The effect of flooding on adventitious root formation of Arundinella anomala Steud.and Salix variegata Franch.in the three gorges reservoir was investigated.The results indicated that adventitious root formation of A.anomala was earlier than that of S.variegate.The number of adventitious root of S.variegate did not increase insignificantly,with the increase of belowground submerged period.Before 30 days belowground submerged,the number of adventitious root of A.anomala was increased.Ater 30 days,the status ...