INTRODUCTION Eryngium maritimum L. is a littoral species growing on sand dunes and shingle beaches. Although it listed among the widespread in western southern Europe, overall its population declining (Van der Maarel & Van Maarel-Versluys, 1996). The included Red Data Book of Latvia (Fatare, 2003) protected several other European countries. In northern Europe Baltic Region grows near limits current area distribution therefore at greater risk extinction because small isolated populations...

Crop wild relatives represent a valuable resource for the breeding of new crop varieties suitable sustainable productivity in conditions climate change. The aim present study was to assess salt tolerance several accessions T. fragiferum from habitats with different salinity levels controlled conditions. Decrease plant biomass and changes partitioning between organs characteristic response plants increasing substrate salinity, but these responses were genotype-specific. In accessions,...

L. is an obligatory halophyte species showing optimum growth at elevated soil salinity levels, but the ionic requirements for stimulation are not known. The aim of present study was to compare effects sodium, potassium and calcium in form chloride nitrate salts on growth, physiological performance, ion accumulation mineral nutrition

The aim of the present study was to explore heavy metal tolerance and accumulation potential in Anthyllis vulneraria subsp. maritima plants from coastal sand dunes controlled conditions. Plants were established seeds collected cultivated substrates greenhouse A gradual treatment with CdCl2, PbOAc, CuSO4, MnSO4, ZnSO4 performed until three final concentrations for each reached. number leaves, their biomass, biomass roots negatively affected by increasing lead (Pb) manganese (Mn) substrate,...

The effect of regurgitant from Leptinotarsa decemlineata Say larvae on wound-induced responses was studied using two plant species, Solanum tuberosum L. and Phaseolus vulgaris Wounding one leaf intact S. plants differentially affected ethylene production activities peroxidase polyphenol oxidase. Only oxidase activity stimulated by wounding in both wounded systemic leaves. Peroxidase not wounding. caused only a transient increase application to wound surfaces as well significantly enhanced...

The aim of this study was to compare the effects using compost and vermicompost as soil amendments in organic herb production, four species (Dracocephalum moldavica L., Melissa officinalis Nepeta cataria L. Thymus vulgaris L.) model plants. Plants were cultivated a greenhouse containers filled with from an organically certified field that had been amended equal rates cow manure or [0%, 10%, 20% 30% (v/v) for M. N. cataria, 0%, 20%, 30%, 40% D. T. vulgaris]. herbs showed different sensitivity...

The aim of the present study was to evaluate tolerance salinity and different heavy metals as well phytoextraction potential Ranunculus sceleratus plants from a brackish coastal sandy beach habitat. Four separate experiments were performed with R. in controlled conditions: (1) effect NaCl gradient on growth ion accumulation, (2) Na+ K+ salts (3) metal accumulation potential, (4) forms Pb (nitrate acetate) plant accumulation. A negative biomass evident at 0.5 g L−1 inhibited by 44% 10 Na+,...

An understudied problem in plant heavy metal biology is the effects of acute versus gradual or chronic exposure. The aim present study was to compare growth and physiological responses Rumex hydrolapathum Huds. plants subjected Mn stress treatment controlled conditions. Heavy applied substrate either as one 1.00 g L−1 dose (acute treatment) same four steps increasing amounts within 12 days (gradual treatment). Peroxidase activity actively photosynthesizing leaves used for monitoring induced...

A positive effect of organic-rich sediments sapropels on plant growth has been suggested in general, but not proven an experimental basis.The aim the present investigation was to study biological activity freshwater sapropel and its product including analyses growth-affecting cultivable microorganisms.Besides mineral nutrients, contained unspecified substances promoting a seedling test with beetroot, Swedish turnip, carrot tomato.Summed sapropel-containing substrate BioDeposit Agro had...

Bryophytes have been more and studied, due to presence of many biologically active compounds among their secondary metabolites, unique drought resistance as well wide use bioindicators environmental pollution.The aim the present study was determine seasonal changes in chemical composition metabolites four moss species (Sphagnum fallax, Sphagnum magellanicum, Polytrichum juniperinum, Pleurozium schreberi).Concentration main groups constituents antioxidant activity were determined related...

The aim of the present study was to compare tolerance several heavy metals and their accumulation potential Armeria maritima subsp. elongata accessions from relatively dry sandy soil habitats in Baltic Sea region using both vitro cultivated shoot explants long-term soil-cultivated plants at flowering stage as model systems. hypothesis that tested all will show a high metal reasonable potential, but possibly varying degrees. Under conditions tissue culture, accumulated extremely concentration...

The aim of the present study was to compare tolerance salinity and ion accumulation potential Armeria maritima subsp. elongata. Three accessions (AM1 AM2, both from Latvia, AM3 Sweden) relatively dry sandy soil habitats in Baltic Sea region were selected compared using vitro cultivated shoot explants long-term soil-cultivated plants at flowering stage. Growth root non-forming treated with increasing concentrations NaCl significantly inhibited starting 110 mmol L−1, rate formation even more...

The development of sustainable plant production systems involves a search for different alternatives to chemical fertilizers. aim the present study is compare growth and physiological effects vermicompost on Dracocephalum moldavica plants in controlled conditions, using two types commercially available substrates. intention determine whether nondestructively measured photosynthesis-related parameters are useful monitoring status plants. were cultivated base substrates without or with...

The aim of the present study was to compare changes in growth, ion accumulation and tissue water content relatively salt-tolerant plant taxa-Beta vulgaris subsp. maritima, Beta var. cicla, Cochlearia officinalis, Mentha aquatica Plantago maritima-as a result NaCl KCl salinity controlled conditions. Similar growth responses Na+ K+ form chloride salts were found for all model plants, including stimulation at low concentrations, an increase leaves, inhibition high less salt-resistant taxa. All...

The aim of the present study was to compare effect various salts composed different cations (Na+, K+) and anions (chloride, nitrate, nitrite) on growth, development ion accumulation in three Rumex species with accessions from sea coast habitats (Rumex hydrolapathum, longifolius maritimus) confertus an inland habitat. Plants were cultivated soil experimental automated greenhouse during autumn-winter season. Nitrite strongly inhibited growth all species, but R. maritimus least sensitive....

Ethylene evolution from etiolated barley (Hordeum vulgare), wheat (Triticum aestivum), and rye (Secale cereale) seedlings during coleoptile growth followed a rhythmic pattern, with period of about 16 h for 12 seedlings. Leaf emergence disturbed the established rhythm ethylene evolution.