Accumulation of Free Ricinoleic Acid in Germinating Castor Bean Endosperm | Zendy

Robert P. Donaldson | Zendy

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Accumulation of Free Ricinoleic Acid in Germinating Castor Bean Endosperm

Author(s) -

Robert P. Donaldson

Publication year - 1977

Publication title -

plant physiology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.554

H-Index - 312

eISSN - 1532-2548

pISSN - 0032-0889

DOI - 10.1104/pp.59.6.1064

Subject(s) - ricinoleic acid , endosperm , germination , castor beans , botany , chemistry , castor oil , biology , biochemistry , ricinus

Lipids from the endosperm of germinating castor bean (Ricinus communis var. Hale) were separated by thin layer chromatography and quantitated by gas chromatography. During the later stages of lipid breakdown (4-6 days germination at 30 C), several lipid classes were found in addition to the storage triglycerides, which are triricinoleins for the most part. One was identified as free ricinoleic acid, the proportion of which increased as germination progressed. After 6 days germination, ricinoleic acid comprised more than 30% of the total lipid. The appearance of this fatty acid implies that lipase activity (lipolysis) is not strictly coordinated with beta oxidation in this tissue.

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