DD207578A1 - INCUBATION KUVETTE FOR CHANGING THE FLUID OF PLANTS - Google Patents

Abstract

The invention relates to a incubation cuvette for gas exchange determinations of plants. The invention can be used for routine and research tasks in agriculture and forestry as well as in biological research work. Gas exchange controls on plants in the field, which are under uncontrolled conditions, have a low reproducibility mainly by changing the light and heat parameters. By using an additional light source, the scattering of the light factor can be eliminated. Thus, even under field conditions highly reproducible measurements of the gas exchange can be carried out. The cuvette can enclose the stalk or branch with the assimilation organs in a gas-tight manner at any portion of the plant by means of a dynamic closing mechanism. Ventilation ensures rapid concentration equalization of existing or applied gases in the entire interior of the cuvette.

Description

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Erfindimgsbeschreibung

Title of the ' invention '

Incubation cuvette for gas metabolism determination of plants

Field of application of the invention

The invention relates to an incubation cuvette for carrying out experiments for the purpose of determining the natural Gasstoffwechseis and its influence under constant conditions in field studies on plants »in particular conifers.

Characteristic of the known technical solutions __

Depending on the target position, the measurement of the gas metabolism can be carried out by means of a) ultraviolet absorption recorder (CO ₂ -MeSSUTLg, URAS technique)

"b) acid substance partial pressure measuring technique (pOp measurement)

c) isotope techniqueC C measurement)

will be realized"

Carbon dioxide measurements with the ultraviolet absorption recorder (URAS) have been carried out in free-standing, hitherto only with the use of translucent measuring cuvettes or in phytotron chambers with high material costs.

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, For the C-technique, only translucent cuvettes would be used up to now. The major disadvantage of gas metabolism determinations in ireland results from the fact that the test results (photosynthesis measurement) are very dependent on the natural radiation supply and thus make it difficult to reproduce experimental settings due to the variability of the available light becomes. , '' A constant supply of light could be guaranteed in the Phytotron, for larger perennial plants, however, the transport, the cultivation and / or accommodation in Phytotronkammern are limited · ^! ,

Object of the invention

The effect achieved by the invention is that a high reproducibility is achieved by performing a desired constant or controllable light intensity when carrying out experiments for gas exchange determination. This objective can be used for the URAS ^ and

^ C-technology can be ensured · For the experiments, a suitable construction of the cuvette enables gas-tight occlusion of apical and / or medial subareas.

Essence of the invention -

Object of the invention

The inventive task is to propose a novel cuvette construction, which allows branches or sections gas-tight by a dynamic translucent closing and sealing mechanism to envelop »

By supplying radioactively labeled ₂ and internal exposure by means of a suitable light source via an independent current source, highly reproducible test settings for respiration and photosynthesis measurements should thus be created as a function of the light intensity. By means of a ventilation device, it must be ensured that the concentration of the gaseous substances in the entire interior of the cuvette is uniform.

Due to special choice of material and surface design a sufficient temperature stability is ensured in accordance with the outside temperature with high uniform exposure, which also ensures a highly reproducible detection of Gasstöffweohsels even when connecting a DRAS measuring device in a closed circuit.

Before starting the experiment, move the cuvette over the branches until it reaches the desired position on the selected section and then close it gas-tight at both ends of the branch by the dynamic closing mechanism, the adjustment of the closing mechanism being adapted to any branch thicknesses no mechanical damage is caused to the branch · -

Outside the device, the elements for adjusting the light and ventilation device are mounted.

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Exemplary embodiment

A preferably cylindrical chamber 1 has on each side part an opening 2 whose diameter can be adapted to the object under examination by means of a dynamic closing mechanism 3, whereby a suitable gas tight closure is ensured by using suitable flexible material, which is suitable for the radioactive gas mixture which is supplied via an incubation channel 4 enters the recirculating air channel 5 and ensured by means of a ventilation device 6 taking advantage of the suction pressure principle, a uniform gas level throughout the interior of the cuvette »The lighting device 7, is designed so» that, they the interior with the Assimilationsorganen with any selectable quantity and quality photonsynthetically effective radiation can supply uniformly, wherein the power supply via the power grid or independently can be realized

Claims (1)

Invention anaestuffs . Incubation cuvette for determining gas metabolism of plants, characterized by a preferably cylindrical hollow body whose side openings via a dynamic closing mechanism for gas-tight enclosure of branches, branch sections and similar plant parts with Assimilations organs serve and their internal lighting device for the gas selected quality and quantity in the interior of the cuvette for evenly assimilates the assimilation organs ».