A Decrease in Mesophyll Conductance by Cell-Wall Thickening Contributes to Photosynthetic Downregulation
نویسندگان
چکیده
منابع مشابه
Mesophyll conductance to CO2 in Arabidopsis thaliana.
The close rosette growth form, short petioles and small leaves of Arabidopsis thaliana make measurements with commercial gas exchange cuvettes difficult. This difficulty can be overcome by growing A. thaliana plants in 'ice-cream cone-like' soil pots. This design permitted simultaneous gas exchange and chlorophyll fluorescence measurements from which the first estimates of mesophyll conductance...
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Limited mesophyll diffusion conductance to CO(2) (g(m)) can significantly constrain plant photosynthesis, but the extent of g(m)-limitation is still imperfectly known. As g(m) scales positively with foliage photosynthetic capacity (A), the CO(2) drawdown from substomatal cavities (C(i)) to chloroplasts (C(C), C(i)-C(C)=A/g(m)) rather than g(m) alone characterizes the mesophyll diffusion limitat...
متن کاملTemperature Response of Mesophyll Conductance
Departments of Plant Biology and Crop Sciences, University of Illinois, Urbana, Illinois 61801 (C.J.B., A.R.P., S.P.L.); Photosynthesis Research Unit, Agricultural Research Service, United States Department of Agriculture, Urbana, Illinois 61801 (C.J.B., A.R.P.); and Molecular Plant Physiology Group, Research School of Biological Sciences, Australian National University, Canberra City, Australi...
متن کاملSeasonal time-course of gradients of photosynthetic capacity and mesophyll conductance to CO2 across a beech (Fagus sylvatica L.) canopy.
Leaf photosynthesis is known to acclimate to the actual irradiance received by the different layers of a canopy. This acclimation is usually described in terms of changes in leaf structure, and in photosynthetic capacity. Photosynthetic capacity is likely to be affected by mesophyll conductance to CO(2) which has seldom been assessed in tree species, and whose plasticity in response to local ir...
متن کاملElevated CO 2 effects on mesophyll conductance and its consequences for interpreting photosynthetic physiology
Mesophyll conductance ( g m ) generally correlates with photosynthetic capacity, although the causal relationship between the two is unclear. The response of g m to various CO 2 regimes was measured to determine its relationship to environmental changes that affect photosynthesis. The overall effect of CO 2 growth environment on g m was species and experiment dependent. The data did not statist...
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ژورنال
عنوان ژورنال: Plant Physiology
سال: 2020
ISSN: 0032-0889,1532-2548
DOI: 10.1104/pp.20.00328