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Analysis and Modeling of Processes Involved with Salt Tolerance and Rice
Author(s) -
Tartarini Sofia,
Paleari Livia,
Movedi Ermes,
Sacchi Gian Attilio,
Nocito Fabio Francesco,
Confalonieri Roberto
Publication year - 2019
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci2018.10.0609
Subject(s) - salinity , oryza sativa , biology , cultivar , soil salinity , biomass (ecology) , agronomy , crop , biomass partitioning , fight or flight response , botany , microbiology and biotechnology , biological system , ecology , biochemistry , gene
Salinity is a worldwide problem for rice ( Oryza sativa L.) cultivation, and a number of breeding programs targeting increased salt tolerance are ongoing. A new trait‐based mathematical model for salt stress on rice was recently proposed, characterized by a high level of detail in the description of physiological mechanisms dealing with crop response to salinity. In this study, dedicated growth chamber experiments were performed where three rice cultivars with different degrees of tolerance were grown under different salinity levels. The aim was to improve the understanding of physiological mechanisms like Na + uptake and sequestration in structural tissues, and to validate the model using new datasets where temporal dynamics in plant response to salt stress were analyzed. Model evaluation demonstrated strong agreement between measured and simulated dry weights of plant organs (e.g., R 2 = 0.88–0.97 for aboveground biomass), [Na + ] in plant tissues ( R 2 = 0.73–0.88), and green leaf area index ( R 2 = 0.71–0.99). These results demonstrate the reliability of the model and support its adoption within studies aimed at analyzing or predicting the response of different cultivars to temporal dynamics of Na + concentration in soil and water.