三倍体ビワに対するGA_3とCPPU処理が無種子果の成長と品質に及ぼす影響  [in Japanese] Effects of GA_3 and CPPU Applications on Growth and Quality of Seedless Fruits in Triploid Loquat  [in Japanese]

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Author(s)

Abstract

‘田中’由来の三倍体ビワを用いてビワ無種子果を作出するため,GA<sub>3</sub>およびCPPUの処理回数,濃度および処理時期について検討した.200 ppm GA<sub>3</sub>と20 ppm CPPUとの混用液に,開花7日前~開花初期とその27 ~ 58日後の計2回,花(果)房を浸漬処理することによって,果形が縦長であるが完全な無種子で‘田中’(二倍体有種子果)と同等の大きさの果実が得られた.しかし,糖含量は年次変動によって二倍体有種子果より低い場合があった.<br>三倍体無種子果のがく片の大きさおよびがく孔の内径は二倍体有種子果の約2 倍に拡大し,果心部の子室に直径1 cm強の空洞が生じたが,その容積は果実全体の容積の 7%であった.果肉は赤道部で二倍体有種子果の約2倍厚くなり,重量割合で約20%増加したことから,三倍体無種子果の可食率は90%となった.三倍体無種子果の果肉の肥大は,GA<sub>3</sub>およびCPPUによって細胞数の増加と細胞の肥大が促進されたためと考えられた.

To produce seedless loquat fruits, the effects of GA<sub>3</sub> and CPPU applications on growth and quality of seedless fruits in the triploid loquat ‘Tanaka’ strain were investigated. The triploid seedless fruits equal in weight to that of ordinary fruits with seeds grown on diploid ‘Tanaka’ were produced at harvest time by dipping flower and fruit clusters in an aqueous solution of 200 ppm GA<sub>3</sub>+20 ppm CPPU twice, at flowering time (the first treatment) and between 27 to 58 days after the first treatment (the second treatment). However, the annual concentration of soluble solids in triploid loquat seedless fruits was lower than that of diploid loquat fruits with seeds. The triploid seedless fruits had a longer shape and higher fruit shape index (fruit length/fruit width) than diploid fruits with seeds. The tissue size of the enlarged calyx base and the internal space of the calyx tube of triploid seedless fruits increased to about 2 times as large as those of diploid seeded fruits, in addition, the locule size of the seedless fruits was slightly longer than 1 cm in diameter. However, the locule was only 7% of total volume of the seedless fruits. Flesh thickness at the equator of the seedless fruits grew to about 2 times that of fruits with seeds, the flesh weight increased by approximately 20%, and the edible portion increased to 90% of total weight of the seedless fruits. The increase in flesh thickness resulted from both cell division and cell enlargement.<br>

Journal

  • Horticultural Research (Japan)

    Horticultural Research (Japan) 5(2), 157-164, 2006-06-15

    THE JAPANESE SOCIETY FOR HORTICULTURAL SCIENCE

References:  20

Codes

  • NII Article ID (NAID)
    110004729602
  • NII NACSIS-CAT ID (NCID)
    AA11608561
  • Text Lang
    JPN
  • Article Type
    ART
  • ISSN
    13472658
  • NDL Article ID
    7995014
  • NDL Source Classification
    ZR7(科学技術--農林水産--農産)
  • NDL Call No.
    Z74-C757
  • Data Source
    CJP  NDL  NII-ELS  J-STAGE  NDL-Digital  JASI 
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