Abstract:
:Rates of assimilation and transpiration in Eucalyptus pauciflora Sieb. ex Spreng were measured at various ambient partial pressures of CO(2) and various irradiances and were used to estimate leaf conductance and intercellular partial pressure of CO(2). The responses of leaf conductance and rate of assimilation to change in intercellular partial pressure of CO(2) were expressed in terms of feedback. They are small in the sense that their combined effect was to reduce disturbances in intercellular partial pressure of CO(2) by 30% only. The magnitude of the feedback had no influence on the system as affected by irradiance, because the direct responses of conductance and rate of assimilation to changes in irradiance in the range 0.25 to 2 millieinsteins per meter per second were such that intercellular partial pressure was maintained almost constant.
journal_name
Plant Physioljournal_title
Plant physiologyauthors
Wong SC,Cowan IR,Farquhar GDdoi
10.1104/pp.62.4.670subject
Has Abstractpub_date
1978-10-01 00:00:00pages
670-4issue
4eissn
0032-0889issn
1532-2548journal_volume
62pub_type
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