The effect of carbon dioxide on maize seed recovery after flooding

摘要: Flooding of recently planted fields maize (Zea mays L.) in the spring results poor emergence some germplasm. Previous studies have shown genetic variation for flooding tolerance inbreds and hybrids. This study was conducted to identify a biochemical basis reduced germination after determine differences between tolerant sensitive inbreds. Seeds soaked nonaerated water accumulated CO 2 . Reduction soaking partially reversed by venting seed with ambient air prior planting. Respiration measured immediately venting. rates flood increased faster higher level than those The apparent Michaelis constants succinate oxidation isolated intact mitochondria were Succinate competitively inhibited bicarbonate. As quantitation inhibition (Ki) bicarbonate increased, sensitivity decreased. Genetic inbred at least part influenced respiration