Wyniki wyszukiwania

1

Nucleoside diphosphate kinase isoforms regulated by phytochrome A isolated from oat coleoptiles

100%

Hetmann A., Kowalczyk S.

Acta Biochimica Polonica

|

2009

|

tom 56

|

nr 1

143-153

Nucleoside diphosphate kinase (NDPK) (EC 2.7.4.6), the enzyme transferring the phosphate residue from ATP to nucleoside diphosphates, is localized mainly in the cytoplasm and mitochondria and in smaller amounts in cell nuclei and the microsomal fraction. Exposure of etiolated oat seedlings to red light causes an increase of the enzyme activity by about 42% in nuclear fraction, 7% in etioplastic and 14% in postetioplastic fraction. Endogenous phytochrome A, as visualized by an immunochemical method, translocates from the cytoplasm into the nucleus upon red, far-red or white light activation. Nuclei purified from oat seedlings contain two, and the postnuclear fraction four easily separated forms of NDPK. One of the nuclear isoforms (In) and one isoform isolated from the postnuclear fraction (IIpn) are activated by red light in the presence of phytochrome A purified from etiolated oat coleoptiles. Both phytochrome A-activated NDPKs purified to electrophoretic homogeneity have the same molecular mass (17-18 kDa) determined by SDS/PAGE. Both enzymes in the native form have similar molecular masses (71 and 63 kDa).

2

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

Winter storage of pedunculate oak (Quercus robur L.) seedlings

100%

Wesoly W., Chabowska A.

Zarządzanie Ochroną Przyrody w Lasach

|

2016

|

tom 10

3

Effect of mycorrhiza inoculation of pepper seedlings (Capsicum annuum L.) on the growth and protection against Fusarium oxysporum infection

100%

Jemiolkowska A., Michalek W.

Acta Scientiarum Polonorum. Hortorum Cultus

|

2019

|

tom 18

|

nr 1

A study was conducted to investigate the ability of arbuscular mycorrhizal fungi (AMF) in enhancing the growth and control of a root rot caused by different isolates of Fusarium oxysporum in sweet pepper seedlings. The plants were grown in plastic pots filled with sterilized horticultural soils. There were four treatments applied as follows: Fo (seedlings infected with fungus), M (seedlings inoculated with mycorrhizal fungi), Fo + M (seedlings inoculated with mycorrhiza and infected with fungus) and control. A randomized experiment was used and the growth, disease index, and photosynthetic activity of the plants were measured after 4 weeks. The investigations showed that the mycorrhizal inoculation had a protective effect on the F. oxysporum-infected pepper seedlings. The plants were characterized by a higher growth rate and a lower disease index than those growing only in the presence of the pathogenic fungus. The roots inoculated with mycorrhizal fungi were better developed than those infected only with F. oxysporum. The mycorrhiza contributed to an increase in the photosynthetic activity of the pepper seedlings.

4

Hardening pretreatment by drought and low temperature enhanced chilling stress tolerance of cucumber seedlings

100%

Ghanbari F., Kordi S.

Acta Scientiarum Polonorum. Hortorum Cultus

|

2019

|

tom 18

|

nr 2

Chilling stress is of major limiting factors influencing the growth and development of warm-season crops like cucumber. In this research, the possibility of chilling tolerance of cucumber seedlings was investigated through employing the drought and low-temperature pretreatments. The factorial experiment consisted of two factors including cucumber cultivars (i.e. ‘Super Dominos’ and ‘Super Star’) and hardening treatments (control, low temperatures at 10°C, and 15°C and drought simulated by 10% and 20% PEG) based on completely randomized design (CRD) in 3 replications. After applying treatments and providing them 48 h opportunity to be recovered, the seedlings were subjected to 3°C for a six-day period and 6 h for each day. All hardening treatments improved seedlings’ growth, chlorophyll content, total phenol (TP) and antioxidant enzyme activities, while reducing chilling injury index and malondialdehyde (MDA) content. Comparing to temperature hardening, the drought pretreatment showed to have a better effect on inducing the chilling tolerance into cultivars. Overall, the results of this experiment showed that employing drought and low-temperature pretreatments enabled cucumber seedlings to mitigate the harmful effects of chilling.

5

Modelowanie wzrostu rozsady kapusty chińskiej (Brassica rapa var.chinensis) oraz ocena zależności między cechami roślin przed sadzeniem do gruntu i podczas zbiorów

100%

Kalisz A., Kostrzewa J.

Acta Agrophysica

|

2012

|

tom 19

|

nr 2

Przedstawiono wykorzystanie analizy regresji prostej do stworzenia modeli wzrostu rozsady kapusty chińskiej (Brassica rapa var. chinensis, pak choy) względem czasu, jak też do przewidywania rozwoju liści tych roślin na podstawie temperatur efektywnych (stopniodni). Opracowane modele czasowe charakteryzowały się wysokimi współczynnikami determinacji R2 wynoszącymi od 0,765 do 0,880 (dla wysokości rozsady) oraz od 0,964 do 0,970 (liczba liści). Dla temperatur efektywnych dopasowanie danych przewidywanych, dotyczących rozbudowy aparatu liściowego rozsady, do rzeczywistych wynosiło ponad 89%. Rozsadę produkowano w dwóch terminach, wysiewając nasiona na początku III dekady lipca (1. termin) i na początku sierpnia (2. termin). Rozsada przygotowywana w terminie późniejszym posiadała większą wysokość rozetek oraz powierzchnię i długość liści. Charakteryzowała się również większą świeżą masą części nadziemnej, jednocześnie niższą zawartością suchej masy, cukrów rozpuszczalnych i karotenoidów w porównaniu do 1. terminu. Stwierdzono istotne zróżnicowanie w analizowanych parametrach roślin ze względu na czynnik odmianowy. Cechy rozsady kapusty chińskiej były w dużej mierze skorelowane z cechami dojrzałych rozet oraz z plonem ogólnym tego warzywa.

6

Various biochemical changes of African marigold seedlings under sugar mill effluent stress

100%

Vaithiyanathan T., Sundaramoorthy P.

International Letters of Natural Sciences

|

2016

|

tom 50

Sugar mill is one of the agro based industry and great significant in rural economy of developing countries. It creates environmental pollution by produced waste during sugar production. In the present work deals with the analysis of various change of biochemical in African marigold (Tagetes erecta L.) at 15 DAS under the different concentrations (control, 10, 25, 50, 75 and 100%) of sugar mill effluent. Results of this study determined that the lower concentration (10%) of sugar mill effluent increased photosynthetic pigment and biochemical contents of African marigold and it decreased at higher concentrations of the sugar mill effluent. The lower concentrations of sugar mill effluent used for irrigation.

7

The effect of multiple heavy metals on ascorbate, glutathione and related enzymes in two mangrove plant seedlings [Kandelia candel and Bruguiera gymnorrhiza]

80%

Huang G.-Y., Wang Y.-S., Sun C.-C., Dong J.-D., Sun Z.-X.

Oceanological and Hydrobiological Studies

|

2010

|

tom 39

|

nr 1

11-25

8

Ocena przepuszczalności błon komórkowych siewek jęczmienia w warunkach niedoboru wody

80%

Acta Agrophysica

|

2017

|

tom 24

|

nr 3

Badania dotyczące wpływu niedoboru wody na przepuszczalność błon komórkowych liści i korzeni siewek jęczmienia jarego odmian Ella i Kucyk przeprowadzono w kontrolowanych warunkach. Oceny przepuszczalności błon komórkowych dokonano zmodyfikowaną metodą konduktometryczną. Obliczono względny wyciek elektrolitów (EL) na podstawie wartości przewodnictwa elektrycznego. Za pomocą metody spektrofotometrycznej wyznaczono względny współczynnik wycieku (RLR). Stwierdzono, że wartości zarówno EL, jak i RLR wzrastają wraz ze wzrostem niedoboru wody. Może to świadczyć o zmianach w błonach komórkowych i utracie przez nie właściwości półprzepuszczalnych pod wpływem niedoboru wody. Zaobserwowano wyższe wartości współczynnika RLR w porównaniu do wartości wskaźnika EL podczas oceny uszkodzeń błon komórkowych liści i korzeni siewek obu odmian jęczmienia.

9

Impact of natural and synthetic plant stimulants on Moringa seedlings grown under low-temperature conditions

80%

Batool S., Khan S., Basra S. M., Hussain M., Saddiq M. S., Iqbal S., Irshad S., Hafeez M. B.

International Letters of Natural Sciences

|

2019

|

tom 76

Low-temperature results in various physiological and metabolic disturbances in cells of plants which are sensitive to low-temperatures. Moringa is getting popularity as a field crop because of its multipurpose usage. There is no information available about effects of low-temperature (14-18℃) on moringa seedlings and its mitigation. The present study was conducted to test the performance of moringa seedling grown in wire house under low-temperature conditions in response to foliar application of moringa leaf extract (3% solution), hydrogen peroxide (5 ml L⁻¹), ascorbic acid (50 mg L⁻¹) and salicylic acid (50 mg L⁻¹). Seeds of six moringa accessions [Local landrace grown at Agronomic Research Area, Z.A Hashmi Hall, Firdous Colony; Exotic landrace grown at Lalazaar Colony, Department of Agronomy and Agronomic Research Area] were collected and grown in polythene bags filled with equal ratio of compost, sand, silt and clay. All foliar treatments were applied twice; the first round at the seedling age one month and the second round at the seedling age two months. Foliar application of moringa leaf extract significantly enhanced number of branches (92%) and leaves (39%), leaf total chlorophyll contents (73%), leaf phenolic contents (53%) and membrane stability index (57%) of moringa seedlings compared to control. Healthy and vigorous growth of moringa seedlings with higher concentration of antioxidants ensured the defensive potential of moringa leaf extract against low-temperature condition.

Ograniczanie wyników

Nucleoside diphosphate kinase isoforms regulated by phytochrome A isolated from oat coleoptiles

Winter storage of pedunculate oak (Quercus robur L.) seedlings

Effect of mycorrhiza inoculation of pepper seedlings (Capsicum annuum L.) on the growth and protection against Fusarium oxysporum infection

Hardening pretreatment by drought and low temperature enhanced chilling stress tolerance of cucumber seedlings

Modelowanie wzrostu rozsady kapusty chińskiej (Brassica rapa var.chinensis) oraz ocena zależności między cechami roślin przed sadzeniem do gruntu i podczas zbiorów

Various biochemical changes of African marigold seedlings under sugar mill effluent stress

The effect of multiple heavy metals on ascorbate, glutathione and related enzymes in two mangrove plant seedlings [Kandelia candel and Bruguiera gymnorrhiza]

Ocena przepuszczalności błon komórkowych siewek jęczmienia w warunkach niedoboru wody

Impact of natural and synthetic plant stimulants on Moringa seedlings grown under low-temperature conditions