Wyniki wyszukiwania - AGRO

1

The role of cell walls in adaptation of plants to moderate water deficit

100%

Nedukha O. M.

Acta Physiologiae Plantarum

|

2007

|

tom 29

|

nr 1 Suppl.

2

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.

3

Investigating the molecular basis of desiccation tolerance using the resurrection plant Craterostigma plantagineum as an experimental system

100%

Bartels D., Chandler J., Bockel C., Frank W., Kleines M., Rodrigo M. J., Phillips J., Mariaux J. B., Furini A., Salamini F.

Acta Physiologiae Plantarum

|

1997

|

tom 19

|

nr 4

The array of genes isolated and characterised from Craterostigma to date allow many insights to be made into the protection mechanisms underlying the desiccation tolerance phenomenon and drought-induced changes in gene expression. However, more work is necessary to define which gene products positively contribute to stress tolerance and which may be considered as secondary stress metabolites or as gene regulators. It is apparent that the gene regulatory mechanisms involved are complex, but future work with more refined biochemical and genetic approaches, together with the analysis of defined mutants will greatly help to dissect the important area of desiccation perception, perhaps faciliate manipulation of desiccation tolerance in a genetic engineering context, and undoubtedly bring much progress in the coming years.

4

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

Niedobory wodne użytków zielonych w różnych rejonach północnej Polski

86%

Labedzki L.

Zeszyty Problemowe Postępów Nauk Rolniczych

|

1990

|

tom 387

В статье проводится оценка дефицитов воды для трехкосных лугов в некоторых районах северной части Польши. Оценка основывается на декадных водных балансах почвы. Дефициты воды исчисляли после исчерпания легко доступной растениям воды. В северо-западной части Польши луга на почвах с хорошим влагозадержанием должны орошаться с июля по сентябрь, а на почвах со слабым влагозадержанием - уже с мая. В северо-восточной части страны луга на почвах с значительной влагоемкостью не нуждаются в орошении, а на почвах с небольшой влагоемкостью должны орошаться с июля.

5

The effect of water deficit and UV-B radiation on oxidative stress markers and growth parameters in barley seedlings

86%

Paczkowska M., Bandurska H.

Acta Physiologiae Plantarum

|

2007

|

tom 29

|

nr 1 Suppl.

6

Modelling of leaf temperature and transpiration as a function of soil water potential

86%

Olszta W., Wiszniewska-Oraczewska I.

Zeszyty Problemowe Postępów Nauk Rolniczych

|

1996

|

tom 436

The empirical verification of TRANSP and TERGRA models was the main purpose of conducted researches. The models introduced in this paper describe the diurnal patterns of leaf temperature and transpiration when grass is exposed to increasing water deficit under field conditions. The difference simulation results of leaf water potential, leaf temperature and transpiration flux for low and high soil water potential rates and for different meteorological conditions show that these models need more research and measurements for a better identification of function aqd parameters especially for wet conditions, making these models more useful for irrigation scheduling, using the remote sensing techniques.

7

Water availability in reference to water needs in Poland

86%

Orlinska-Wozniak P., Wilk P., Gebala J.

Meteorology Hydrology and Water Management. Research and Operational Applications

|

2013

|

tom 01

|

nr 1

On Earth water is an irreplaceable asset, and an estimate of its resource capacity is necessary. The improper selection of indicators of water resources can lead to the underestimation or overestimation of the actual resources present. Incorrect assessments of water resources contribute to the improper completion of necessary water management tasks, thereby failing to satisfy the needs of different water users such as industry, agriculture and forestry, inland water navigation, tourism and recreation and the general population for the purposes of municipal water use. This article discusses the advantages of utilizing Earth Observation technology for estimating water resources in Poland. Despite the large amount of water on Earth, decades of wrongly pursued water management have led to a critical point in maintaining this valuable resource. According to actual estimations, there are enough fresh water resources in the world; the problem is the uneven distribution and pollution of these resources, especially in the case of surface water. Currently, Poland, in comparison with other European countries, is classified as a country with very little water resources. It is important, however, that a thorough evaluation using the latest measurement technologies is conducted, particularly for groundwater resources in deep layers of the lithosphere. The proper assessment of water resources requires knowledge of the hydrogeological conditions within each of the catchments of the analyzed area. International data sets are mostly incomplete and heterogeneous, which makes the comparison of data of several years difficult and often leads to mistakes. While analyzing Polish water resources several factors should be taken into account, including: the amount of rainfall, the amount of water in rivers, lakes and groundwater, and the above-mentioned factors affecting the measurement of the amount of disposable water resources. This article is an introduction to the broader analysis of water resources in Poland and an exploration of the issue from a different perspective.

8

Estimation of irrigation needs against the background of climatic conditions changeability in the mid-Wielkopolska region

86%

Przybyla C., Kapuscinski J.

Roczniki Akademii Rolniczej w Poznaniu. Melioracje i Inżynieria Środowiska

|

2002

|

tom 22

97-106

9

Distribution of calcium ions in Sium latifolium root cells affected by moderate water deficit

86%

Sobol M. A., Kordyum E. L.

Acta Physiologiae Plantarum

|

2007

|

tom 29

|

nr 1 Suppl.

10

Alcohol dehydrogenase expression in aerial-aquatic plants in response to different water environment

86%

Kozeko L., Ovcharenko Y., Kordyum E.

Zeszyty Problemowe Postępów Nauk Rolniczych

|

2008

|

tom 524

Alisma plantago-aquatica L. (Alismataceae) and Sium latifolium L. (Apiaceae) can grow both under flooding and moderate water deficit. Activity of alcohol dehydrogenase (ADH) plays a critical role in the metabolism of plants under hypoxia participating in fermentation of sugars to ethanol - the primary mechanism of energy production in hypoxic roots. This study was aimed to characterize localization of ADH activity and its isozyme spectrum in roots of the aerial-aquatic and terrestrial plants. Cytochemical localization revealed that the ADH activity was associated with the root tip in aerial-aquatic plants. The ADH spectrum consisted of two isozymes in the A. plantago-aquatica roots and three isozymes in the S. latifolium ones. At the same time ADH activity was not observed in the roots of terrestrial plants. However, the weak ADH activity appeared in the roots of terrestrial plants after temporary flooding in time-dependent manner. The established changes in ADH gene expression in different water environment demonstrate its significant role in plant phenotypic plasticity.

11

Phenotypic plasticity of European beech (Fagus sylvatica L.) stomatal features under water deficit assessed in provenance trial

86%

Stojnic S., Orlovic S., Trudic B., Zivkovic U., von Wuehlisch G., Miljkovic D.

Dendrobiology

|

2015

|

tom 73

The results of research into leaf stomatal variability of five European beech provenances originating from Austria, Bosnia and Hercegovina, Germany, Romania and Serbia are presented in this paper. Aim of the study was to investigate how stomatal traits of provenances originating from different environments change in response to drought stress and to assess the phenotypic plasticity of the stomatal features investigated. The study was conducted during two different years, characterized by contrasting weather conditions (2010 and 2011). Two-way ANOVA revealed that provenances differ significantly in terms of stomatal density (SD), width of stomatal aperture (Wb), potential conductance index (PCI) and relative stomatal pore surface (RSPS), during both seasons. In a dry year (2011) all provenances significantly increased stomatal density by between 16.1% (Hasbruch – DE) and 21.9% (Cer – SRB). Guard cell length (LA) was not statistically different among provenances in either year (2010 and 2011), even though LA decreased in the dry year (2011) in all provenances. Reaction norms were steep in most of the parameters suggesting the possibility of a plastic response of provenances toward changes in soil water regime, influenced by the prevailing weather each year. Phenotypic plasticity indices were the highest in regards of SD, PCI and RSPS, indicating that these traits would be good candidates for improvement in breeding programs aimed at selection of drought resistant.

12

Comparison of water needs of true millet in the region of Bydgoszcz and Wroclaw

86%

Rolbiecki S., Chmura K.

Infrastruktura i Ekologia Terenów Wiejskich

|

2015

|

nr III/2

13

Superoxide dismutase and peroxidase activities in drought sensitive and resistant barley [Hordeum vulgare L.] varieties

86%

Acar O., Turkan I., Ozdemir F.

Acta Physiologiae Plantarum

|

2001

|

tom 23

|

nr 3

14

Calorimetric studies of pea [Pisum sativum L.] growing during the state of water deficit in soil

86%

Dziejowski J., Fordonski G., Olszewski J.

Polish Journal of Natural Sciences. Supplement

|

2003

|

tom 01

15

Leaf rolling effects on lipid and fatty acid composition in Ctenanthe setosa [Marantaceae] subjected to water-deficit stress

86%

Ayaz F. A., Kadioglu A., Dogru A.

Acta Physiologiae Plantarum

|

2001

|

tom 23

|

nr 1

16

Implication of ABA and proline on cell membrane injury of water deficit stressed barley seedlings

86%

Bandurska H.

Acta Physiologiae Plantarum

|

1998

|

tom 20

|

nr 4

The aim of this work was to examine the ability of ABA and proline to counteract the deleterious effect of water deficit stress on cell membrane injuries. Six-day-old seedlings of two barley genotypes (cv. Aramir, line R567) were treated with ABA (2·10⁻⁴ M) or proline (0.1 M) for 24 h, and then subjected to osmotic stress for 24h, by immersing their roots in polyethylene glycol (PEG 6000) solution of osmotic potential of −1.0 MPa and −1.5 MPa or by submerging the leaf pieces in PEG solution of osmotic potential of −1.6 MPa. Pretreatment of plants with ABA and proline caused an increase of free proline level in the leaves. Plants treated with ABA exhibited a lower membrane injury index under water stress conditions than those untreated even when no effect of this hormone on RWC in the leaves of stressed plants was observed. Pretreatment of plants with proline prevented to some extent membrane damage in leaves of the stressed seedlings, but only in the case when stress was imposed to roots. Improvement in water status of leaves was also observed in seedlings pretreatment with proline. The protective effect of both ABA and proline was more pronounced in line R567 that exhibited higher membrane injury under water deficit stress conditions.

17

ATP-dependent proteolysis contributes to the acclimation-induced drought resistance in spring wheat

86%

Zagdanska B., Wisniewski K.

Acta Physiologiae Plantarum

|

1998

|

tom 20

|

nr 1

The effect of water deficit on the ATP-dependent proteolysis and total protein degradation was estimated in the leaves of spring wheat (Triticum aestivum L.) acclimated and non-acclimated to drought. The rate of ATP-dependent proteolysis, quantified as a difference between degradation of ¹²⁵I-lysozyme under ATP-regenerating and ATP-depleting systems, accounted for about 55 % of total ¹²⁵I-lysozyme degradation in fully turgid wheat leaves. In the non-acclimated leaves dehydration decreased sharply ATP-dependent proteolysis catalyzed by proteasome down to about 5% while in the leaves acclimated to drought water deficit raised ATP-dependent proteolysis to 87 % of total 125I-lysozyme hydrolysis.

18

Variation of chemical composition of tubers of potato table cultivars grown under deficit and excess of water

86%

Mazurczyk W., Lis B.

Polish Journal of Food and Nutrition Sciences

|

2001

|

tom 10

|

nr 2

Average chemical composition of mature tubers of 97 Polish potato table cultivars is presented. Each variety was cultivated for at least 3 years at the Experimental Station in Jadwisin, near Warsaw. About 25 cultivars were grown each year between 1974 and 1997 on light loamy sand with the same agricultural practices, without irrigation or chemical control of diseases. Contents of dry matter and starch were the most stable with mean variability coefficients (V) 8.4 and 8.8%, respectively. The least stable components were concentrations of total sugar (V=34.2%) and reducing sugar with V reaching about fifty percent. Wet vegetation conditions worsened tuber chemical composition (less dry matter, starch, protein and ascorbic acid) as compared with dry or intermediate ones.

19

Functional and biochemical characterization of Arabidopsis calcium sensor SCS a potential regulator of SnRK2 protein kinases

72%

Bucholc M., Goch G., Ciesielski A., Anielska-Mazur A., Dobrowolska G.

BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology

|

2013

|

tom 94

|

nr 2

20

Effects of continuous and periodic water stress on cold hardiness of rhododendron cultivars

72%

Koniarski M., Matysiak B.

Zeszyty Problemowe Postępów Nauk Rolniczych

|

2017

|

tom 588

The purpose of the present study was to determine whether water deficit affects cold hardiness of rhododendron ‘Catawbiense Boursault’, ‘Lee’s Dark Purple’, ‘Prinz Karneval’ and ‘Old Port’ shrubs. Plants were grown in unheated greenhouse and for 14 weeks from June to mid-September were subjected to six irrigation treatments. In the end of September shrubs were left in an unheated greenhouse or planted into the ground and at the beginning of each month from December to March freezing tolerance tests were performed. The results showed that in all rhododendron cultivars the highest cold hardiness was noted in January and February, lower in March but the lowest in December. Application of four-week water deficit period during summer especially between the first and the second vegetative growth may improve the frost resistance of Rhododendron shrubs.

Ograniczanie wyników