TY - JOUR
T1 - Wheat genotypes show contrasting abilities to recover from anoxia in spite of similar anoxic carbohydrate metabolism
AU - Goggin, Danica
AU - Colmer, Tim
PY - 2007
Y1 - 2007
N2 - Physiological and metabolic responses to anoxia and reaeration were compared for 4-7-day-old seedlings of 11 genotypes of wheat (Triticum aestivum) with reputed differences in waterlogging tolerance. Genotypes differed in seminal root elongation, and recovery of root tissue K+ concentration, during reaeration following 72 h anoxia. Post-anoxic recovery ranged from complete (100% retention of seminal. root elongation potential) to almost nit (death of all seminal root apices and inabitity to recover K+ concentration). The anoxia tolerance ranking of the genotypes based on these parameters corresponded with that of their reputed waterlogging tolerance, but with some exceptions. However, the differences in anoxia tolerance of the seedlings could not be explained by differences in capacity for ethanol production. A decreased abitity to utilise seed starch reserves under anoxia, due to inadequate levels of alpha-amylase activity at the time anoxia was imposed, was apparent in all. genotypes. (C) 2007 Elsevier GmbH. All rights reserved.
AB - Physiological and metabolic responses to anoxia and reaeration were compared for 4-7-day-old seedlings of 11 genotypes of wheat (Triticum aestivum) with reputed differences in waterlogging tolerance. Genotypes differed in seminal root elongation, and recovery of root tissue K+ concentration, during reaeration following 72 h anoxia. Post-anoxic recovery ranged from complete (100% retention of seminal. root elongation potential) to almost nit (death of all seminal root apices and inabitity to recover K+ concentration). The anoxia tolerance ranking of the genotypes based on these parameters corresponded with that of their reputed waterlogging tolerance, but with some exceptions. However, the differences in anoxia tolerance of the seedlings could not be explained by differences in capacity for ethanol production. A decreased abitity to utilise seed starch reserves under anoxia, due to inadequate levels of alpha-amylase activity at the time anoxia was imposed, was apparent in all. genotypes. (C) 2007 Elsevier GmbH. All rights reserved.
U2 - 10.1016/j.jplph.2007.01.007
DO - 10.1016/j.jplph.2007.01.007
M3 - Article
C2 - 17349715
SN - 0176-1617
VL - 164
SP - 1605
EP - 1611
JO - Journal of Plant Physiology
JF - Journal of Plant Physiology
IS - 12
ER -