Influence on biomass and carbohydrate in Nitraria tangutorum Bobr. when it parasitized by Cynomorium songaricum | 锁阳寄生对白刺生物量及碳水化合物影响研究

chinois. 为明确锁阳寄生对白刺各器官生物量以及碳水化合物含量、累积量和分配比例的影响,本研究采用称重法测定生物量、蒽酮比色法测定糖和淀粉的含量。结果表明：1）锁阳寄生后,白刺根、茎、叶生物量分别减少2.58、6.87和4.61g/株,寄生复合体生物量也降低2.82g/株。2）锁阳寄生后,白刺根、叶中可溶性糖的含量分别提高0.8%、0.17%,茎降低0.61%;白刺根、茎、叶淀粉含量分别提高6.24%、1.87%、0.39%;非结构性碳水化合物的含量则分别提高7.05%、1.25%、0.56%。3）锁阳寄生后,白刺根、茎、叶非结构性碳水化合物分配比例均分别降低3.59%、25.09%、16.35%。研究结果说明锁阳寄生调整白刺体内碳水化合物更多地向锁阳中分配和累积。

anglais. To understand the change of the biomass and carbohydrate, in each organ of Nitraria tangutorum when parasitized by Cynomorium songaricum, weighing and anthrone colorimetric methods were used to analyse their accumulation and distribution. After parasitization by C. songaricurn, it was found that： 1 ） the biomass of N. tangutorum in roots,stems and leaves were reduced by 2.58,6.87 and 4.61 g/plant respectively, and the biomass of parasitic complex of Nitraria-Cynomorium was reduced by 2.82 g/planh 2）the content of sugar in roots, leaves of N. tangutorum were increased by 0.8% and 0. 17% ,whereas in stems the content decreased by 0.61% ; the content of starch in roots,stems and leaves of N. tangutorum were increased by 6.24%, 1.87%, 0.39% ; the content of non-structural carbohydrates in roots, stems and leaves of N. tangutorum were increased by 7.05 %, 1.25 % ,0.56% ;3）the allocation ratio of non-structural carbohydrates in roots,stems and leaves of N. tangutorum were reduced by 3.59% ,25.09%, 16.35% respectively. In a word, when N. tangutorum parasitized by C. songaricum, more carbohydrates were accumulated and distributed to C. songaricum.