Studies on Waterlogging Tolerance of Five Magnoliaceae Plants

王晶 严丹峰 王亚玲＊ （棕榈生态城镇发展股份有限公司，广东 广州 510627）

＊

WANG JING，YAN Dan-feng，wang Ya-ling

（Palm Eco-town Development Co., Ltd., Guangzhou 510627, China）

Abstract: To study the waterlogging tolerance of Magnoliaceae plants, the two-year-old seedlings of five Magnoliaceae plants were used as test materials to observe and analyze the growth and morphological indexes of plants under waterlogging stress. The results showed that, Magnolia polytepala and Yulania stellate have strong waterlogging tolerance, and the survival rate of the two were 100%, and the leaf damage index were only 15.2 and 13.6. In the late of waterlogging stress, the growth of M. polytepala and Y. stellate increased, and the dermis of the stem of the two extended white short and thick adventitious roots. M. ‘Lü Xing’ and Y. cylindrica have poor waterlogging tolerance, but the tolerances of different individuals within the species are quite different. After waterlogging stress, their survival rates are 0% and 12%, and the leaf damage index are 100 and 97.6. M. × loebneri ‘Mag’s pirouette’ has moderate tolerance, with a survival rate of 84% and a leaf damage index of 57.0 after waterlogging stress. There was insignificant increase in growth at the end of waterlogging, and no adventitious roots appeared. Comprehensive data and analysis prove that the waterlogging tolerance of the five Magnoliaceae plants from strong to weak are M. polytepala, Y. stellate, M. × loebneri ‘Mag’s pirouette’, Y. cylindrica, M. ‘Lü Xing’.

Key words: Magnoliaceae plants; Waterlogging stress; Waterlogging tolerance