Wyniki wyszukiwania - AGRO

1

Regulation of gene expression by endogenous ABA in tomato plants

100%

Bray E. A., Cohen A., Plant A. L., Moses M. S., Imai R., Griffiths A.

Acta Physiologiae Plantarum

|

1997

|

tom 19

|

nr 4

In response to water deficit, endogenous abscisic acid (ABA) accumulates in plants. This ABA serves as a signal for a multitude of processes, including regulation of gene expression. ABA accumulated in response to water deficit signals cellular as well as whole plant responses playing a role in the pattern of gene expression throughout the plant. Although the function of genes regulated by ABA during stress are currently poorly understood, a number of these genes may permit the plant to adapt to environmental stress.

2

Developmental stability of the mink Mustela vison under the impact of PCB

100%

Borisov V. I., Baranov A. S., Valetsky A. V., Zakharov V. M.

Acta Theriologica. Supplement

|

1997

|

nr 04

Females of the American mink Mustela vison Schreber, 1777 were fed on various fractions of comercial PCB. Developmental stability of their progeny was studied. Developmental stability was measured by the value of fluctuating asymmetry, and the frequency of phenodeviants of osteological and dermatoglyphic characters. All these measures proved to be significantly higher in the experimental intoxicated groups than in the control group, thus indicating deterioration of developmental stability from PCB.

3

Effect of light and chill on the physiological state of cucumber plants regenerated in vitro cultures

100%

Murkowski A., Burza W., Skorska E.

Acta Physiologiae Plantarum

|

1997

|

tom 19

|

nr 2

4

Vulnerability of sun and shade canopy leaves under natural environmental stresses

86%

Repkova J., Brestic M.

Acta Physiologiae Plantarum

|

2007

|

tom 29

|

nr 1 Suppl.

5

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

Evaluation of canola chlorophyll index and leaf nitrogen under wide range of soil moisture

86%

Meskini-Vishkaee F., Mohammadi M. H., Neyshabouri M. R., Shekari F.

International Agrophysics

|

2015

|

tom 29

|

nr 1

The paper presents a study on the effect of soil matric suction on the variation of leaf chlorophyll index and nitrogen concentration of canola. Results showed that chlorophyll index increases exponentially with soil matric suction, especially at the late season of canola growing time. At moderate matric suction (200 and 300 kPa soil suction heads), chlorophyll index remains nearly constant, but in drier soil (matric suction >300 kPa),chlorophyll index increases gradually with time. Despite the va-riation of the total leaf nitrogen with the soil matric suction, it is similar to the variation of the chlorophyll index, but the results showed that the chlorophyll index – nitrogen concentration curve has a de-marcated bi-modal shape. We suggest that 2.7% of nitrogen and 69.8 of the chlorophyll index value represent the upper limit of the chlorophyll meter reliability for estimation of canola nitrogen under a wide range of soil moisture levels. These results confirm that the chlorophyll meter can be used as an effective tool for rapid and non-destructive estimation of the relative chlorophyll and nitrogen content in canola leaves at a wide range of soil moisture content, except for nearly wilting coefficient or extremely high drought stress.

6

Nitrogen fixation in agriculture: perspectives

86%

Legocki A. B.

Biotechnologia

|

1996

|

nr 1

7

The impact of environmental stress on Listeria monocytogenes virulence

72%

Walecka E., Molenda J., Bania J.

Polish Journal of Veterinary Sciences

|

2009

|

tom 12

|

nr 4

Listeria monocytogenes, a significant food-borne pathogen, must defy a variety of conditions encountered in the food environment and during the infection process. In reaction to adverse conditions, the bacteria significantly change their metabolism, inducing a stress response which is mediated by a range of alternative sigma factors. The extent of the response to stress was shown to vary in the L. monocytogenes population. According to recent evidence a major L. monocytogenes alternative sigma factor, designated sigma B (σB), regulates some virulence genes in response to stress, which supports an older hypothesis that stress-resistant strains should be more pathogenic. The induction of σB-dependent genes may also be important from the point of view of food hygiene. It seems that stress response activation can paradoxically enhance resistance to agents used in food preservation. Therefore, monitoring the expression of σB-dependent genes can serve as a useful marker to assess the innate resistance of L. monocytogenes strains. This knowledge will allow the design of new methods with sequential preservation steps that could inactivate the bacteria without inducing their stress response.

8

The role of 24-epibrassinolide induced antioxidant defence during germination under salinity in chickpea

72%

Yalcinkaya T., Turkan I., Sekmen A., Ozgur R.

BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology

|

2013

|

tom 94

|

nr 2

9

Environmental stress increases plasma tumor necrosis factor and decreases interferon gamma levels in rats

72%

Wrona D., Zander A., Slominska L., Grembecka B.

Acta Biologica Cracoviensia. Series Zoologia

|

2008

|

tom 50

29-36

10

Photosystem II stability in relation to osmotic and antioxidative response in wheat plants subjected to environmental stress

72%

Ferus P., Repkova J., Zivcak M., Olsovska K., Brestic M.

Acta Physiologiae Plantarum

|

2007

|

tom 29

|

nr 1 Suppl.

11

Oxidative stress responses are regulated by heat shock factor HSFA4A in Arabidopsis

72%

Perez Salamo I., Papdi C., Rigo G., Zsigmond L., Vilela B., Pages M., Nagy I., Domoki M., Darula Z., Koncz C., Szabados L.

BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology

|

2013

|

tom 94

|

nr 2

12

Protective function of foliar anthocyanins: in situ experiments on a sun-exposed population of Iris pumila L. [Iridaceae]

72%

Tucic B., Vuleta A., Manitasevic Jovanovic S.

Polish Journal of Ecology

|

2009

|

tom 57

|

nr 4

779-783

Anthocyanins are a group of water-soluble flavonoids known for their protective role against photoinhibitory and photooxidative damage to leaf cells under environmental stress. The effects of variation in light quantity on rates of anthocyanin production in foliage of Iris pumila were evaluated spectrophotometrically in a field experimental setting accomplished by shielding one half of each examined plant with a 65% neutral-density shade, whereas the other half experienced full sunlight. In unshaded leaves, the average anthocyanin level increased by 55.3% compared to their shaded counterparts. Because there was no a significant difference in the average level of pheophytin (a breakdown product of chlorophyll) between unshaded and shaded leaves, the results suggested that the elevated anthocyanin concentrations in sun-exposed foliage of I. pumila could act as a light attenuator, protecting its chloroplasts from excess high-energy quanta that would otherwise be intercepted by the chlorophylls.

13

Effects of physiological integration and phosphorus on spread of Alternanthera philoxeroides from soil to chromium-contaminated aquatic habitats

72%

Xu L., Wu X.

Polish Journal of Ecology

|

2018

|

tom 66

|

nr 4

Aquatic ecosystems are receivers for various pollutants, for instance, Chromium (Cr, one of the toxic heavy metals) and phosphorus (one of the biggest causes of water eutrophication). Such contaminants have brought serious impact on health and security of aquatic ecosystems. Physiological integration between the integrated ramets of clonal plants can increase their tolerance to environmental stress. It is hypothesized that physiological integration and phosphorus could facilitate the expansion of amphibious clonal plants from soil to Cr-polluted aquatic habitats. This study was conducted to primarily examine how physiological integration and phosphorus affected the effects of Cr on plant growth and population expansion. An amphibious clonal herbaceous plant Alternanthera philoxeroides was used to simulate the spread process by induced stolon connection or disconnection, Cr pollution and different levels of phosphorus in aquatic habitats. We found that Cr pollution deployed to apical ramets directly decreased the growth and photosynthetic parameters of the apical ramets that lacked connections to the basal ramets, but these effects could be mitigated by stolon connections. Cr pollution had no effects on these disconnected basal ramets, but the transmission of Cr from the apical parts via connected stolons negatively affected the growth of the basal ramets. Increasing the phosphorus not only increased the growth but also decreased the levels of Cr that accumulated in the plant tissues and the bioactivity of Cr. These results indicated that increasing the phosphorus could benefit the population expansion and establishment of A. philoxeroides through physiological integration from terrestrial to Cr-polluted aquatic habitats.

14

Influence of abiotic stress during soybean germination followed by recovery on the phenolic compounds of radicles and their antioxidant capacity

72%

Swigonska S., Amarowicz R., Krol A., Mostek A., Badowiec A., Weidner S.

Acta Societatis Botanicorum Poloniae

|

2014

|

tom 83

|

nr 3

Abiotic stress factors are among the major causes of lower crop yields. It is known, that in response to cold and/or osmotic stress, crops activate various defense mechanisms, including morphological, physiological and metabolic adaptations. Secondary metabolism, especially phenolic compounds, seem to be an important factor of stress-induced metabolic re-engineering as their levels are alternated by abiotic stress in plants. Despite the fact, that the nature and function of phenolic compounds was already studied in various plant species, it is important to define tissue-specific changes induced by two most potent abiotic stressors – low temperature and decreased water potential. Moreover, in fields, the appearance of single stress is rather rare. Usually two or more factors are acting in parallel, which may potentially result in different effects. Therefore, the aim of this study was to analyze selected elements of secondary metabolism in roots of germinating soybean seeds under cold stress, osmotic stress and both stresses combined. In addition the effects of constant and persistent stress were compared to those induced by sudden and brief stress appearance, as well as after the post-stress recovery process. In the presented study standard methods for identification and quantification of phenolic acids and isoflavones were used and the antioxidant capacity of the radicle extracts was measured. The phenolic metabolism in plants was greatly intensified in response to cold and osmotic stress and remained at high level during the post-stress recovery. The amount and composition of both phenolic acids and identified isoflavones also changed in stress- and duration-dependent manner. This proves an important role of phenolic compounds in abiotic stress response of germinating soybean seeds and opens up new perspectives for further investigations.

15

MiR396 involvement in regulation of somatic embryogenesis in Arabidopsis

72%

Szczygiel-Sommer A., Gaj M. D.

BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology

|

2013

|

tom 94

|

nr 3

16

Histone modifications under environmental stress

72%

Pawlak S., Deckert J.

Biological Letters

|

2007

|

tom 44

|

nr 2

65-73

17

The role of PsbS and chloroplast retrograde signaling in regulation of various Darwinian fitness traits in Arabidopsis

72%

Karpinski S. M.

BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology

|

2013

|

tom 94

|

nr 3

18

The effect of low temperature on the plasma membrane oxidoreductase activity in cucumber seedlings

72%

Janicka-Russak M.

Acta Physiologiae Plantarum

|

2007

|

tom 29

|

nr 1 Suppl.

19

Assessment of plant growth-promoting stress-tolerant endophytes screened from Bougainvillea glabra for the growth of Triticum aestivum L. and Zea mays

72%

Karnwal A.

BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology

|

2020

|

tom 101

|

nr 1

20

Secondary metabolites in the response of model Brassicaceae species to Plectosphaerella cucumerina

72%

Kulak K., Bednarek P.

BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology

|

2013

|

tom 94

|

nr 3

Ograniczanie wyników