Simultaneous Measurement of ABA, IAA and Gas in Citrus - Role of ABA in Relation to Sink Ability

JARQ : Japan Agricultural Research Quarterly
ISSN 00213551
書誌レコードID(総合目録DB) AA0068709X

Simultaneous measurement of concentrations of ABA, IAA and Gas from one extract was investigated. A simply assay of total Gas content could be obtained as only the early effluent on HPLC from ether and ethyl acetate extracts was collected, diluted gradually and applied for the bioassay together. This method was found to be suitable for application to citrus fruits and seedlings. Next, the distribution and changes in ABA and IAA concentrations in Valencia orange fruits were analyzed. Seeds showed a large peak of ABA (21 nmol/g fresh weight). In the central vascular axis, the IAA concentration reached a peak 119 days after full bloom. It is suggested that ABA in the seed and IAA in the central vascular axis play a role in the accumulation of assimilates. The effects of exogenous ABA on the changes in fruit drop, ABA catabolism, and the contents of sugars and organic acids of citrus fruits were evaluated in vivo by injection. Exogenously applied ABA was catabolized to about 10% in the fruits within 4 days. Injections of ABA resulted in the increase in the glucose and fructose concentrations, but not in that of the organic acids in juice. ABA appears to play a role in the increase of the sugar concentration in juice.

作成者 Kiyohide KOJIMA
国立情報学研究所メタデータ主題語彙集(資源タイプ) Journal Article
開始ページ 179
終了ページ 185
言語 eng