Composés glucidiques et azotés et résistance à la sécheresse chez Ailanthus altissima

In Ailanthus altissima, carbohydrate and protein reserves are mainly localized in the tap-root. Under drought stress they are very quickly hydrolysed. Despite the water deficiency, an increase in starch synthesis is observed in the leaves and stem during the first stages of stress. Stimulation of the cambial activity of the stems and an increase in protein content have also been observed. Chemical analyses have shown a high proline content which increases markedly following drought stress, especially in the tap-root.