One main focus of the GasLab is to assure the high accuracy of measurements of air samples from continuous atmospheric monitoring activities and targeted campaigns made by the department of Biogeochemical Systems.
Work performed for the department of Biogeochemical Processes mainly covers the analysis of soil air and samples taken during chamber experiments ( e.g. soil incubation andplant respirationstudies ) .
A key focus of the GasLab is therefore to ensure the correctness of measurement results from air samples that are continuously taken by the Biogeochemical Systems department at long-term observation stations and in targeted campaigns.
The Biogeochemical Processes department is supported by the analysis of soil air and air samples from chamber experiments (e.g. soil incubations or investigations of theplant respiration).
10.4161 / 15592324.2014.973822.
Using a cuvette for simultaneous measurement of net photosynthesis in above groundplantorgans and rootrespirationwe investigated the effect of reduced leaf glucokinase activity on plant carbon balance .
High levels of sucrose accumulating in leaves of the glucokinase mutant gin2-1 correlated with elevated root respiration during the light period.
10.4161 / 15592324.2014.973822.
With a measuring apparatus that allows the simultaneous measurement of photosynthesis in the shoot andbreathingin the root ofPlantallowed, it was investigated how a reduction in the activity of the enzyme glucokinase affects the sugar metabolism in plants.
The increase in sucrose concentration leads to increased root respiration, while at the same time the photosynthetic capacity increases because the splitting and resynthesis of sucrose in the leaves is reduced.
How is starch broken down ?
The remobilisation of starch fuelsrespirationandplantgrowth and development when photosynthesis is not possible .
This is necessary during the night when it is dark, during re-growth from roots or tubers in spring or after herbivory and during the germination of seeds.
How is starch broken down?
During periods when photosynthesis is not taking place, the breakdown of starch provides energy andcarbon frameworks, necessary for respiratory, growth and development processes of theplantare needed.
This is necessary at night when it is dark, during emergence from roots or tubers in spring or after pest infestation and during seed germination.
Cargo requires particular temperature, humidity / moisture and ventilation conditions :
This group includes in particular goods with 2nd order biotic activity ( BA 2 ) , i.e. living organs , in which respiration processes ( = externalrespiration) predominate in transit , as a result of their being cut off from the parentplantand ventilation must ensure gas exchange .
Goods require particular temperature, humidity/moisture and ventilation conditions:
In particular, this group includes goods with 2nd order biotic activity ( BA 2 ), i. H. living organs in which, as a result of detachment from themother plantduring transport, the respiratory processes ( = outerbreathing) predominate and the ventilation has to ensure gas exchange.
Electron Transport and Oxidative Phosphorylation : the Respiratory Chain
' The loss of substance that is generated incidentally by therespirationhas the aim to develop mechanical forces by which the atoms or molecules of the other substances are set in those motions that result in growth and other functions of the livingplant.
Oxidative phosphorylation - an electron transport chain
"The loss of substance caused by thebreathingis generated incidentally, has the purpose of developing mechanical forces, by which the atoms and molecules of the other substances are brought into those movements from which growth and the other functions of the livingplantresult.
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The contribution of rootrespirationto the carbon balance ofplantsis difficult to assess , because roots are covered by soil and associated with soil microorganisms .
We have now developed a device that allows simultaneous measurement of leaf net photosynthesis and root respiration.
10.1111 / tpj.12555
The contribution ofroot breathingto the carbon balance of aplanthas hardly been studied because roots are difficult to access and associated with soil microorganisms.
We have now developed a device that allows the simultaneous measurement of net photosynthesis in the shoot and respiration in the root.
By the end of the artificially dry summer, the lush green of the pasture had given way to a dry brown.
But in the process , the researchers were able to collect valuable data , soon to be evaluated , on the effects of droughts on vegetation ,plantphysiology , soilrespirationand underground microorganisms .
Developing a fodder report
By the end of that artificially dry summer, the willows had changed color from lush green to dull brown.
But in the course of this change, researchers were able to collect valuable data on the effects of drought on vegetation,plant physiology,ground breathingand collect subterranean microorganisms. Now it is time to evaluate these observations.
Pastures under satellite surveillance
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Participants conduct measurements of photosynthesis andrespirationusing cell extracts from differentplants. They extract enzymes from plant tissues and analyse the regulation of enzyme activity depending on substrate concentration .
The course is organised as a 3 week block in conjunction with the courses "Animal physiology" and "Biophysics".
communicated through practical experiments.
The course participants carry out measurements of thePhotosynthesis-andbreathabilityon plant tissues, extract enzymes and determine the regulation of enzyme activity as a function of substrate concentrations.
The course will be held in a 3-week block together with the courses "Animal Physiology" and "Biophysics" in September / October. A script for the course will be made available to the participants via the ILIAS system of the University of Stuttgart.
Plants need water to grow, but every hobby gardener knows that you shouldn ’ t carry this to excess either.
During waterlogging or flooding ,plantscan ’ t take up enough oxygen that they urgently need for their cellularrespirationand energy production .
Plants respond to this state of hypoxia with the activation of certain genes that help them cope with the stress.
Plants need water to grow, but every hobby gardener knows that watering can be overdone.
In the event of waterlogging in the ground or even flooding, thePlantno longer absorb enough oxygen, which they urgently need for theirZellatmungand the associated energy production.
The plant responds to this lack of oxygen, called hypoxia, by activating certain genes that help it cope better with stress.
As early as 1998 he published his first estimates on global net primary production :
the biomass that is produced byplantsand single-celled organisms which carry out photosynthesis and is not turned back into carbon dioxide and water in the course of cellularrespiration.
Even today, this work is still considered groundbreaking for all subsequent models that reflect and predict the Earth system’s reactions to global change.
As early as 1998 he published one of the first estimates of global net primary production:
of the biomass thatPlantand photosynthetic protozoa produce and not again in theZellatmungto carbon dioxide and waterimplement.
To this day, this work is considered to be seminal for all subsequent models that reflect and predict Earth system responses to global change.
Plants need water to grow, but every hobby gardener knows that you shouldn ’ t carry this to excess either.
During waterlogging or flooding ,plantscan ’ t take up enough oxygen that they urgently need for their cellularrespirationand energy production .
Research | News | 2011 | protein showsPlantthe oxygen content of the environment
Nanoparticles are more mobile and have a different surface structure.
Knowledge of these properties is important with the increasing use of nanomaterials as , as they are transferred through incinerationplantsor sewage , and as they are absorbed by people in food ( see ETH Life , 15 July 2008 ) and perhaps even through the skin andrespiration, and can thus enter the body .
Consequently, the scientists sprayed ten kilograms of cerium oxide particles measuring eighty nanometers in diameter onto refuse to be incinerated in a waste incineration plant in Solothurn, thus modelling refuse that is rich in nanoparticles.
Nanoparticles are more mobile and have a different surface structure.
Knowing these properties is important with increasing use of nanomaterials, since they areincineratorsor through the waste water ( see ETH Life from 07/15/08 ) from people via food, maybe also via the skin and thebreathing, can be absorbed and thus enter the body.
The scientists therefore sprayed ten kilograms of cerium oxide particles with a diameter of 80 nanometers onto the waste to be incinerated in a Solothurn waste incineration plant ( KVA ), thus modeling a particle-rich waste.
The findings from these studies served as the experimental basis for Chris Field to represent biogeochemical and ecological relationships in global models, which can also be used to determine the influence of climate change on the biosphere.
As early as 1998 he published his first estimates on global net primary production : the biomass that is produced byplantsand single-celled organisms which carry out photosynthesis and is not turned back into carbon dioxide and water in the course of cellularrespiration.
Even today, this work is still considered groundbreaking for all subsequent models that reflect and predict the Earth system ’ s reactions to global change.
The results of these studies served as an experimental basis for Chris Field to represent biogeochemical and ecological relationships in global models, which can also be used to determine the influence of climate change on the biosphere.
As early as 1998 he published one of the first estimates of global net primary production: the biomass thatPlantand photosynthetic protozoa produce and not again in theZellatmungconvert to carbon dioxide and water.
To this day, this work is considered to be seminal for all subsequent models that reflect and predict Earth system responses to global change.