responses of organisms to water stress

... resource scarce areas are sensitive to that Potential adaptability to freshwater Responses of Organisms to Water Stress consumption in the physical aspect of freshwater resources is reflected in ... freshwater consumption may cause several types of effects on ecosystem However, any 10 Responses of Organisms to Water Stress consensus on cause-effect chain of freshwater consumption related to ... stomatal behaviour in response to situations of drought stress may be indicative of water use efficiency for the production of photosynthates Exposure to stress may induce alterations in photobiological...

Ngày tải lên: 06/03/2014, 23:20

... therefore a useful tool to study physiological consequences of drought on photosynthetic electron transport To test responses of different oak species to a combination of water stress and high irradiance, ... rates of g and A may be due to CO w limitation of A and supra-optimal stomatal conductance on well-watered seedlings Drought effects on photochemical efficiency of PS II Responses of maximal photochemical ... controls Responses of photochemical efficiency to increasing PFD and susceptibility to high light stress were studied on 3-4 leaf disks (10 cm ) punched from either well-watered or waterstressed...

Ngày tải lên: 08/08/2014, 19:21

... (Fig 2) Response of older seedlings to water stress Osmotic potentials of seedlings from all provenances were lowered similarly (by 0.1-0.3 MPa) by water and nutrient stress Water use efficiency ... correlates with water- use efficiency of wheat genotypes Aust J Plant Physiol 11, 539-552 Gibson A & Bachelard E.P (1987) Provenance variation in germination response to water stress of seeds of some ... differed in stress- induced changes in the partitioning of dry matter into roots, stems and leaves (Fig 5) Stressed Tennant Creek seedlings allocated more dry matter into leaves at the expense of roots,...

Ngày tải lên: 09/08/2014, 04:20

... decisive factor [2] Measuring water potential and its components is one of the best tools to study plant response to drought [29] Pressure-volume curves method allow to measure such components together ... Fluka) was added to the nutrient solution, so as to reach water potentials of –0.4, –0.8, –1.2 and –1.6 MPa, according to the formula proposed by Michel [26] The water potential of the control ... measuring initial water potential (Ψ) and actual percentage of water content (WC), the osmotic potential at full turgor (Ψπ100), the percentage of apoplastic water (B), the percentage of water deficit...

Ngày tải lên: 08/08/2014, 14:20

... effect of temperature, water stress and seed size on germination of E globulus a) Effect of temperature on germination capacity of an unsorted lot b) Effect of temperature on germination rate of ... of water penetration into seeds is critical to the success of germination A higher speed in imbibition was recorded for higher temperatures and larger sizes, what led to a faster protrusion of ... Effect of osmotic and matric potentials on the availability of water for seed germination, Aust J Biol Sci 24 (1971) 423-431 [20] Michel B.E., Evaluation of the water potentials of solutions of polyethylene...

Ngày tải lên: 08/08/2014, 14:22

... measurement of the various components of nonstomatal responses to differentiate the relative importance of these responses to stress (Epron and Dreyer, 1993a) Nonstomatal photosynthetic mechanisms Photosynthetic ... FIXATION AND WATER STRESS Physiological responses to moisture stress associated with carbon fixation can be conveniently divided into stomatal and nonstomatal responses Trees under moisture stress ... mechanisms Measurements of changes in stomatal conductance and pho- tosynthetic rates can divide photosynthetic response into stomatal and nonstomatal responses Various nonstomatal responses, such as...

Ngày tải lên: 08/08/2014, 18:21

... Long-term water stress had no effect on supply of essential nutrients to the trees This work !nn- - No symptoms typical of forest decline observed were Conclusions Both tures a better water stress tolerBoth ... degree of reduction depended pri- upon intensity of water stress but also modified by water vapor saturation deficit (WSD) and the level of the turgor loss point (Figs 1, 2) In contrast to experiments ... under conditions of limited water supply, indicating different kinetics for C0 and water vapor diffusion or sto2 matal conductance (cf Larcher, 1960) Under conditions of good water supply, Douglas...

Ngày tải lên: 09/08/2014, 04:20

... to modulation of cytokine gene transcription A key transcription factor involved in the up-regulation of many cytokines and other mediators essential to host defense is nuclear factor (NF)κB [24] ... reported to be involved in inflammatory mediator production in response to a wide variety of microbial stimuli For example, ERK activation is involved in response to Salmonella infection of macrophages ... signalling pathways that lead to production of potentially lethal mediators [8] The ability of host factors to overcome these mycobacterial strategies is the focus of the current study The initial...

Ngày tải lên: 12/08/2014, 14:20

... in the response of C jejuni to cadmium stress that are unique to it as well as others that are common with the responses of other bacteria The modulation of expression of enzymes of fatty acid ... other organisms subjected to metal stress [26] Oxidative phosphorylation generates high-energy ATP, and upregulation of the expression of this synthase may serve to offset the downregulation of ... leading to elevated concentrations of reduced ferredoxin, and the upregulation of a putative cytochrome c encoded by cj0037c are important responses to cadmium ions that may act as detoxification...

Ngày tải lên: 23/03/2014, 06:20

... 20] as water stress limits both carbon and nitrogen gain [42] The aim of the present study was to assess the combined response of growth, carbohydrate and nitrogen reserves of seedlings of three ... in response to fertilization, whereas Npool only increased from LF to MF in Q ilex and in Oak seedlings responses to nutrient and water 205 Figure Effects of fertilization (left) and watering (right) ... Stpool -[St] trajectory in response to an increase of water Oak seedlings responses to nutrient and water 207 Figure Effects of fertilization (left) and watering (right) on plant nitrogen concentration...

Ngày tải lên: 07/08/2014, 16:20

... height of 1.5–2.5 m from the ground in the evening hours of the day previous to the day of the measurement, sealed in a polythene bag to reduce evaporative loss of water and taken to the laboratory ... maxima at the beginning of August The main aim of the research was to assess the extent of osmoregulation in L decidua and the compared responses to water availability of two co-occurring evergreen ... transpiration were not estimated because of the uncertainty in defining the number of active tree rings and the contribution of each of them to the total water transport 2.4 Hydraulic resistance...

Ngày tải lên: 08/08/2014, 14:22

... size led to an increase in the susceptibility of the seedlings to water stress; and 2) to determine the relative importance of soil and atmospheric drought in the generation of drought stress in ... seedlings, grown to different sizes in different types of containers, were subjected to sets of atmospheric environmental conditions and levels of soil water availability Our objectives were ) to determine ... planting stock (Overton and Ching, 1978; Newton et al, 1993), because of its enhanced ability to capture light, and in some cases, to overcome browsing damage (Hartwell, 1973, in Newton et al,...

Ngày tải lên: 08/08/2014, 19:21

... consequences of these changes could then be assessed of Atmospheric pollution (especially ozone) has often been cited as a possible contributory factor in forest decline Furthermore, there is evidence to ... increased motor traffic Much work has thus been carried out to assess the biochemical and physiological response of trees to this pollutant, but the results have often been contradictory This may ... 10/25) To ensure that the beam of primary electrons did not penetrate other cells, layer of cells on a sheet of aluminium were analysed All measurements were made using an X-ray take-off angle of...

Ngày tải lên: 08/08/2014, 19:21

... of mature trees to drought was assessed using an imposed water shortage in a simplified lysimeter ysis of Seasonal time-course of water relations of both watered and droughted trees was monitored ... September 23 (d 266), a thunderstorm promoted a non-controlled and deep rewatering leading to an increase of leaf water potential During the greatest periods of stress, values of ψ and ψ were ... the loss of wm hydraulic conductivity is close to 30% Stomatal regulation was able to control the degree of embolism and to restrict it to this value for month, despite decreasing soil water availability...

Ngày tải lên: 08/08/2014, 23:22

Ngày tải lên: 08/08/2012, 17:20

... relating to Water Sector that helps translators being able to translate it effectively Methods of study The terms used in Water field would require a great amount of effort and time to study ... especially in Water Sector – a new developing sector in Vietnam The terminologies used in Water sector are not only ones relating to water but also technology, design, environment and waste water treatment ... storage tank Bể chứa ngầm Water- storage tank Bể trữ nước 22 3.2.4 Terms related to Environment The indispensable material in water sector obviously is water It is taken from sources: ground water, ...

Ngày tải lên: 11/12/2013, 23:55

... global monitoring of progress towards MDG 7 target to halve, by 2015, results of the global monitoring of progress towards MDG 77target C: to halve, by 2015, the global monitoring of progress towards ... indicators to assess performance of the instruments (China) This lack of monitoring tools to assess the performance of indicators will continue to impact the ability to measure progress with water ... state of freshwater resources, trends in inuseofthe resource base in in the various state of freshwater resources, trends use various on the state ofof freshwater resources,trendsinuse ofof theresource...

Ngày tải lên: 21/02/2014, 12:20

... et al Storz G & Zheng M (2000) Oxidative stress In Bacterial Stress Responses (Storz, G & Hengge-Aronis, R, eds), pp 47–59 ASM Press, Washington, DC Touati D (2000) Iron and oxidative stress ... presence of an electron donor, such as dithiothreitol (DTT), Fe3+ catalyses the reduction of O2 to H2O2, which is further converted to OH by the Fenton reaction [18] The MCO system causes damage to ... examined the role of Bcp2 in order to increase the knowledge of the enzymatic activity involved in the oxidative stress in S solfataricus To detect differences in the response to various agents...

Ngày tải lên: 07/03/2014, 12:20

... wastewater dumping into the water flows A possible indicator to assess the rate of water pollution caused by each sector is looking at the percentage of Chemical Oxygen Demand (COD), a major water ... capacity of pollutant load of water bodies, making proposals on the limit of total wastewater discharge, and providing guidance on the protection of drinking water resources” (Ministry of Water ... vital due to the urgency of China and Brazil to address the problem of water pollution in order to ensure access to health and higher living standards to their respective populations Much of the...

Ngày tải lên: 15/03/2014, 16:20

... different Yet, the release of both CHHs seems to be sensitive to dissolved oxygen in seawater, suggesting an adaptive role A single SG in the ES of Cal sapidus contains two isoforms of CHH The molecular ... release of CHH in the blue crab Glucose (ug/mL hemolymph) A 300 ** 200 100 22 to 22 22 to 29 22 to Temperature (°C) Lactate (ug/ mL hemolymph) B 180 *** 120 ** 60 * 22 to 22 22 to 29 22 to Temperature ... combination of LF2 and 3¢ nested primer (Invitrogen, Carlsbad, CA, USA), using the template from a touchdown product, generated an amplicon of  1.7 kbp The sequencing of the cloned vector of this...

Ngày tải lên: 16/03/2014, 06:20