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INCORPORATION OF 14 C‐LABBLLED SUBSTRATES BY UNINFETED AND VA MYCORRHIZAL ROOTS OF ONION
Author(s) -
LÖSEL DOROTHY M.,
COOPER KAREN M.
Publication year - 1979
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.1979.tb07466.x
Subject(s) - sucrose , photosynthesis , glycerol , chemistry , botany , ethanol , biochemistry , biology
S ummary VA mycorrhizal infection of onion roots with Glomus masseae increases their ability to incorporate carbon from external sources, such as sucrose, acetate and glycerol, as well as from photosynthetic assimilate. Within 20 min of photosynthesis in 14 CO 2 , radioactivity was present in lipid and non‐lipid, soluble and insoluble compounds of roots. After a chase period of 18 h, c.30 % of the radioactivity in mycorrhizal and non‐mycorrhizal roots supplied with [2‐ 14 C]‐acetate and [ 14 C]glycerol and 12 to 20% of that from [ 14 C]sucrose was in the lipid fraction, while c. 5% of the 14 C‐labelled photosynthate received by the roots appeared in lipids. Mycorrhizal roots differed from uninfected roots in their significantly higher incorporation of carbon from photosynthate, sucrose and acetate into ethanol‐soluble compounds and insoluble materials, from sucrose into water‐soluble compounds and from acetate into lipids.