Physiology of StomataMcGraw-Hill, 1968 - 178 pagina's |
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Pagina 39
... Wheatstone bridge porometer . This instrument was constructed by Heath and Russell in 1951 ; ( 51 ) it is a further refinement in poro- metry , incorporating principles analogous to those of an electrical Wheatstone bridge , and is more ...
... Wheatstone bridge porometer . This instrument was constructed by Heath and Russell in 1951 ; ( 51 ) it is a further refinement in poro- metry , incorporating principles analogous to those of an electrical Wheatstone bridge , and is more ...
Pagina 40
... Wheatstone bridge porometer ( 50 ) Wheatstone - bridge porometer is shown in Fig . 2.9 . The pressure of an air stream from an aspirator , A , is balanced in the arms of a Wheatstone bridge to obtain a null reading of the single ...
... Wheatstone bridge porometer ( 50 ) Wheatstone - bridge porometer is shown in Fig . 2.9 . The pressure of an air stream from an aspirator , A , is balanced in the arms of a Wheatstone bridge to obtain a null reading of the single ...
Pagina 41
... Wheatstone bridge . One of these arms consists of any one of three known capillary resistances , D1 , D2 , D3 , in series with the unknown resistance offered by the leaf , E. The other arm of the bridge consists of a known fixed ...
... Wheatstone bridge . One of these arms consists of any one of three known capillary resistances , D1 , D2 , D3 , in series with the unknown resistance offered by the leaf , E. The other arm of the bridge consists of a known fixed ...
Inhoudsopgave
MORPHOLOGY AND PHYSIOLOGY OF STOMATAL CELLS | 1 |
THE MEASUREMENT OF Stomatal APERTURE | 26 |
THE THEORY OF DIFFUSION THROUGH STOMATA | 49 |
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acid air space system antitranspirants blue light carbon dioxide cause stomatal closure cent changes in stomatal chlorophyll chloroplasts cm² CO₂ CO2 concentration CO2-compensation point CO2-free air cobalt chloride paper darkness degree of opening density diameter diffusion path diffusive flow effective length endogenous rhythms energy epidermal cells epidermal strips evidence experiments glucose-1-phosphate glycollate guard cells Heath hydrolysis illumination leaf light intensity liquid phase mannitol manometer Mansfield mbar measured mesophyll metabolic Mouravieff night opening normal observations occur onion opening and closing osmotic oxidative phosphorylation oxygen photophosphorylation photosynthesis plants plasmolysed porometer pressure rate of diffusion rate of photosynthesis reaction reduced resistance to diffusion shown solution Stålfelt's starch content stomatal aperture stomatal behaviour stomatal control stomatal mechanism stomatal movements stomatal opening stomatal pores stomatal resistance stomatal tube subsidiary cells temperature increase tissue turgor uptake Vicia faba water deficit water vapour Xanthium pennsylvanicum Zelitch