ジクロルプロップ及びダミノジッドによるリンゴ'つがる'の後期落果抑制とそれに伴うIAA及びABA含量の変化   :   Effects of dichlorprop and daminozide sprays on preventing preharvest fruit drop and the concentrations of endogenous IAA and ABA in 'Tsugaru' apple. 

作成者 塚原, 一幸, 鈴木, 富男, 小野, 剛史, 小原, 均, 松井, 弘之, 高橋, 英吉, 平田, 尚美
作成者 (ヨミ) ツカハラ, カズユキ, スズキ, トミオ, オノ, タカシ, オハラ, ヒトシ, タカハシ, エイキチ, ヒラタ, ナオミ
作成者の別表記 TSUKAHARA, Kazuyuki, SUZUKI, Tomio, ONO, Takashi, OHARA, Hitoshi, MATSUI, Hiroyuki, TAKAHASHI, Eikichi, HIRATA, Naomi
日本十進分類法 (NDC) 620
内容 リンゴ'つがる'に対する2, 4-DP及びSADH散布による落果抑制効果を明らかにするとともに, これら薬剤散布が果台, 離層周辺部, 果柄及び果肉中のIAA及びABA含量の変化に及ぼす影響を検討した.1.'つがる'の後期落果は, 2, 4-DP45ppmの収穫盛期25日前及び15日前の2回散布またはSADH2000ppmの満開3〜4週間後散布により抑制され, その効果は安定していた.2, 4-DP45ppm収穫盛期25日前1回散布やSADH400ppm満開3〜4週間後散布でも落果抑制効果が認められたが, 年度によって効果が不安定であった.2.無散布区の果台, 離層周辺部, 果柄及び果肉中のIAA含量は, 7月中旬までは果柄で最も多かったが, その後急激に減少し, 果台及び離層周辺部とほぼ同じレベルとなり, 果肉中のIAA含量は常に少なかった.2, 4-DP45ppm 2回散布およびSADH2000ppm満開4週間後散布区では, 8月中旬以降のIAA含量は果柄中で無散布区よりやや低く, 他の部位では無散布とほぼ同様に推移したことから, 落果に対するIAAの関与は明らかでなかった.3.果台中のABA含量は, 無散布区では7月上旬から中旬にかけて急減した.その後は8月中旬まで漸減し, 落果が始まる8月下旬からは徐々に増加した.この傾向は2, 4-DP散布区においても同様であったが, SADH散布区ではやや低い値で推移した.一方, 離層周辺部や果柄中のABA含量は, 6月末以降8月中旬頃までは同じレベルかやや減少気味に推移し, 落果が著しくなる8月下旬から9月上旬にかけて増加した.その程度は, 無散布区で急激であり, 2, 4-DP及びSADH散布区では比較的緩慢であった.果肉中のABA含量は, 成熟に向かって徐々に増加し, 8月下旬から9月上旬にかけては急激に増加した.その増加の程度は2, 4-DP, SADH, 無散布の順であった.離層部周辺または果柄中のABA含
Effects of dichlorprop (2, 4-DP) and daminozide (SADH) sprays on preventing preharvest fruit drop and the concentrations of endogenous indole-3-acetic acid (IAA) and abscisic acid (ABA) in 'Tsugaru' apple were examined. 1. Preharvest fruit drop was reduced significantly with a double sprays of 2, 4-DP at 45ppm (25 and 15 days before harvest) or a single spray of SADH at 2000ppm (3 to 4 weeks after full bloom). Effects of a single sprays of 2, 4-DP at 45ppm and SADH at 400ppm on preventing preharvest fruit drop were also recognized, but it was unstable from year to year. 2. IAA and ABA concentrations in the bourse, abscission zone, peduncle and flesh were estimated by HPLC. IAA concentrations in the all tissues extracted decreased from late June to mid-July, and then maintained on the same level until harvest. In the peduncle, IAA concentration was the highest from late June to mid-July, and then decreased rapidly and it finally became almost the same level as that of the bourse and absission zone. IAA in the flesh was on a lower level compared to other tissues. The role of endogenous IAA on fruit abscission was not clear, becouse IAA concentrations in all tissues extracted did not change during more than one month before fruit drop occurred and the sprays of 2, 4-DP and SADH which prevented preharvest fruit drop did not affect IAA concentration. 3. ABA concentration in unsprayed bourse decreased rapidly from early to mid-July, after that it decreased slowly, and then increased gradually in late August. The pattern of ABA concentration in the bourse sprayed with 2, 4-DP was almost same as that of unsprayed control. But in the bourse sprayed with SADH, ABA was constant at a lower level after mid-Augast. On the other hand, ABA concentrations in the abscission zone and peduncle of unsprayed control did not change or decreased slightly from late June to mid-August, and then increased rapidly from late August to early September when preharvest fruit drop increased. Although ABA concentrations in abscission zone and ped

公開者 千葉大学園芸学部
コンテンツの種類 紀要論文 Departmental Bulletin Paper
DCMI資源タイプ text
ファイル形式 application/pdf
ISSN 0069-3227
NCID AN00142658
掲載誌情報 千葉大学園芸学部学術報告 Vol.43 page.229-237 (19900200)
情報源 The technical bulletin of Faculty of Horticulture, Chiba University
言語 日本語
著者版フラグ publisher

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