Real Time Diagnosis of Environmental Stress by Micromorphometric Method : 1. Effect of Air Temperature during Fruitlet Stage of Fruit on Stem and Fruit Diameters, and Fruit Growth in Japanese Pear Tree (Pyrus serotina Reheder cv. Kosui)
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概要
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The effects of air temperature during the fruitlet stage on stem and fruit diameters, and fruit production were examined in Japanese pear trees (Pyrus serotina cv. Kosui). Under controlled environmental conditions, plants at the fruitlet stage of fruit were exposed to three different air temperature regimes; 16, 23, and 30℃ for 2 d. Under glasshouse conditions, they were exposed to two night air temperature regimes: 11 and 18℃ for 35 consecutive days during the initiation and fruitlet stages of fruitS. Changes in the stem and fruit diameters during the treatment and/or residual effect were analyzed by the micromorphometric technique. Fruit growth increased most at 23℃, followed by 30℃ and least at 16℃ during the 2 d-period under the controlled environment. Under a lower temperature regime (16℃), fruit growth decreased a few hours after "lights on" in the morning while under a higher one (30℃), fruit growth slowed down about 24 h after treatment initiation. The stem diameter decreased in the daytime and recovered at night and the decrease in the daytime was less pronounced under the lower than the higher temperature regime. Similar effect of night air temperature regimes on the changes in the fruit and stem diameters was observed in plants grown under glasshouse conditions. Residual effect was observed during the fruitlet stage, but disappeared during maturation. The average weight of the mature fruit was greater under a higher than a lower temperature regime while no significant effect was observed on the fruit quality including total sugar concentration, acidity, and hardness. Based on the current data, we conclude that the effect of the air temperature on fruit growth could be diagnosed in real time (less than 24 h) by monitoring the changes in the fruit and stem diameters using a strain gauge-type microdisplacement detector.
- 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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