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Wyszukujesz frazę "proline" wg kryterium: Wszystkie pola

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    Wyświetlanie 1-5 z 5
    Tytuł:
    Growth, proline content and proline-associated gene expression of autotetraploid Betula platyphylla responding to NaHCO3 stress
    Autorzy:
    Mu, H.
    Lin, L.
    Zhang, Q.
    Tang, X.
    Zhang, X.
    Cheng, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/41683.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    plant growth
    proline content
    stress response
    gene expression
    autotetraploid
    Betula platyphylla
    birch
    Sodium bicarbonate
    plant stress
    Opis:
    Plant breeders have focused much attention on polyploid trees because of their resistance for forestry. To evaluate the impact of intraspecies genome duplication on NaHCO3 stress, a series of Betula platyphylla autotetraploids and diploids were generated from the same family. The growth, proline content and proline-associated gene expression of these autotetraploid individuals were compared with those diploid trees. Autotetraploids were superior in injury index and relative growth of height and base diameter compared to diploids. The proline content was higher in autotetraploid individuals compared to diploids. Gene expression data revealed autotetraploids were generally higher expression in BpP5CS1, BpP5CS2, Bp- P5CR1, BpP5CR2, BpP5CR3 and BpOAT and were lower expression in BpProDH and BpP5CDH compared to diploid trees. These results shed light on resistance variation in birch autotetraploidization and polyploidy breeding as a new approach for genetic improvement of birch trees.
    Źródło:
    Dendrobiology; 2016, 75
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Nutrient characteristics and proline accumulation in relation to Picea abies status on drained peat soils
    Autorzy:
    Cekstere, G.
    Osvalde, A.
    Snepsts, G.
    Laivins, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2078188.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    Norway spruce
    crown status
    soil and foliar analysis
    proline
    sub-boreal zone
    Opis:
    Monocultures of Norway spruce widely used for afforestation of drained peat soils often have low productivity and decline in vitality. The research aim was to elucidate: (1) imbalances in the nutrient status of soil and plants in relation to Norway spruce crown status and annual increment on drained peat soil in the sub-boreal zone; (2) the suitability of using proline accumulation as a biomarker for Norway spruce vitality and stress in nutrient imbalance conditions. The study was conducted at five forest (Oxalidosa turf. mel.) sites in Latvia, each containing trees with different crown condition status. Chemical analyses of soil and spruce needles, assessment of tree crown vitality and annual increment measurements were done. Our results revealed serious disturbances in the supply of nutrients, which is an important factor in the decline of Norway spruce in monoculture stands on drained peat soils. Deficiency of K, Fe, Cu, B, N and P was found in the current year needles for all trees, but in damaged trees (≥61% defoliation, ≥61% discoloration) Zn deficiency was also found. For 2-year-old needles, deficiency of K, P, S, Zn, and Cu was found in all trees, additionally, deficiency of Fe was found in healthy and medium damaged trees (26–60% defoliation, 21–60% discoloration), and N deficiency was found for medium damaged and damaged trees. Thus, K, Cu, B, Fe concentrations had significant negative correlations with crown status parameters – defoliation, discoloration, and density. K and B deficiency could play the most significant causal role in decreased stem increment. The results revealed that the stress amino-acid proline is a reliable biomarker, having a significant relationship with spruce crown condition parameters, annual increment and nutrient status in needles – low levels of K, Fe, S, Cu, B, N. The increase in proline content in spruce needles was pronounced in moderately damaged trees, indicating the potential for the use of proline accumulation as early stress indicator for spruce. Therefore, further studies on the identification of early stress and factors affecting nutrient uptake and accumulation in needles are particularly valuable for evaluation of stand management options before significant decline of spruce stands.
    Źródło:
    Dendrobiology; 2020, 84; 94-108
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Seasonal patterns of free proline and carbohydrate levels in cherry laurel (Prunus laurocerasus) and ivy (Hederea helix) leaves and resistance to freezing and water deficit
    Autorzy:
    Bandurska, H
    Plachta, M.
    Woszczyk, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/41593.pdf
    Data publikacji:
    2009
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    evergreen shrub
    woody plant
    seasonal change
    temperature
    climate
    water-soluble carbohydrate
    proline
    free proline
    carbohydrate level
    leaf
    cherry laurel
    Prunus laurocerasus
    ivy
    Hedera helix
    freezing resistance
    water deficit
    resistance
    Opis:
    Seasonal changes in the levels of water-soluble carbohydrates, free proline and tolerance to freezing and water deficit were studied in leaves of cherry laurel (Prunus laurocerasus) and ivy (Hedera helix). Frost and water deficit tolerance was estimated based on the measurement of electrical conductivity of aqueous media containing leaf discs that were previously treated with frost (–7°C) or polyethylene glycol solution (PEG 600), respectively. Carbohydrate content in leaves of examined species changed differently throughout the measurement period. In laurel leaves the highest carbohydrate level was found in February, while it was lowest in June. In contrast, in ivy leaves the highest carbohydrate content was recorded during summer (June, July), while the lowest in February. However, a lack of correlation between soluble carbohydrate level and membrane injury index was shown in this study. Free proline content in leaves of investigated species was the highest in early spring, i.e. April. The lowest level of free proline in laurel leaves was found in July, September and October, but in ivy from July to February. A negative correlation between proline content and membrane injury index observed in frost and PEG treated leaves of both species suggest that this amino acid may have resulted on membrane protection.
    Źródło:
    Dendrobiology; 2009, 62; 3-9
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Exogenous seed treatment with proline and its consequences to Norway spruce (Picea abies (L.) H. Karst) seedling establishment
    Autorzy:
    Kijowska-Oberc, J.
    Wawrzyniak, M.K.
    Staszak, A.M.
    Ratajczak, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/2130182.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    proline
    seed treatment
    Norway spruce
    seedlings development
    tree seeds
    oxidative stress
    Opis:
    Accumulation of proline is a defense mechanism against external stress conditions, preventing damage to the structure and function of cells and improving plant development processes, such as germination. The purpose of this study was to investigate proline treatment as a means of improving the germination and development of Norway spruce seedlings. The effect of exogenous proline has been studied in three stages of initial plant development. The collected seeds were soaked in water or 8 mM proline solution and placed on the germinators. The germination capacity and the mean germination time were determined. Seedlings with radicles >10 mm were transferred to the sand-peat substrate at a constant temperature of 20 °C. Seedlings at 3 subsequent developmental stages (S1 – germinated seeds with radicles > 3 mm; S2 – seedlings with radicles >10 mm; S3 – established seedlings grown for 90 days) were examined for the oxygen consumption rate, total antioxidant capacity, hydrogen peroxide level, malondialdehyde level and intracellular proline content. Proline treatment was conducive to lowering the levels of hydrogen peroxide and malondialdehyde at stage S1. At the subsequent stages of development, the levels of hydrogen peroxide and malondialdehyde increased, and at the S3 stage, there was also a marked increase in total antioxidant capacity. At stage S3, the seedlings of the proline treatment were characterized by a lower total mass, and the response to exogenous proline was stronger in the root tissues than in the leaves. The oxygen consumption rate was higher for the proline treatment at all stages of development. Seedlings at the analyzed stages of establishment differed in response to proline treatment. Exogenous proline had some beneficial effects during the first phase of germination by reducing the level of hydrogen peroxide and improving the condition of lipid membranes. In the subsequent stages of seedling development, in response to the same concentration of proline solution, undesirable effects, such as an increase in hydrogen peroxide levels and damage to cytoplasmic membranes, were observed. Optimal concentrations of exogenous proline should be determined prior to commercial use of proline treatment to improve plant stress tolerance.
    Źródło:
    Dendrobiology; 2022, 87; 149-162
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Halotolerant fungi stimulate growth and mitigate salt stress in Alnus glutinosa Gaertn.
    Autorzy:
    Thiem, D.
    Tyburski, J.
    Golebiewski, M.
    Hrynkiewicz, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/2077648.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    black alder
    ectomycorrhiza
    saprophytic fungi
    inoculation
    proline
    Opis:
    Soil salinity is an important abiotic stress factor that reduces both plant growth and development and decreases diversity and metabolic potential of microorganisms, particularly fungi. However, some fun- gal isolates, including mycorrhizal fungi, can increase tolerance of plants to salinity, e.g. by activation of de- fense mechanisms. Main aim of our study was: (i) to identify and characterize fungal strains isolated from fruitbodies growing at saline test sites and (ii) to determine the effect of fungal inoculation on the growth and salinity tolerance of Alnus glutinosa Gaertn. seedlings. Two ectomycorrhizal strains (Amanita muscaria OW-10 and Paxillus involutus OW-5) and a saprotrophic one (Gymnopus sp. OW-6) were isolated from fruit- bodies collected at naturally saline test sites. The plant growth promotion was observed after inoculation of plants with the ectomycorrhizal fungus – P. involutus OW-5, while the use of Gymnopus sp. OW-6, displaying the highest hydrolytic activity, decreased seedling growth parameters. Moreover, P. involutus OW-5 (char- acterized by characterized by medium salt tolerance salt tolerance) promoted growth of black alder in the presence of salt, while A. muscaria OW-10 (with the highest salt tolerance) increased fresh and dry mass of seedlings only in the absence of salt. Black alder seedlings inoculated with P. involutus OW-5 revealed higher synthesis of proline in aboveground organs compared to the control plants which suggested that accumulation of this compound can be a mechanism protecting black alder seedlings against salt stress. In conclusion, we recommend the use of P. involutus OW-5, which displayed the best plant growth promoting ability and salt tolerance, for inoculation of black alder trees used in reclamation of saline habitats
    Źródło:
    Dendrobiology; 2020, 83; 30-42
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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