Simple scaling of photosynthesis from leaves to canopies without the errors of big‐leaf models

Plant, Cell and Environment - Tập 20 Số 5 - Trang 537-557 - 1997
D. G. G. DE PURY1, Graham D. Farquhar1
1Environmental Biology, Research School of Biological Sciences, Institute of Advanced Studies, The Australian National University, Canberra, ACT, Australia

Tóm tắt

ABSTRACTIn big‐leaf models of canopy photosynthesis, the Rubisco activity per unit ground area is taken as the sum of activities per unit leaf area within the canopy, and electron transport capacity is similarly summed. Such models overestimate rates of photosynthesis and require empirical curvature factors in the response to irradiance. We show that, with any distribution of leaf nitrogen within the canopy (including optimal), the required curvature factors are not constant but vary with canopy leaf area index and leaf nitrogen content. We further show that the underlying reason is the difference between the time‐averaged and instantaneous distributions of absorbed irradiance, caused by penetration of sunflecks and the range of leaf angles in canopies.These errors are avoided in models that treat the canopy in terms of a number of layers – the multi‐layer models. We present an alternative to the multi‐layer model: by separately integrating the sunlit and shaded leaf fractions of the canopy, a single layered sun/shade model is obtained, which is as accurate and simpler. The model is a scaled version of a leaf model as distinct from an integrative approach.

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Tài liệu tham khảo

10.1093/jxb/29.4.815

10.1007/BF00014590

10.1071/PP9940623

10.1007/BF00329431

10.1071/PP9950425

Badger M.R., 1977, Studies on the kinetic mechanism of ribulose‐1, 5‐bisphosphate carboxylase and oxygenase reactions, with particular reference to the effect of temperature on kinetic parameters, Carnegie Institute of Washington Yearbook, 16, 355

10.1016/B978-0-12-233440-5.50011-7

Björkman O., 1980, Adaptation of Plants to Water and High Temperature Stress, 233

Boote K.J., 1991, Modeling Crop Photosynthesis ‐from Biochemistry to Canopy, 109, 10.2135/cssaspecpub19

10.1007/BF00197022

10.1007/978-1-4684-9917-9

10.1016/0168-1923(91)90002-8

10.2307/2401567

dePuryD.G.G.(1995)Scaling photosynthesis and water use from leaves to paddocks.PhD thesis The Australian National University Canberra .

Wit C.T., 1965, Photosynthesis of Leaf Canopies

10.1111/1365-3040.ep11611823

10.3733/hilg.v38n04p181

10.1104/pp.72.2.297

Evans J.R., 1991, Modelling Crop Photosynthesis – from Biochemistry to Canopy, 1

10.1098/rstb.1989.0016

10.1007/BF00386231

10.1007/BF00379710

Field C., 1986, On the Economy of Plant Form and Function, 25

10.1007/978-94-011-1566-7_13

Goudriaan J., 1977, Crop Micrometeorology: a Simulation Study

10.1016/0168-1923(86)90063-8

10.2135/cropsci1992.0011183X003200060004x

10.1007/BF00378977

Iqbal M., 1983, An Introduction to Solar Radiation

10.1071/PP9890501

10.1016/S0022-5193(84)80131-9

Jones H.G., 1992, Plants and Microclimate

10.1007/BF00398720

10.1071/PP9840519

Kriedemann P.E., 1973, Natural occurrence and photosynthetic utilization of sunflecks by grapevine leaves, Photosynthetica, 7, 18

10.1126/science.174.4007.371

10.1111/j.1365-3040.1995.tb00624.x

10.1007/978-3-642-70868-8_25

Monsi M., 1953, Über den lichtfaktor in den pflanzengesellschaften und seine bedeutung fur die stoffproduktion, Japanese Journal of Botany, 14, 22

Norman J.M., 1979, Modification of the Aerial Environment of Plants, 249

Norman J.M., 1980, Predicting Photosynthesis for Ecosystem Models, 49

10.1016/B978-0-12-332850-2.50009-8

10.1016/B978-0-12-233440-5.50010-5

Norman J.M., 1989, Photosynthesis, 227

Pons T.L., 1989, Causes and Consequences of Variation in Growth Rate and Productivity of Higher Plants, 175

10.1016/0168-1923(94)05071-D

10.1016/0168-1923(92)90026-Z

Ross J., 1975, Vegetation and the Atmosphere, Vol. 1, Principles, 13

10.1007/978-94-009-8647-3

Ross J., 1967, Photosynthesis of Productive Systems, 86

10.1007/BF00317432

10.1071/PP9950593

10.1093/jxb/40.6.633

10.1007/BF00010170

10.1016/0034-4257(92)90102-P

10.2307/2402257

Smolander H., 1984, Measurement of fluctuating irradiance in field studies of photosynthesis, Acta Forestalia Fennica, 187, 1

Spiertz J.H.J., 1978, Effects of nitrogen on crop development and grain growth of winter wheat in relation to assimilation and utilization of assimilates and nutrients, Netherlands Journal of Agricultural Science, 26, 210, 10.18174/njas.v26i2.17100

10.1111/j.1365-3040.1995.tb00623.x

10.1007/BF00206296

10.2307/2390031

10.1111/j.1469-8137.1960.tb06195.x

10.1071/PP9940169

10.1016/0168-1923(85)90020-6

10.1016/S0065-2113(08)60282-5

10.1139/x93-203

10.1093/jxb/44.5.907

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Plant, Cell and Environment

Tập 20 Số 5

537-557

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