Abstract:

Changes of respiratory rate and glycolytic end products in brown lignified roots of sweet cherry, Meizao/Dongbei Shanyingtao(Prunus serrulata G.Don) and Meizao/Mahaleb(P. mahaleb L.), were studied under waterlogging conditions. The results indicated that root respiratory rate of two kinds of rootstocks, Dongbei Shanyingtao and Mahaleb, decreased gradually, and dropped to 73.86％and 80.71％, respectively, after treatment for 120 h. Content of acetaldehyde and ethanol increased obviously. The acetaldehyde content of Mahaleb was higher than that of Dongbei Shanyingtao, while the ethanol content was lower. The pyruvate content of Dongbei Shanyingtao increased initially and then decreased, but that of Mahaleb didn't change much. The content of lactate and succinate in roots of the two kinds of rootstocks increased at first and then decreased, and Dongbei Shanyingtao peaked earlier and higher than Mahaleb. The malate content of Dongbei Shanyingtao more than Mahaleb. The alanine content increased and Mahaleb was higher than that of Dongbei Shanyingtao. Content of aspatate and glutamate decreased obviously and that of Meizao/Mahaleb decreased more. The proline content increased at first and then decreased, and Mahaleb reached the maximum later and proline content was much higher that of Dongbei Shanyingtao. These results suggested that the response of the two kinds of sweet cherry rootstocks to waterlogging was different. Since its respiratory rate decreased more rapidly, and intracellular alkalization ability was lower, Dongbei Shanyingtao is more sentitive to waterlogging than Mahaleb.

Key words: Sweet cherry, Waterlogging, Root, Rootstock, Respiration, Glycolytic end products