2018
DOI: 10.1111/nph.15031
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Mesophyll conductance does not contribute to greater photosynthetic rate per unit nitrogen in temperate compared with tropical evergreen wet‐forest tree leaves

Abstract: Globally, trees originating from high-rainfall tropical regions typically exhibit lower rates of light-saturated net CO assimilation (A) compared with those from high-rainfall temperate environments, when measured at a common temperature. One factor that has been suggested to contribute towards lower rates of A is lower mesophyll conductance. Using a combination of leaf gas exchange and carbon isotope discrimination measurements, we estimated mesophyll conductance (g ) of several Australian tropical and temper… Show more

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Cited by 31 publications
(29 citation statements)
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“…The adjustment from apparent to true values resulted in changes to the key parameters V cmax25 and J max25 that are qualitatively comparable to the results of previous adjustments (Sun, Gu, Dickinson, Pallardy et al, ), and that compare well with independently adjusted parameters by Bahar, Hayes, Scafaro, Atkin, and Evans () (results not shown). The adjustment again underlines the asymmetrical effects that g m has on V cmax25 and J max25 .…”
Section: Discussionsupporting
confidence: 83%
“…The adjustment from apparent to true values resulted in changes to the key parameters V cmax25 and J max25 that are qualitatively comparable to the results of previous adjustments (Sun, Gu, Dickinson, Pallardy et al, ), and that compare well with independently adjusted parameters by Bahar, Hayes, Scafaro, Atkin, and Evans () (results not shown). The adjustment again underlines the asymmetrical effects that g m has on V cmax25 and J max25 .…”
Section: Discussionsupporting
confidence: 83%
“…This is an important area for future research, both empirical and theoretical, on the control of photosynthetic traits, although debate remains as to the necessity of incorporating g m estimates into wider models (e.g. Bahar et al ., ).…”
Section: Discussionmentioning
confidence: 97%
“…In our A / C i curve fitting method, we did not account for the variations in mesophyll conductance ( g m ) as g m is not separately identifiable from V cmax when fitting an A / C i curve. Therefore, the estimated parameters, V cmax and J max , are considered apparent values (Bahar, Hayes, Scafaro, Atkin, & Evans, ). This approach is appropriate for this analysis because almost all current TBMs ignore g m and use apparent V cmax and J max values.…”
Section: Methodsmentioning
confidence: 99%