Temat: seedling root - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Fungi colonizing roots of zucchini (Cucurbita pepo L. var. giromontina) plants and pathogenicity of Fusarium spp. to zucchini seedlings
Grzyby zasiedlające korzenie roślin cukinii (Cucurbita pepo L. var. giromontina) oraz patogeniczność grzybów rodzaju Fusarium dla siewek cukinii
Autorzy:: Jamiolkowska, A.
Wagner, A.
Sawicki, K.
Powiązania:: https://bibliotekanauki.pl/articles/26981.pdf
Data publikacji:: 2011
Wydawca:: Polskie Towarzystwo Botaniczne
Tematy:: fungi
root
zucchini
Cucurbita pepo var.giromontina
plant root
pathogenicity
Fusarium
seedling
root rot
stem base rot
Opis:: Zucchini is a very valuable vegetable, easy to grow both in the field and under covers but it is often attacked by soil-borne fungi. The investigations were carried out in a farm near Lublin where three zucchini cultivars: Astra, Atena and Soraya, were grown in a tunnel and in the field in 2008-2009. Plants with stem and root rot were collected for laboratory tests. Mycological analysis showed that the predominant fungi were F. culmorum, F. equiseti and F. oxysporum. More Fusarium colonies were isolated from the roots of zucchini grown in the tunnel. In the pathogenicity test, all tested isolates of F. culmorum, F. equiseti and F. oxysporum proved to be pathogenic to zucchini seedlings, causing stunting, stem and root rot. The highest disease index was noticed in the combination with F. culmorum isolate fck61.
Źródło:: Acta Agrobotanica; 2011, 64, 1
0065-0951
2300-357X
Pojawia się w:: Acta Agrobotanica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Phenolic compounds and properties of antioxidants in grapevine roots [Vitis vinifera L.] under drought stress followed by recovery
Autorzy:: Weidner, S
Karolak, M.
Karamac, M.
Kosinska, A.
Amarowicz, R.
Powiązania:: https://bibliotekanauki.pl/articles/59363.pdf
Data publikacji:: 2009
Wydawca:: Polskie Towarzystwo Botaniczne
Tematy:: soil condition
drought stress
oxidative stress
root
Vitis vinifera
seedling
plant root
phenolic compound
root tissue
grape-vine
soil moisture
antioxidative system
Opis:: Grapevine seedlings Vitis vinifera were grown in a greenhouse under optimum conditions (soil moisture ca 70%) and under drought stress (soil moisture ca 35%). In addition, some of the plants subjected to drought underwent subsequent regeneration under optimum conditions. Drought stress caused accumulation of total phenolic compounds in grapevine roots, which may indicate that these compounds play an important role in the adaptation of roots to growth under stress conditions. Phenolic acids found in the roots occurred in the ester-bound form only. p-coumaric acid was present in the highest concentrations (6.2 to 10.5 µg/g fresh matter). The content of ferulic acid was lower, ranging from 2.4 to 4.6 µg/g fresh matter. The lowest concentration in grapevine roots was achieved by caffeic acid (2.4 to 2.9 µg/g fresh matter). The levels of p-coumaric and ferulic acids in roots rose significantly under the drought stress, while the concentration of caffeic acid increased during the post-drought recovery period. This may suggest that some of the phenolic acids protect plants under stress conditions. All the extracts from grapevine roots had antioxidative properties, but the antiradical activity of the extracts obtained from roots subjected to drought stress was inferior to the control. The same extracts were also characterised by depressed reducing power. The results imply that tolerance of grapevine to soil drought may be associated with the value of antioxidative potential in root tissues of these plants.
Źródło:: Acta Societatis Botanicorum Poloniae; 2009, 78, 2; 97-103
0001-6977
2083-9480
Pojawia się w:: Acta Societatis Botanicorum Poloniae
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Effects of fungi isolated from Quercus robur roots on growth of oak seedlings
Autorzy:: Kwasna, H.
Szewczyk, W.
Powiązania:: https://bibliotekanauki.pl/articles/41173.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:: growth inhibition
fungi
endophyte
isolation
Quercus robur
root
plant growth
oak
seedling
Opis:: Effects of 62 isolates (of 41 taxa) of fungi on growth of 1-year-old oak (Quercus robur) seedlings were studied in an inoculation experiment. The fungi were isolated from roots of 80–96-year-old Q. robur that had been subjected to periodic flooding and had symptoms of oak decline. The fungal genera included Alternaria, Aspergillus, Calonectria, Chaetomium, Cladosporium, Clonostachys, Corynespora, Cylindrocarpon, Dicyma, Geotrichum, Ilyonectria, Isaria, Metarhizium, Oidiodendron, Ophiostoma, Pezicula, Phialocephala, Phialophora, Pyrenochaeta, Sporendocladia, Sporothrix, Thelonectria, Trichoderma and Trimmatostroma. Mycelial colonies of fungi growing in potato-dextrose broth were used for soil inoculation. Plant growth was assessed 2 years after inoculation, when the plants were 3 years old. Stem lengths, and dry weights of stems, roots and leaves were measured. Stem growth was inhibited by 31 isolates (50%) and root growth by 12 isolates (19%). Stem growth was stimulated by two isolates (3%) and root growth by 17 isolates (27%). The overall ratio of inhibitors to stimulants was 2.1. The proportion of taxa that inhibited stem growth was 16 times greater than that which promoted stem growth. The proportion of taxa that promoted root growth was only 1.5 times greater than that which inhibited root growth. The structure of the fungal communities in periodically flooded oak forests suggests that they are more likely to inhibit than to promote vigour in oaks.
Źródło:: Dendrobiology; 2016, 75
1641-1307
Pojawia się w:: Dendrobiology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Changes in the ultrastructure of Capsicum annuum L. seedlings roots under aluminum stress conditions
Zmiany w ultrastrukturze korzeni siewek Capsicum annuum L. w warunkach stresu glinowego
Autorzy:: Konarska, A
Powiązania:: https://bibliotekanauki.pl/articles/28470.pdf
Data publikacji:: 2008
Wydawca:: Polskie Towarzystwo Botaniczne
Tematy:: stress condition
ultrastructural change
root
aluminium stress
Capsicum annuum
seedling
plant
aluminum zob.aluminium
red pepper
Opis:: The effect of aluminum was investigated on the cell ultrastructure of roots of fourteen-day-old `Trapez` red pepper seedlings grown in water culture. Disorders in the cell structure were observed using transmission electron microscopy (TEM). An analysis of longitudinal sections of the apical region of the control plants’ roots showed that cells of the cap and cells of the meristematic region had an arrangement and shape typical for these root regions, and cell organelles were properly developed. Changes in the cell structure under the infl uence of aluminum involved a reduction in the number of starch grains in the leucoplasts of the cap, the formation of lobate nuclei and a reduction in the number of cisternae in the dictyosomes as well as the damage of the cell membranes. Moreover, the swelling of mitochondria was observed with a simultaneous reduction in the number of mitochondrial cristae or the bursting of the membrane of these structures. In the vacuoles of the investigated root section, the presence of numerous electron-opaque large-sized formations was found, being most probably aluminum deposits. The cell wall, often thickened, was wavy or the formation of two walls in close distance was observed. The obtained results prove the high sensitivity of the studied red pepper cultivar to aluminum stress.
Badano wpływ glinu na ultrastrukturę komórek korzenia czternastodniowych siewek papryki rocznej `Trapez` uprawianych w kulturach wodnych. Zaburzenia struktury komórek obserwowano w transmisyjnym mikroskopie elektronowym (TEM). Analiza podłużnych przekrojów wierzchołkowej strefy korzeni roślin kontrolnych wykazała, że komórki czapeczki i komórki strefy merystematycznej miały układ i kształt typowy dla tych stref korzenia, a organella komórkowe były prawidłowo wykształcone. Zmiany w strukturze komórek pod wpływem glinu polegały na redukcji liczby ziaren skrobi w leukoplastach czapeczki, tworzeniu płatowatych jąder oraz redukcji liczby cystern w diktiosomach, a także uszkodzeniu membran komórkowych. Zaobserwowano ponadto pęcznienie mitochondriów przy jednoczesnym zmniejszaniu się liczby grzebieni mitochondrialnych lub pękaniu otoczki tych struktur. W wakuolach badanego odcinka korzenia stwierdzono obecność licznych nieprzejrzystych elektronowo tworów o pokaźnych rozmiarach, będących najprawdopodobniej depozytami glinu. Ściana komórkowa była często zgrubiała, pofałdowana lub obserwowano tworzenie się dwu ścian w bliskim sąsiedztwie. Uzyskane wyniki świadczą o dużej wrażliwości badanej odmiany papryki na stres glinowy.
Źródło:: Acta Agrobotanica; 2008, 61, 1
0065-0951
2300-357X
Pojawia się w:: Acta Agrobotanica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Oxygen concentration in primary roots of broadbean, lupin and pea seedling as measured with a microelectrode
Autorzy:: Stepniewski, W.
Zausig, J.
Przywara, G.
Horn, R.
Powiązania:: https://bibliotekanauki.pl/articles/25979.pdf
Data publikacji:: 1998
Wydawca:: Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:: Lupinus angustifolius
Helianthus annuus
pea
root
seed
Vicia faba
electrode construction
concentration
seedling
measurement procedure
lupin
broad bean
soil moisture
Pisum sativum
oxygen
Źródło:: International Agrophysics; 1998, 12, 2
0236-8722
Pojawia się w:: International Agrophysics
Dostawca treści:: Biblioteka Nauki

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