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Titolo:
EVALUATION OF TOMGRO, A DYNAMIC-MODEL OF GROWTH AND DEVELOPMENT OF TOMATO (LYCOPERSICON-ESCULENTUM MILL) AT VARIOUS LEVELS OF ASSIMILATE SUPPLY-AND-DEMAND
Autore:
BERTIN N; GARY C;
Indirizzi:
INRA,CTR RECH AVIGNON,BIOCLIMATOL STN,BP 91 F-84143 MONTFAVET FRANCE INRA,CTR RECH AVIGNON,BIOCLIMATOL STN,BP 91 F-84143 MONTFAVET FRANCE
Titolo Testata:
Agronomie
fascicolo: 5, volume: 13, anno: 1993,
pagine: 395 - 405
SICI:
0249-5627(1993)13:5<395:EOTADO>2.0.ZU;2-5
Fonte:
ISI
Lingua:
FRE
Keywords:
LYCOPERSION-ESCULENTUM MILL; SOURCE STRENGTH; SINK STRENGTH; ASSIMILATE PARTITIONING; FRUIT SET; MODELIZATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
NO
Recensione:
Indirizzi per estratti:
Citazione:
N. Bertin e C. Gary, "EVALUATION OF TOMGRO, A DYNAMIC-MODEL OF GROWTH AND DEVELOPMENT OF TOMATO (LYCOPERSICON-ESCULENTUM MILL) AT VARIOUS LEVELS OF ASSIMILATE SUPPLY-AND-DEMAND", Agronomie, 13(5), 1993, pp. 395-405

Abstract

TOMGRO, a tomato growth and development model, has been examined under different levels of assimilate source and sink activities, induced by CO2 enrichment and truss thinning. The main purpose was the evaluation of the assumptions on dry matter partitioning and fruit setting. The photosynthesis submodel has been calibrated to fit the daily dry matter production. The main input parameters to the development and growth submodels have been experimentally measured. The calibrated model provides good simulations of the leaf area expansion, but it takes no account of the variations in the assimilates stored in leaf blades. Total fruit growth is well simulated in spite of a small underestimation for of development and simulations of source/sink balance leads to goodsimulations of the number of set fruits. This result confirms the hypothesis that fruit set depends on the ratio between assimilate source and sink activities. This calibration with a beef tomato cultivar proves the robustness of the model and permits some improvements to be suggested. The surplus assimilates should be stored in a pool, which could exert a buffer effect during low supply periods. Sink strength of reproductive and vegetative parts should be measured for different cultivars, and under various climatic conditions. Finally, whether the functions of assimilate distribution and fruit set are still valid under very low supply conditions or whether some organs have priority over the others remains to be determined.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/04/20 alle ore 09:41:46