Abstract:
:Theoretical analysis of the CO(2) assimilation and water loss by single leaves suggests that the water use efficiency of C(4) species decreases as stomatal resistance increases. To confirm this hypothesis for a complete maize crop, results from computer simulations and a field experiment were compiled for varying stomatal resistances. A soil-plant-atmosphere model allowed simulations of the many simultaneous interactions between a crop canopy and its environment. The simulations for varying stomatal resistances clearly indicated that as stomatal resistance increased, water use efficiency of the maize crop decreased. The field experiment data also confirmed that water use efficiency was significantly decreased under water stress conditions when stomatal resistance increased. We concluded that management practices for maize, which induce moisture stress conditions resulting in increased stomatal resistance, reduce both crop photosynthetic productivity and water use efficiency.
journal_name
Plant Physioljournal_title
Plant physiologyauthors
Sinclair TR,Bingham GE,Lemon ER,Allen LHdoi
10.1104/pp.56.2.245subject
Has Abstractpub_date
1975-08-01 00:00:00pages
245-9issue
2eissn
0032-0889issn
1532-2548journal_volume
56pub_type
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