Effect of CO_2 Enrichment on Fruit Growth and Quality in Japanese Pear (Pyrus serotina Reheder cv. Kosui)
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概要
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Six year-old Japanese pear (Pyrus serotina Reheder cv. Kosui) trees grafted on P. serotina cv. Nihonyamanashi were grown in containers filled with Granite Regosol under glasshouse conditions. At different stages of fruit growth, pear trees were exposed to an elevated CO_2 concentration (130 Pa CO_2) along with a control (35 Pa CO_2). For one group of plants, CO_2 enrichment was applied for 79 d from 52 d after full bloom (DAB) to fruit maturity (long-term CO_2 enrichment) and for another group the same treatment was applied for 35 d from 96 DAB to fruit maturity (short-term CO_2 enrichment). The effects of the elevated CO_2 concentration on vegetative growth, mineral contents, and fruit production and quality were examined. Long-term CO_2 enrichment enhanced vegetative growth, without any significant effect on the mineral contents in either flower bud or fruit except for a remarkable increase in the K content. Long-term CO_2 enrichment increased the fruit size and fresh weight, but had no significant effect on the fruit quality. On the other hand, the short-term CO_2 enrichment did not induce any significant change in the fruit size but increased the fruit sugar concentration. Along with the reduction of the sorbitol concentration in fruit, the fructose and sucrose concentrations increased and these changes occurred earlier at elevated CO_2 than at ambient CO_2 concentrations. From these results, we concluded that the effect of CO_2 enrichment on fruit growth varies depending upon the growth stages of fruit: during the initial and fruitlet stages when fruit expansion occurs, CO_2 enrichment increases the fruit size, whereas, during maturation when fruit expansion has slowed down and sugar accumulation in fruit is active, it increases the fruit sugar concentration.
- 社団法人日本土壌肥料学会の論文
著者
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FUJITA Kounosuke
Faculty of Applied Biological Science, Hiroshima University
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FUJIWARA Tamio
Shionogi Institute for Medical Science
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FUJIWARA Tamio
b Shionogi Institute for Medical Science
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Fujita K
Department Of Environmental Dynamics And Management Graduate School Of Biosphere Science Hiroshima U
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Fujita K
Graduate School Of Biosphere Science Hiroshima University
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Fujita K
Department Of Environmental Dynamics And Management Graduate School Of Biosphere Sciences Hiroshima
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Fujita Kounosuke
Faculty Of Applied Biological Science Hiroshima University
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Ito Junki
Hiroshima Prefectural Agricultural Center
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Hasegawa Shigeki
Hiroshima Prefectural Agricultural Center
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Ogasawara Shizuhiko
Hiroshima Prefectural Agricultural Center
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Fujiwara Tamio
Hiroshima Prefectural Agricultural Center
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Fujiwara T
B Shionogi Institute For Medical Science
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Hasegawa S
National Institute For Agro-environmental Sciences:(present Address)graduate School Of Agriculture H
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Ogasawara Shizuhiko
Hiroshima Prefectural Agricultural Center:(present) Fruit Tree Research Institute Hiroshima Prefectu
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