夏期および秋期栽培ホウレンソウの生育過程における部位別成分について  [in Japanese] Compositional Changes in Spinach (Spinacia oleraceaL) Grown in the Summer and in the Fall.  [in Japanese]

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Abstract

夏期栽培の'マジック'および秋期栽培の'リード'のホウレンソウの生育過程におけるカロテノイド, 総アスコルビン酸, 還元糖, クロロフィル, 硝酸根およびシュウ酸含量の変化について検討した.<BR>1.カロテノイドを測定した結果, 両部位ともにカロテン類では, β-カロテンのみ検出された. 収穫適期の可食部では夏期は4,450μg/100g, 秋期は7,340μg/100gと秋期に約1.6倍多く含有されていた.<BR>2.総アスコルビン酸は収穫適期の可食部では, 夏期は42mg/100g, 秋期は71mg/100gで秋期に約1.7倍多く含有され, 両季節とも生育に伴って減少した.<BR>3.還元糖は収穫適期の可食部では, 夏期は0.07g/100g, 秋期は1.12g/100gと秋期に16倍多く含有されていた. また, 生育過程において夏期は減少傾向を示したのに対し, 秋期は増加し, 季節により異なる傾向を示した.<BR>4.クロロフィルは生育期間中, 夏期においては変化は認められなかったが, 秋期ではやや増加した. さらに, β-カロテンとの間に正の相関関係が認められた.<BR>5.硝酸根は収穫適期の可食部では, 夏期は2,500ppm, 秋期は2,400ppmと栽培時期による差はみられなかった. また, クロロフィルと硝酸根含量の関係は認められなかった.<BR>6.可溶性シュウ酸は収穫適期の可食部では, 夏期は740mg/100g, 秋期は560mg/100gと夏期に約1.3倍多く含有されていた.<BR>7.収穫適期における可食部の総シュウ酸量に対する可溶性シュウ酸量の割合は, 夏期は87.1%, 秋期は80%で, やや夏期の割合が大きかった.

Changes in carotenoid, ascorbic acid, reducing sugar, chlorophyll, nitrate, and soluble and insoluble oxalic acid contents in the leaf blade, petiole, and the edible portion of developing spinach plants were determined. The summer and fall cultivars studied were 'Magic' and 'Lead', respecitvely. In this summary, the chlorophyll content is expressed as mg/100 cm<SUP>2</SUP> of leaf area. The data for the remaining constituents are for the edible portion based on 100 g fresh wt.<BR>1. Beta-carotene, the only carotene detectable, for 'Magic' and 'Lead' were 4, 450 and 7, 340 μg, respectively.<BR>2. The total ascorbic acid contents which gradually decreased with time in 'Magic' and 'Lead' were 42 and 71 mg, respectively.<BR>3. The reducing sugar content in 'Magic' decreased with leaf age, whereas that of 'Lead' increased. At harvest, the reducing sugar content in 'Lead' was 1.12 g ; that of 'Magic' was 0.07 g.<BR>4. Chlorophyll content in 'Magic' remained nearly constant at 3.2 mg, whereas that of 'Lead' increased slightly from 3.8 to 4.1 mg by harvest. A positive correlation exists between chlorophyll and β-carotene contents.<BR>5. Nitrate contents of 'Magic' and 'Lead' were 2, 500 and 2, 400 ppm, respectively.<BR>6. Soluble oxalic acid contents at harvest for 'Magic' and 'Lead' were 740 and 560 mg, respectively. The ratio of the soluble to total oxalic acid was 0.871 in 'Magic' and 0.800 in 'Lead'.

Journal

  • Journal of the Japanese Society for Horticultural Science

    Journal of the Japanese Society for Horticultural Science 62(4), 889-895, 1994

    THE JAPANESE SOCIETY FOR HORTICULTURAL SCIENCE

Cited by:  12

Codes

  • NII Article ID (NAID)
    130001152299
  • NII NACSIS-CAT ID (NCID)
    AN00025257
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    0013-7626
  • NDL Article ID
    3869367
  • NDL Source Classification
    RB48(農産--園芸作物および栽培--蔬菜)
  • NDL Source Classification
    ZR7(科学技術--農林水産--農産)
  • NDL Call No.
    Z18-172
  • Data Source
    CJPref  NDL  IR  J-STAGE 
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