@article{oai:niigata-u.repo.nii.ac.jp:00002801, author = {Kojima, Kiyohide and Yamada, Yoshio and Yamamoto, Masashi}, issue = {2}, journal = {園芸学会雑誌}, month = {Sep}, note = {Various parts of developing Valencia orange fruits were analyzed for abscisic acid (ABA) and indole-3-acetic acid (IAA) by gas chromatography-electron capture detector and –mass spectrometry-selective ion monitoring with ^<3>H-ABA and [^<13>C_6]IAA as internal standards. The flesh and seed weight increased rapidly, while the albedo and flavedo weight increased gradually. The seed had a large peak of ABA concentrations (21 nmol・g^-1 fresh weight) 150 days after full bloom (DAB), while the flesh had a small peak (5 nmol・g^-1 fresh weight). IAA concentration in the seed decreased till 150 DAB but remained higher than other parts. In the central vascular axis, the IAA concentration reached a peak on 119 DAB. The level remained higher than those of the flesh, albedo and flavedo. The albedo and flavedo had an equally low level of IAA. We speculate from the analyses of the different fruit parts that 1) the ABA in the seed and IAA in the central vascular axis play a role in the accumulation of assimilates; and 2) the difference in ABA concentrations between the pulp and the peel indicates that no cross transfer occurs between these two tissues., 本実験ではバレンシアオレンジ果実の生長速度が高い秋期の果実を部分(果芯,種子,果肉,アルベド,フラベド)に分けてアブシジン酸(ABA)とインドール-3-酢酸(IAA)を分析した.ABAとIAAは,内部標準として^<3>H-ABAと[^<13>C_6]IAAを使用し,ガスクロマトグラフィー電子捕獲型検出器と質量分析器(選択的イオンモニタリング)で測定した.果肉と種子の重さは急激に増加したが,アルベドとフラベドの重さはゆるやかに増加した.150DAB(開花盛期後の日数)に,種子のABA濃度は大きなピーク(21nmmol・g^-1生重量)を示したが,果肉は小さなピーク(5nmol・g^-1生重量)であった.種子中のIAA濃度は150DABまで減少したが,他の分析した部分よりも高い濃度であった.果芯部のIAA濃度は119DABにピークを示し,果肉・アルベド・フラベドよりも高い濃度を保った.アルベド,フラベドは同程度の低いIAA濃度であった.得られた部位別の植物ホルモン量より,種子中のABAと同化物集積性や果芯部のIAAと維管束との関係,果肉と果皮間のABAの非移動性,部分別の植物ホルモン分析の必要性が示唆された.}, pages = {335--339}, title = {Distribution of ABA and IAA within a Developing Valencia Orange Fruit and Its Parts}, volume = {63}, year = {1994} }