厚壁毛竹与毛竹的抗寒生理比较研究

摘要

在冬季低温条件下,对厚壁毛竹和毛竹的叶、笋、芽3种器官脯氨酸(PRO)、丙二醛(MDA)含量及其超氧化物歧化酶(SOD)、过氧化氢酶(CAT)、过氧化物酶(POD)活性等抗寒生理指标进行了测定和分析.结果表明:厚壁毛竹叶、笋、芽3种器官的脯氨酸(PRO)含量分别为48.73,23.39,48.76 mg/g均高于毛竹,且差异显著；厚壁毛竹的叶、笋、芽3种器官内MDA含量分别为34.98,5.27,4.74 mmol/g(FW)也均高于毛竹,且叶与笋内的含量差异显著；同时,厚壁毛竹3种器官SOD、CAT和POD活性均高于毛竹.最后,隶属函数法综合判定厚壁毛竹抗寒性高于毛竹.%The contents of Praline ( PRO ) , malonaldehyde (MDA) and the activities of superoxide dis-mutase (SOD) , peroxidase (POD) and catalase (CAT) in leaves, shoots and buds of Phyllostachys edulis ' Pachyloen' and Ph. Edulis were studied in winter. The results showed that the PRO contents in the organs of Ph. Edulis 'Pachyloen' were 48.73 mg/g, 23.39 mg/g,48.76 mg/g respectively, significantly higher than those of Ph. Edulis; MDA contents in the 3 organs of Ph. Edulis 'Pachyloen' were 34.98 mmol/g(FW), 5.27 mmol/g(FW), 4.74 mmol/g(FW) respectively, also greater than those of PA. Edulis. The activities of SOD, CAT and POD in the 3 organs of Ph. Edulis ' Pachyloen' were also higher than those of Ph. Edulis. Subordinate function values indicated that the cold resistance of Ph. Edulis ' Pachyloen' was stronger than that of Ph. Edulis.