C02-enhanced Foliar Deformation of Tomato: Relationship to Foliar Starch Concentration
| Autor: | Mary M. Peet, K.E. Tripp, D.H. Willits, D.M. Pharr |
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| Rok vydání: | 1991 |
| Předmět: | |
| Zdroj: | Journal of the American Society for Horticultural Science. 116:876-880 |
| ISSN: | 2327-9788 0003-1062 |
| DOI: | 10.21273/jashs.116.5.876 |
| Popis: | Two cultivars of greenhouse tomato (Lycopersicon esculentum Mill.) were grown with ambient or 1000 µl CO2/liter during Jan.-June 1987 and 1988. In both years, CO 2-enrichment increased foliar deformation and foliar starch, but during the season, foliar starch levels decreased while deformation increased. 'Laura' had more defor- mation, while 'Michigan-Ohio' had higher foliar starch concentration. During an entire season, there was no significant relationship between foliar starch concentration and deformation severity. Foliar C exchange rates in the lower canopy were not affected by severity of deformation. Data from these experiments do not support the hypothesis that excess foliar starch is responsible for foliar deformation at elevated CO 2. Foliar deformation responses to elevated CO2 have been ob- served in various crops (DeLucia et al., 1985; Ito, 1978; Van Berkel and Van Uffeln, 1975). Mortensen (1987) reviewed many observations of injuries to cultivated plants associated with CO 2 enrichment. Van Berkel (1981) investigated chlorosis and foliar "die-off" in Gerbera under elevated CO2 (600-4500 µl·liter -l ) and found a direct correlation between CO2 concentration and these responses. Nagoaka et al. (1974) reported that tomato leaves became thickened, twisted, and purple at 1000 to 1500 µl CO2/liter, especially under high light intensity. Madsen (1974) reported deformed tomato leaves at elevated CO2 (650-3200 µl·liter -1 ) and noted that the intensity of deformity increased |
| Databáze: | OpenAIRE |
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