Physiology of StomataMcGraw-Hill, 1968 - 178 pagina's |
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Pagina 36
... clamps that fulfil these requirements are shown in Fig . 2.4 ; clamp ( a ) is modelled after that designed by Spanner and Heath , ( 137 ) and clamp ( b ) is a simple version more suitable for field porometers . ( 82 ) upper chamber ...
... clamps that fulfil these requirements are shown in Fig . 2.4 ; clamp ( a ) is modelled after that designed by Spanner and Heath , ( 137 ) and clamp ( b ) is a simple version more suitable for field porometers . ( 82 ) upper chamber ...
Pagina 48
... clamp , shown diagrammatically in Fig . 2.12 has been made from a 20 cm disposable syringe . The sensor element can be positioned at different distances from the mouth of the clamp and calibration is therefore easy . The range of the ...
... clamp , shown diagrammatically in Fig . 2.12 has been made from a 20 cm disposable syringe . The sensor element can be positioned at different distances from the mouth of the clamp and calibration is therefore easy . The range of the ...
Pagina 157
... clamp at the ground - glass joint between readings . When the stomata are fairly wide open and the leaf transpires strongly , after about sixty to ninety minutes , refrain from detaching the porometer from the clamp and , while a ...
... clamp at the ground - glass joint between readings . When the stomata are fairly wide open and the leaf transpires strongly , after about sixty to ninety minutes , refrain from detaching the porometer from the clamp and , while a ...
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