Role of ascorbic acid in enhancing hypoxia tolerance in roots of sensitive and tolerant apple rootstocks.

Highlights: [•] Hypoxia stress brought about oxidative damage and decrease in root AsA content. [•] AsA partially alleviated hypoxia-induced growth inhibition and oxidative stress. [•] AsA-triggered the up-regulation of antioxidant enzymes related the AsA–GSH cycle. [•] Additional AsA enhanced hypoxia tolerance of hypoxia-sensitive apple rootstocks. [ABSTRACT FROM AUTHOR]