Identification of a harvest index for Monstera deliciosa and Philodendron sp. ‘Xantal’ leaves for ornamental use
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| Autores: | , , , |
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| Formato: | artículo original |
| Fecha de Publicación: | 2022 |
| Descripción: | Leaves of tropical ornamental plants exhibit a short vase life. Symptoms include yellowing and disease. These defects are associated with genetic and environmental factors but mainly associated with leaf age at harvest. Our research aimed to identify a harvest index to improve postharvest quality and extend vase life. Monstera deliciosa and Philodendron sp. ‘Xantal’ plants were grown under 70% permanent shading. Fifty young leaves of M. deliciosa and 25 leaves of Philodendron were tagged prior to expansion. Weekly measurements included foliar area, dry weight, color (CIE L*a*b* values, and indirect chlorophyll content (SPAD). Data were plotted against leaf age after full expansion and regression analysis was performed. In a second experiment, leaves of Monstera deliciosa and Philodendron sp. ‘Xantal’ were harvested at four developmental stages, commercially packed, and subjected to simulated shipping conditions. During vase life at 20°C with 12 h of daylight, the incidence and severity of leaf yellowing, and the incidence of mechanical damage and disease were evaluated with rating scales. SPAD value was highly correlated with leaf age (R2=0.787 for Monstera and R2=0.791 for Philodendron). In the commercial simulation trial, mature leaves (64 d after leaf expansion and with the highest SPAD value) showed less incidence of yellowing, disease, and mechanical damage during vase life. Chlorophyll content, measured as SPAD value, was a suitable harvest index and predictor of vase life. |
| País: | Kérwá |
| Institución: | Universidad de Costa Rica |
| Repositorio: | Kérwá |
| Lenguaje: | Inglés |
| OAI Identifier: | oai:kerwa.ucr.ac.cr:10669/91435 |
| Acceso en línea: | https://hdl.handle.net/10669/91435 |
| Palabra clave: | foliage leaf age leaf development leaf senescence vase life yellowing |