Journal
BIOLOGIA PLANTARUM
Volume 60, Issue 3, Pages 579-584Publisher
ACAD SCIENCES CZECH REPUBLIC, INST EXPERIMENTAL BOTANY
DOI: 10.1007/s10535-016-0608-4
Keywords
arogenate dehydratase; chorismate mutase; fruit placenta; habanero pepper; phenylalanine ammonia lyase
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Funding
- CONACYT (Mexico) [168545]
- CONACYT
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Activities of phenylalanine (Phe) biosynthetic enzymes chorismate mutase (CM) and arogenate dehydratase (ADT) and of phenylalanine ammonia lyase [PAL, an enzyme that directs Phe towards capsaicinoid (CAP) synthesis] were analyzed during Capsicum chinense Jacq. (habanero pepper) fruit development. A maximum CM activity coincided with a maximum CAP accumulation. However, ADT exhibited two activity peaks, one during the early phase (10 - 17 days post-anthesis, DPA) and another during the late phase (35 - 37 DPA); only the latter coincided with CAP. Interestingly, PAL activity was inversely related to CAP accumulation; lower activities coincided with a maximum CAP content. These results suggest the operation of a control mechanism that coordinated Phe synthesis and its channeling towards CAP synthesis during the course of fruit development.
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