WATER AND CARBON USE BY DEVELOPING FRUIT OF GRAPEFRUIT
| Autor: | Tzu-Bin Huang, Karen E. Koch |
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| Rok vydání: | 1990 |
| Předmět: | |
| Zdroj: | HortScience. 25:1075f-1075 |
| ISSN: | 2327-9834 0018-5345 |
| DOI: | 10.21273/hortsci.25.9.1075f |
| Popis: | Transpiration, respiration, dry weight gain, and water accumulation were measured to quantify the total carbon balance, total water utilization, carbohydrate cost for fruit growth, and water use efficiency in developing fruit of grapefruit (Citrus paradisi Macf). Rate of net carbon loss and net water loss (mg g-1FW hr-1) both decreased during fruit development. On a whole fruit basis, total carbon demand was reduced during the period of peak expansion, then increased rapidly during fruit maturation. In contrast, whole fruit rates of water loss and water utilization (loss plus accumulation) peaked at about 100 days after anthesis, then decreased toward fruit maturation. Carbohydrate cost for fruit growth was greatest (3.49 g sucrose g-1DW) at the early stage of fruit development (immediately following anthesis), whereas water use efficiency peaked (193 mg DM g-1 H2O) at the final stage of fruit development. The thickness of albedo and pectin content in fruit may contribute to the observed water conservation. Total estimated carbon cost of grapefruit development indicates approximately 120 g of sucrose would be necessary for production of a 450 g fruit (77 g DW) at 22 C. |
| Databáze: | OpenAIRE |
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