Breakdown of Galactolipids in Senescent Barly Leaves | Zendy

Gut Hans | Zendy; Matile Philippe | Zendy

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Breakdown of Galactolipids in Senescent Barly Leaves

Author(s) -

Gut Hans,

Matile Philippe

Publication year - 1989

Publication title -

botanica acta

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.871

H-Index - 87

eISSN - 1438-8677

pISSN - 0932-8629

DOI - 10.1111/j.1438-8677.1989.tb00064.x

Subject(s) - galactolipids , galactolipid , senescence , degree of unsaturation , biochemistry , chemistry , phospholipid , biology , membrane , chromatography , microbiology and biotechnology , chloroplast , gene

The changes of galactolipids (MGDG and DGDG, largely 18:3/18:3), free fatty acids (FFA), and phosphatidylcholine (PC) taking place during senescence of primary barley leaves were analysed employing HPLC and GLC. Upon induction of senescence MGDG and, with some delay, DGDG began to disappear and were largely broken down at the end of the senescence period. A concomitant appearance of a pool of FFA could not be observed. However, PC accumulated during the main period of galactolipid breakdown. This change was due to the marked increase of the 18:3/18:3 molecular species of PC. An inverse correlation between the changes of galactolipids and PC could be established. A hypothesis featuring the conversion of galactolipids via diacylglycerol to PC is presented as the principal route of galactolipid breakdown.

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