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Low temperatures decrease CO2 assimilation and growth in the tropical rambutan

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Diczbalis, Y. and Menzel, C. M. (1998) Low temperatures decrease CO2 assimilation and growth in the tropical rambutan. Journal of Horticultural Science & Biotechnology, 73 (1). pp. 65-71. ISSN 1462-0316

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Article Link: https://doi.org/10.1080/14620316.1998.11510945

Abstract

In glasshouse experiments, high temperatures increased vegetative growth in the tropical rambutan (Nephelium lappaceum L. seedlings of cv. Rapiah). In absolute terms, there was generally a greater response to night temperature (day/night temperatures of 32714°C vs. 32728°C) than to day temperature (22714°C vs. 32714°C), and better growth at 32728°C than at 32722°C. The effects of temperature on nutrient concentrations were small, whereas average leaf water potential (ΨL) during the day was -1.5 MPa at 32728°C, 0.1 to 0.4 MPa higher with nights of 14° or 22°C, and 0.7 MPa higher at 22714°C. Average net C02 assimilation rate (A) was 5.3 μ-mol m−2 s−1 at 32722° and 32728°C, 50% lower at 32714°C and 80% lower at 22714°C. When seedlings of cv. Rapiah were grown in water baths, the two critical root temperatures at which 90% of maximum plant weight occurred were similar for leaves and stems (about 24° to 30°C), but lower for roots (19° to 25°C). There was only a small effect of temperature on the concentration of most nutrients, and on average day time ΨL, whereas average A was 4.5 (μmol m s−1 at 28°C, 30% lower at 20°C, and 80% lower at 15° and 38°C. These experiments show that rambutan growth was strongly reduced when night or root temperatures fell to 14° or 15°C. The main effect was through lower Co−2 assimilation, whereas the changes in water and nutrient status were relatively small. Areas where night or root temperatures remain at or below 14°C for prolonged periods should be avoided for rambutan production.

Item Type:Article
Subjects:Plant culture > Fruit and fruit culture > Culture of individual fruits or types of fruit > Stonefruit
Plant culture > Horticulture. Horticultural crops
Live Archive:15 Mar 2024 05:49
Last Modified:15 Mar 2024 05:49

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