Premium
Sucrose and fructan metabolism in wheat roots at chilling temperatures
Author(s) -
Santoiani C. S.,
Tognetti J. A.,
Pontis H. G.,
Salerno G. L.
Publication year - 1993
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1993.tb08794.x
Subject(s) - fructan , sucrose , sucrose phosphate synthase , sucrose synthase , chemistry , metabolism , enzyme , phosphate , biochemistry , food science , invertase
Sucrose and fructan metabolism were studied in wheat ( Triticuin aotiirum L. cv. Tribal 800) roots during a period at chilling temperature. Enzyme activities related to fructan and sucrose metabolism were measured. Sucrose‐sucrose fructosyl transfer‐ase (EC 2.4.1.99) activity increased more than 25‐fold when plants were cooled to 4°C. Sucrose synthase (EC 2.4.1.13) and sucrose‐phosphate synthase (EC 2.4.1.14) activities also increased, but low temperatures had no significant effect on invertaso (EC 3.2.1.26) or on fructan hydrolase (EC 3.2.1.26) activities. The accumulation pattern of fructan in roots was different to that in leaves. In roots chilling stimulated the synthesis of fructans of high degree of polymerization.