2003 Fiscal Year Final Research Report Summary
Interactions between JA and ABA in fruit and synthesis of JA derivatives shich is effective in field
| Project/Area Number |
14560031
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
園芸・造園学
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| Research Institution | Hiroshima Prefectural University |
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Principal Investigator |
KONDO Satoru Hiroshima Prefectural University, School of Bioresources, Professor, 生物資源学部, 教授 (70264918)
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| Co-Investigator(Kenkyū-buntansha) |
SETO Hideharu RIKEN, Researcher, 植物機能研究室, 専任研究員 (40175419)
HIRAI Nobuhiro Kyoto University, International Innovation Center, Associate professor, 国際融合創造センター, 助教授 (00165151)
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| Project Period (FY) |
2002 – 2003
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| Keywords | Physiologically active substances / Jasmonic acid / Abscisic acid / Phaseic acid / dihydro phaseic acid / xanthoxin |
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| Research Abstract |
The interactions between JA and ABA were investigated in some fruits.
A suitable internal standard for the measurement of natural xanthoxin (XAN) was developed. The relative amounts of ABA in the pulp increased toward apple fruit maturation. On a molar basis, the amount of total XAN (cis,trans-XAN and trans,trans-XAN) in immature fruit was equal to the amount of ABA. However during the fruit ripening process, the total XAN levels markedly decreased in proportion with increases in the levels of ABA. At the climacteric rise and post climacteric stage ABA concentrations were higher than the total amount of XAN. The low levels of XAN in a ripening apple may be caused by to its rapid turnover. The total XAN concentration in the seeds was high in immature seeds but decreased toward seed maturation. The opposite tendency was observed in the case of ABA concentration. Thus, decreases of total XAN correlated with increases in the ABA levels ; this tendency was observed in both the pulp and seeds
… More
, and was consistent with the role of XAN as an ABA precursor. In the pulp, PA concentrations changed in a manner similar to those of ABA. The maximum epi-DPA concentration was 67% of the maximum ABA concentration, but the maximum DPA concentration was only 11% of the maximum ABA concentration. Therefore, epi-DPA was thought to be a major metabolite of PA in the pulp. The derivatives of Jasmonic acid (JA) which are effective in the field were developed. The applications of some kinds of JA derivatives increased anthocyanin accumulation of apples in the field.
JA and methyl jasmonate (MeJA) were quantified in the skin, pulp, and seeds of mangoes (Mangifera indica L.). JA concentrations in the skin were higher than those in the pulp. 1-aminocyclopropane-1 -carboxylic acid (ACC) concentrations in the skin and pulp increased toward harvest. Differing with JA,ACC concentrations in the pulp were high compared with the skin. This fact suggests that although JA and ACC are associated with the ripening of mangoes, they may play different roles. JA concentrations in the seeds, of both cultivars decreased toward harvest. It is possible that the result indicates a lack of dormancy in mango seeds. Changes of jasmonates during storage were also examined. JA levels in the skin and pulp increased in stored fruit. In addition, the degree of JA increase was large in fruit which lost much weight. It is assumed that JA associated with fruit senescence was caused by moisture loss. Less
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Research Products
(8 results)
