Wyniki wyszukiwania

1

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

Environmental factors-induced stomatal signalling

100%

Merilo E., Laanemets K., Xue S., Margna L., Schroeder J., Brosche M., Kollist H.

BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology

|

2013

|

tom 94

|

nr 2

2

Diurnal dynamics of stomatal conductance and leaf temperature of grapevines (Vitis vinifera L.) in response to daily climatic variables

84%

Sabir A., Yazar K.

Acta Scientiarum Polonorum. Hortorum Cultus

|

2015

|

tom 14

|

nr 4

Few studies examined the stomatal conductance (gs) characteristics of grapevines with an emphasis on daily climatic responses. In the present study, diurnal measurements on leaf temperature and gs of three grapevine cultivars (Alphonse Lavallée, Crimson Seedless and Italia) were carried out. The leaf temperature values for the cultivars at 08:30 were 25.0 ±1°C and it increased to a maximum value between 12:00 and 14:50 p.m. After an almost steady course, it decreased along with the decrease in ambient temperature. The gs values increased from morning (08:30 a.m.) to mid-morning (10:30 a.m.) for all the cultivars. After reaching a peak level at mid-morning, the gs decreased gradually from the mid-morning throughout the afternoon. In the morning, the highest and the least gs values were obtained from Italia (232 mmol H2O m-2 s-1) and Crimson Seedless (149.6 mmol H2O m-2 s-1) cultivars. At around 10:30, the gs for Italia, Crimson Seedless and Alphonse Lavallée were at the highest levels with their valus 287.7, 262.1 and 242.0 mmol H2O m-2 s-1, respectively. The last measurements on gs at around 16:10 varied from to 96.7 (Italia) to 112.0 mmol H2O m-2 s-1 (Alphonse Lavallée). During the daily time course, the gs depended mainly on irradiance. Tleaf showed a strong relationship with Tair for all the cultivars. There was a strong, but negative correlation between leaf temperature and air humidity for all the cultivars.

3

Constitutively active guard cell plasma membrane Hplus-ATPase impairs ozone – elevated CO2־ and darkness-induced stomatal closur

84%

Nuhkat M., Roelfsema M. R. G., Kollist H.

BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology

|

2013

|

tom 94

|

nr 2

4

Effect of tropospheric ozone on photosynthetic activity of ozone-resistant and ozone-sensitive test plants (Nicotiana tabacum L., Phaseolus vulgaris L.)

84%

Borowiak K.

Polish Journal of Ecology

|

2013

|

tom 61

|

nr 4

Ozone-sensitive and -resistant tobacco plants and an ozone-sensitive bean were employed in this experiment. Plants were exposed at two different sites varying in ozone level, within Poznań city and in a remote forestry area. Net photosynthetic rate (PN), stomatal conductance (gs ) and intercellular CO₂ concentration (Ci ) were measured every 7th day until the 28th day of the experiment. The ozone concentrations were higher at the forest site (called here the high ozone site) than in the city (low ozone site). Mean hour ozone concentrations at forest site varied between 34.2–45.5 ppb and 30.2–39.2 ppb, while cumulative ozone concentrations (AOT 40) were 2032 ppb h⁻¹ and 611, respectively. The aim of the study was to compare the results of exposed ozone-sensitive and resistant test plants according to the potential effect of tropospheric ozone on natural vegetation. The experiment revealed the variability between exposure sites and plant species, as well as changes of photosynthetic parameters during the whole experimental season. Common bean assimilation parameters revealed the best correlation with the tropospheric ozone level. Tobacco test plants – ozone-sensitive and -resistant – varied in response to stress factors. There were no statistical differences between exposure sites and plant response. However, both ozone-sensitive and -resistant tobacco plants revealed lower levels of PN at the low ozone site, while ozone-sensitive bean revealed the opposite relation. Moreover, plants revealed gas exchange relations which were not previously observed in fumigation experiments (such as small differences in Ci levels of tobacco plant in the first three weeks). This might be a result of relatively low levels of tropospheric ozone during the experimental period. Hence, it is suggested to continue ambient air investigations to confirm or reject the results of this experiment.

5

The effect of irrigation frequency on growth, flowering and stomatal conductance of osteospermum Denebola and New Guinea impatiens Timor grown on ebb-and-flow benches

84%

Treder J., Nowak J.

Acta Agrobotanica

|

2001

|

tom 54

|

nr 2

The response of osteospermum 'Denebola' and New Guinea impatiens • grown on ebb-and-flow benches to different water potential of growing meIplied during whole growing period was investigated by measuring plant growth :ers and stomatal conductance (g,). After cutting establishment, four different In treatments based on soil water potential were applied to osteospermum: ,- 3.0, -10.0, - 20 kPa. In the case of impatiens the last water treatrnent was . Plants were evaluated when they reach one of the three growth stages: lateral shoots development, visible flower buds (osteospermum) or beginning of flowering s) and at flowering. All plants produced with a moderate water deficit (irrigation -3 and - 10 kPa) were more compact than plants irrigated at - 0,5 kPa but 'ering were not affected. Strong decrease in plant growth and flowering was when plants were irrigated at the lowest water potential (-20 kPa). However, for impatiens the highest irrigation frequency was also not favorable. As a result of , the decrease in stomatal conductance (gs) in both plants was observed. ,um was more resistant to water stress than impatiens.

6

Effect of different soil water potential on leaf transpiration and on stomatal conductance in poinsettia

84%

Nowak J. S.

Acta Agrobotanica

|

2002

|

tom 55

|

nr 2

Euphorbia pulcherrima Wild. 'Lilo' was grown in containers in 60% peat, 30% perlite and 10% clay (v/v) mixture, with different irrigation treatments based on soil water potential. Plants were watered at two levels of drought stress: -50 kPa or wilting. The treatments were applied at different stages of plant development for a month or soil was brought to the moisture stress only twice. Additionally, some plants were watered at -50 kPa during the entire cultivation period while the control plants were watered at -5 kPa. Plants were also kept at maximum possible moisture level (watering at -0.5 kPa) or c10se to it (-1.0 kPa) through the entire growing period. Soil water potential was measured with tensiometer. Drought stress applied during entire cultivation period or during the flushing stage caused significant reduction in transpiration and conductance of leaves. Stress applied during bract coloration stage had not as great effect on the stomatal conductance and transpiration of leaves as the similar stress applied during the flushing stage. High soil moisture increased stomatal conductance and transpiration rate, respective11y by 130% and 52% (flushing stage), and 72% and 150% (bract coloration stage) at maximum, compared to the control.

7

CO2 enrichment and mycorrhizal effects on cutting growth and some physiological traits of cuttings during rooting

67%

Nowak J., Nowak J. S.

Acta Scientiarum Polonorum. Hortorum Cultus

|

2013

|

tom 12

|

nr 6

Propagation conditions of bedding plants can eliminate or reduce the possibility of AMF inoculation of the root system during greenhouse production. Due to the ability of AMF to increase plant growth the effects of AMF and CO₂ enrichment on rooting and some physiological traits of geranium and osteospermum cuttings were investigated. AMF and CO₂ enrichment increased leaf number and fresh and dry weights of osteospermum shoots. Mycorrhization also significantly increased the length and fresh and dry weights of osteospermum roots formed in CO₂ enriched atmosphere but it did not affect root system developed in ambient atmosphere. AMF increased the length and fresh weight of geranium roots, irrespectively of CO₂ concentration, and dry weight of roots in CO₂ enriched atmosphere. Transpiration and stomatal conductance values were higher in inoculated osteospermum at higher CO₂ concentration. Mycorrhization and CO₂ enrichment increased photosynthetic activity of garden geranium leaves and this effect was connected with the increased ratio of variable to maximum chlorophyll fluorescence (Fv/Fm).

8

Effect of drought and re-watering on the metabolomic profile and antioxidant response of eucalyptus plants

67%

Pinto G., Correia B., Dias C., Silva S., Santos C., Valledor L.

BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology

|

2013

|

tom 94

|

nr 2

9

Effect of water deficit on gas exchange parameters, productivity and grain wholesomeness of spring wheat

67%

Olszewski J., Pszczolkowska A., Makowska M., Kulik T., Okorski A.

Polish Journal of Natural Sciences

|

2009

|

tom 24

|

nr 2

85-92

The rate of photosynthesis and transpiration, intercellular CO₂ concentration and stomatal conductance in spring wheat plants were determined in an experiment conducted during the years 2004–2005. The severity of fungal infection of wheat kernels was estimated by a traditional method and a molecular BIO-PCR technique with the use of universal and SCAR primers. It was found that water deficit decreased thousand grain weight, grain weight per plant and the values of gas exchange parameters (including photosynthesis, transpiration, stomatal conductance, intercellular CO₂ concentration), in particular photosynthesis. The values of biometric characters did not decrease. The rate of wheat grain colonization by fungal pathogens was slightly higher under water stress conditions.

10

Physiological activity of common osier (Salix viminalis L.) under copper-induced stress conditions

67%

Malinowska K., Wrobel J.

Acta Agrophysica

|

2015

|

tom 22

|

nr 2

The study examined the influence of copper salt at concentrations ranging from 50 to 250 mg dm-3 on the physiological reaction of the Bjor and Jorr varieties of common osier. The content of assimilation pigments, the intensity of CO2 assimilation, transpiration, stomatal conductance for CO2 and water vapour, coefficients of the relative water content and water saturation deficit were determined. The intensity of CO2 assimilation, transpiration and the assimilation pigment content in the tested common osier cultivars varied with relation to the copper salt dose in the medium. A decrease in the intensity of the tested physiological parameters was found together with an increase in the copper salt dose in the medium. CO2 assimilation and transpiration of the Bjor and Jorr osier was significantly limited by the stomata. The addition of copper salts to the medium resulted in an increase in the water saturation deficit in leaves of the tested common osier varieties.

11

Effect of preceding temperature and subsequent conditions on response of tomato plants to chilling

67%

Starck Z., Choluj D., Niemyska B.

Acta Physiologiae Plantarum

|

1994

|

tom 16

|

nr 4

12

Comparative effects of heat stress on photosynthesis and chloroplast ultrastructure in tomato plants with source-sink modulated by growth regulators

67%

Starck Z., Wazynska Z., Kucewicz O.

Acta Physiologiae Plantarum

|

1993

|

tom 15

|

nr 2

13

Accumulation of cesium in leaves of Lepidium sativum and its influence on photosynthesis and transpiration

67%

Bystrzejewska-Piotrowska G., Urban P. L.

Acta Biologica Cracoviensia. Series Botanica

|

2003

|

tom 45

|

nr 2

The study examines the transfer factor (TF) for cesium in a soil-plant system and cesium accumulation in cress Lepidium sativum L. plants grown in hydroponic culture and subjected to root and foliar application of 0.3 mM CsCl. The experiments showed a high TF for radiocesium: 2.97 (kBq/kg plant DW)/(kBq/kg soil DW). High accumulation of cesium was observed in leaves after both root and foliar treatments. A higher concentration of cesium (3 mM) caused significant disturbance in water uptake, tissue hydration (FW/DW) and production of biomass (DW). Accumulation of cesium in leaves affected gas exchange parameters. Stomatal conductance (C) and transpiration rate (E) were strongly inhibited but photosynthetic CO2 assimilation (P) was disturbed to a lesser extent. As a result, photosynthetic water utilization efficiency (P/E) was unaffected by 3 mM cesium at photosynthetically active radiation (PAR) of 220 µmol x m-2 x s-1. Increasing PAR from 220 to 450 µmol x m-2 x s-1 stimulated the photosynthetic rate after 3 days, but no stimulation was observed after 5 days of cesium treatment, in comparison with potassium-grown plants. Changes in chlorophyll fluorescence, indicating maximal quantum yield of photosystem II (PSII) photochemistry, were observed only as a late stress effect. Decreased stomatal opening was an early effect of cesium stress in Lepidium sativum, which resulted in limitation of transpiration and water uptake. It is suggested that the decrease in tissue hydration is what limits photosynthetic CO2 assimilation, synthesis of organic matter and light reactions of photosynthesis.

14

Diversified response to drought of light exposed and shaded leaves of potted grapevine, peach and pear trees

67%

Neri D., Castagnoli M., Poni S., Corelli L.

Journal of Fruit and Ornamental Plant Research

|

2003

|

tom 11

15

The effect of nitrogen form and air temperature during foliar fertilization on gas exchange, the yield and nutritive value of spinach (Spinacia oleracea L.)

59%

Borowski E., Michalek S.

Folia Horticulturae

|

2008

|

tom 20

|

nr 2

16

Wstępne badania aktywności fotosyntezy jednorocznych roślin wybranych odmian winoroślin

59%

Borowiak K., Korszun S.

Biuletyn Instytutu Hodowli i Aklimatyzacji Roślin

|

2011

|

nr 259

Ograniczanie wyników

Environmental factors-induced stomatal signalling

Diurnal dynamics of stomatal conductance and leaf temperature of grapevines (Vitis vinifera L.) in response to daily climatic variables

Constitutively active guard cell plasma membrane Hplus-ATPase impairs ozone – elevated CO2־ and darkness-induced stomatal closur

Effect of tropospheric ozone on photosynthetic activity of ozone-resistant and ozone-sensitive test plants (Nicotiana tabacum L., Phaseolus vulgaris L.)

The effect of irrigation frequency on growth, flowering and stomatal conductance of osteospermum Denebola and New Guinea impatiens Timor grown on ebb-and-flow benches

Effect of different soil water potential on leaf transpiration and on stomatal conductance in poinsettia

CO2 enrichment and mycorrhizal effects on cutting growth and some physiological traits of cuttings during rooting

Effect of drought and re-watering on the metabolomic profile and antioxidant response of eucalyptus plants

Effect of water deficit on gas exchange parameters, productivity and grain wholesomeness of spring wheat

Physiological activity of common osier (Salix viminalis L.) under copper-induced stress conditions

Effect of preceding temperature and subsequent conditions on response of tomato plants to chilling

Comparative effects of heat stress on photosynthesis and chloroplast ultrastructure in tomato plants with source-sink modulated by growth regulators

Accumulation of cesium in leaves of Lepidium sativum and its influence on photosynthesis and transpiration

Diversified response to drought of light exposed and shaded leaves of potted grapevine, peach and pear trees

The effect of nitrogen form and air temperature during foliar fertilization on gas exchange, the yield and nutritive value of spinach (Spinacia oleracea L.)

Wstępne badania aktywności fotosyntezy jednorocznych roślin wybranych odmian winoroślin