterial and potential anti-inflammatory properties.

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Cecropins, originally found in insects, are a group of cationic antimicrobial peptides. Most cecropins have an amphipathic N-terminal segment and a largely hydrophobic C-terminal segment, and normally form a helix-hinge-helix structure. In this study, we developed the novel 32-residue cecropin-like

Drought and air warming affect the species-specific levels of stress-related foliar metabolites of three oak species on acidic and calcareous soil.

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Climate change as projected for Central Europe will lead to prolonged periods of summer drought and enhanced air temperature. Thus, forest management practices are required to take into account how species performance is adapted to cope with these climate changes. Oak trees may play a major role in

Variations in physiological and biochemical traits of oak seedlings grown under drought and ozone stress.

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Despite the huge biodiversity characterizing the Mediterranean environment, environmental constraints, such as high sunlight and high temperatures alongside with dry periods, make plant survival hard. In addition, high irradiance leads to increasing ozone (O3 ) concentrations in ambient air. In this

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