Abstract:
:Mevalonic acid-2-(14)C was readily incorporated into the free, esterified, and glycosidic sterol fractions of tobacco (Nicotiana tabacum L. var. Burley 21) seedlings. The time course of mevalonic acid-2-(14)C incorporation was different for the various individual sterols. Campesterol and sitosterol (group I) became radioactive as the free sterol and subsequently as the steryl ester. The reverse order was observed for cholesterol and stigmasterol (group II). Light stimulated the incorporation of mevalonic acid-2-(14)C into the group I free sterols and during the first 6 to 9 hours into the steryl esters of group II. The increase in specific radioactivity of the group II steryl esters was followed by a decline. Based on time course studies it is suggested that the group II steryl esters turn over rapidly and that light influences the rate of turnover.
journal_name
Plant Physioljournal_title
Plant physiologyauthors
Bush PB,Grunwald Cdoi
10.1104/pp.51.1.110subject
Has Abstractpub_date
1973-01-01 00:00:00pages
110-4issue
1eissn
0032-0889issn
1532-2548journal_volume
51pub_type
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