Physiology of StomataMcGraw-Hill, 1968 - 178 pagina's |
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Pagina 15
... pressure . When the stomatal pore is closed , the guard cells are in the relaxed state , perhaps slightly pressed together by the surrounding epidermal cells whose turgor is then either equal to or in excess of that of the guard cells ...
... pressure . When the stomatal pore is closed , the guard cells are in the relaxed state , perhaps slightly pressed together by the surrounding epidermal cells whose turgor is then either equal to or in excess of that of the guard cells ...
Pagina 38
... pressure gauge ) , and in Meidner's hand porometer ( 82 ) -both are useful and convenient field instruments ( Fig . 2.6 ) . In Alvim's porometer the time cup C 0- -0 manometer II B1 A B2 ( D from gasometer- B3 type aspirator filled with ...
... pressure gauge ) , and in Meidner's hand porometer ( 82 ) -both are useful and convenient field instruments ( Fig . 2.6 ) . In Alvim's porometer the time cup C 0- -0 manometer II B1 A B2 ( D from gasometer- B3 type aspirator filled with ...
Pagina 62
... pressure of the solution sufficiently to cause incipient drying . ( 133 ) The naturally occurring increases in the concentration of the cell sap would not cause more than a slight reduction in the vapour pressure of the sap ; for ...
... pressure of the solution sufficiently to cause incipient drying . ( 133 ) The naturally occurring increases in the concentration of the cell sap would not cause more than a slight reduction in the vapour pressure of the sap ; for ...
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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active aperture appears blue light brought carbon dioxide carried cause cent changes chapter chloroplasts CO2 concentration considerable darkness deficits density dependent determine diameter diffusion effect energy epidermal cells epidermal strips evidence example experiments external factors greater guard cells Heath higher illumination important increase indicates known lead leaf leaves length less light intensity lower measured mechanism mesophyll MICHIGAN minutes movements nature night normal observations obtained occur path period phase photosynthesis placed plants pore porometer possible present pressure probably produced reaction reduced relations remains resistance response rhythm shown shows solution space starch stomatal aperture stomatal behaviour stomatal closure stomatal movements stomatal opening studies subsidiary cells suggested supply surface Table temperature transpiration tube turgor unit usually viscous flow walls water vapour wide