A low temperature anaerobic hardening response in winter wheat

H÷fundur┌tgefandi┌tgßfußr┌tgßfusta­ur
Andrews Chris J.B˙na­arfÚlag ═slands, BŠndaskˇlinn ß Hvanneyri, Rannsˇknastofnun landb˙na­arins, Rannsˇknast÷­ SkˇgrŠktar rÝkisins, Tilraunast÷­ hßskˇlans Ý meinafrŠ­i, Vei­imßlastofnun1989ReykjavÝk
Rit┴rgangurT÷lubla­Bls.
B˙vÝsindi253-56

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ABSTRACT

Flooding, prior to ice encasement, increases ice-encasement tolerance. Results suggest that the flooding of winter wheat increases the rate of glycolysis and the total adenylate level, which remains higher during the ice encasement. The activity of two glycolytic enzymes (ATP-dependent phosphofructokinase and PPi-dependent phosphofructophosphotransferase) increases during flooding and in ice following flooding.

Key words: enzyme activity, flooding, hardening, ice encasement, winter wheat.

YFIRLIT

H÷r­nunarvi­br÷g­ vetrarhveitis vi­ lßgan hita og loftfirr­

Flˇ­ ß undan svellun auka svell■o1 vetrarkorns. Flˇ­ auka glřkˇlřsu og adenřlat-magn vetrarhveitis, og helst ■etta me­an ß svellun stendur. Virkni tveggja ensÝma Ý glřkˇlřsunni (PFK og PFP) eykst Ý flˇ­um og Ý svellum sem fylgja Ý kj÷lfari­.