SUCROSE AND FRUCTAN METABOLISM IN WHEAT ROOTS AT CHILLING TEMPERATURES

被引:26
|
作者
SANTOIANI, CS [1 ]
TOGNETTI, JA [1 ]
PONTIS, HG [1 ]
SALERNO, GL [1 ]
机构
[1] FDN INVEST BIOL APLICADAS,CTR INVEST BIOL,CASILLA CORREO 1348,RA-7600 MAR DEL PLATA,ARGENTINA
关键词
CHILLING; FRUCTANS; ROOTS; SUCROSE; SUCROSE-PHOSPHATE SYNTHASE; SUCROSE SYNTHASE; SUCROSE-SUCROSE FRUCTOSYL TRANSFERASE; TRITICUM-AESTIVUM; WHEAT;
D O I
10.1111/j.1399-3054.1993.tb08794.x
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Sucrose and fructan metabolism were studied in wheat (Triticum aestivum L. cv. Trigal 800) roots during a period at chilling temperature. Enzyme activities related to fructan and sucrose metabolism were measured. Sucrose-sucrose fructosyl transferase (EC 2.4.1.99) activity increased more than 25-fold when plants were cooled to 4-degrees-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 invertase (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.
引用
收藏
页码:84 / 88
页数:5
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