A temperature response function for modeling leaf growth and development of the African violet (Saintpaulia ionantha Wendl.)
Response functions used in crop simulation models are usually different for different physiological processes and cultivars, resulting in many unknown coefficients in the response functions. This is the case of African violet (Saintpaulia ionantha Wendl.), where a generalized temperature response fo...
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| Format: | Article |
| Language: | English |
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Universidade Federal de Santa Maria
2004-01-01
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| Series: | Ciência Rural |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782004000100009 |
| _version_ | 1819032420044767232 |
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| author | Streck Nereu Augusto |
| author_facet | Streck Nereu Augusto |
| author_sort | Streck Nereu Augusto |
| collection | DOAJ |
| description | Response functions used in crop simulation models are usually different for different physiological processes and cultivars, resulting in many unknown coefficients in the response functions. This is the case of African violet (Saintpaulia ionantha Wendl.), where a generalized temperature response for leaf growth and development has not been developed yet. The objective of this study was to develop a generalized nonlinear temperature response function for leaf appearance rate and leaf elongation rate in African violet. The nonlinear function has three coefficients, which are the cardinal temperatures (minimum, optimum, and maximum temperatures). These coefficients were defined as 10, 24, and 33ºC, based on the cardinal temperatures of other tropical species. Data of temperature response of leaf appearance rate and leaf elongation rate in African violet, cultivar Utah, at different light levels, which are from published research, were used as independent data for evaluating the performance of the nonlinear temperature response function. The results showed that a generalized nonlinear response function can be used to describe the temperature response of leaf growth and development in African violet. These results imply that a reduction in the number of input data required in African violet simulation models is possible. |
| first_indexed | 2024-12-21T07:01:39Z |
| format | Article |
| id | doaj.art-0fda1b3aafb54839bcd5566af345e738 |
| institution | Directory Open Access Journal |
| issn | 0103-8478 1678-4596 |
| language | English |
| last_indexed | 2024-12-21T07:01:39Z |
| publishDate | 2004-01-01 |
| publisher | Universidade Federal de Santa Maria |
| record_format | Article |
| series | Ciência Rural |
| spelling | doaj.art-0fda1b3aafb54839bcd5566af345e7382022-12-21T19:12:12ZengUniversidade Federal de Santa MariaCiência Rural0103-84781678-45962004-01-013415562A temperature response function for modeling leaf growth and development of the African violet (Saintpaulia ionantha Wendl.)Streck Nereu AugustoResponse functions used in crop simulation models are usually different for different physiological processes and cultivars, resulting in many unknown coefficients in the response functions. This is the case of African violet (Saintpaulia ionantha Wendl.), where a generalized temperature response for leaf growth and development has not been developed yet. The objective of this study was to develop a generalized nonlinear temperature response function for leaf appearance rate and leaf elongation rate in African violet. The nonlinear function has three coefficients, which are the cardinal temperatures (minimum, optimum, and maximum temperatures). These coefficients were defined as 10, 24, and 33ºC, based on the cardinal temperatures of other tropical species. Data of temperature response of leaf appearance rate and leaf elongation rate in African violet, cultivar Utah, at different light levels, which are from published research, were used as independent data for evaluating the performance of the nonlinear temperature response function. The results showed that a generalized nonlinear response function can be used to describe the temperature response of leaf growth and development in African violet. These results imply that a reduction in the number of input data required in African violet simulation models is possible.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782004000100009temperaturemodelleaf growthleaf developmentAfrican violet |
| spellingShingle | Streck Nereu Augusto A temperature response function for modeling leaf growth and development of the African violet (Saintpaulia ionantha Wendl.) Ciência Rural temperature model leaf growth leaf development African violet |
| title | A temperature response function for modeling leaf growth and development of the African violet (Saintpaulia ionantha Wendl.) |
| title_full | A temperature response function for modeling leaf growth and development of the African violet (Saintpaulia ionantha Wendl.) |
| title_fullStr | A temperature response function for modeling leaf growth and development of the African violet (Saintpaulia ionantha Wendl.) |
| title_full_unstemmed | A temperature response function for modeling leaf growth and development of the African violet (Saintpaulia ionantha Wendl.) |
| title_short | A temperature response function for modeling leaf growth and development of the African violet (Saintpaulia ionantha Wendl.) |
| title_sort | temperature response function for modeling leaf growth and development of the african violet saintpaulia ionantha wendl |
| topic | temperature model leaf growth leaf development African violet |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782004000100009 |
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