寡日射条件における低温処理がコマツナ (Brassica campestris L.) の糖およびアスコルビン酸含有率に及ぼす影響  [in Japanese] Effects of Low Temperature on the Sugar and Ascorbic Acid Contents of Komatsuna (Brassica campestris L.) under Limited Solar Radiation  [in Japanese]

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Abstract

寡日射条件下におけるコマツナの糖および総アスコルビン酸含有率に及ぼす低温処理の影響を調査した.本実験期間内の日平均気温は低温処理区で2&acd;3℃, 冷温処理区で13&acd;15℃, 日射量は2&acd;4MJ/m<SUP>2</SUP>/日で経過した.新鮮重当たりの糖含有率は, 低温処理によって葉身, 葉柄とも経時的に高まった.また, 葉身の総アスコルビン酸含有率は, 低温処理区で急激に高まったが, 葉柄では徐々に高まった.一方, 冷温処理区では新鮮重当たりの糖と総アスコルビン酸の含有率は葉身, 葉柄ともに変化がなかった.単位面積当たりの糖と総アスコルビン酸含量は低温処理区が冷温処理区を大きく上回った.以上のことから, 北東北日本海側の寡日射下において, 冬期の低温条件により, コマツナの新鮮重当たりの糖および総アスコルビン酸含有率, また, 単位面積当たりの上記成分含量も向上することが明らかになった.

The effects of low temperature on the sugar and ascorbic acid contents of Komatsuna (Brassica campestris L.) plants grown under limited solar radiation in the greenhouse were evaluated. Komatsuna plants were grown in a greenhouse in which the mean air temperature was maintained between 13°C and 15°C (defined as the "cool temperature" condition). The solar radiation in the greenhouse fluctuated between 2 and 4 MJ/m<SUP>2</SUP>·day<SUP>-1</SUP> during the experiment. When Komatsuna plants grew to about 20cm height, they were transferred to a greenhouse in which the mean air temperature flucturated between 2°C and 3°C (defined as the "cold temperature" or "cold treatment"). The total sugar contents in leaf blades and in petioles of Komatsuna plants increased rapidly as a function of the cold treatment. The total ascorbic acid content in the leaf blades increased rapidly after the initiation of cold treatment, whereas that content in the petioles increased gradually. On the other hand, the composition of the leaf blades and petioles in the Komatsuna plants did not change when grown continuously in the cool plot. The data show that cold treatment promoted the per unit area production of the total sugar and total ascorbic acid. These results indicate that cold treatment could improve the nutritional qualities of Komatsuna plants, even under limited solar radiation in winter.

Journal

  • Journal of the Japanese Society for Horticultural Science

    Journal of the Japanese Society for Horticultural Science 68(2), 409-413, 1999-03-15

    THE JAPANESE SOCIETY FOR HORTICULTURAL SCIENCE

References:  13

Cited by:  5

Codes

  • NII Article ID (NAID)
    110001816230
  • NII NACSIS-CAT ID (NCID)
    AN00025257
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    00137626
  • NDL Article ID
    4685060
  • NDL Source Classification
    ZR7(科学技術--農林水産--農産)
  • NDL Call No.
    Z18-172
  • Data Source
    CJP  CJPref  NDL  NII-ELS  IR  J-STAGE  NDL-Digital 
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