| 摘要: |
| 以柽柳和柽柳-管花肉苁蓉为试验材料,利用稳定性同位素示踪技术(13C)研究了管花肉苁蓉对柽柳同化物分配的影响。结果表明: 1)管花肉苁蓉促进柽柳光合枝13C同化物生成量提高33.9%。 2)单位柽柳干量13C同化物分配量,在光合枝、茎和根分别提高113.0%、81.0%和72.0%;进而促进柽柳13C同化物更多向管花肉苁蓉转移,分配比例为37.6%。3)管花肉苁蓉提高柽柳光合枝叶绿素含量19.0%,光合速率提高20.0%,但单株柽柳干重为7.7 g,比对照降低了25.8%。结果提示:管花肉苁蓉优化了柽柳同化物在器官间的分配,促使更多的同化产物向管花肉苁蓉分配;管花肉苁蓉呼吸可能是导致柽柳-管花肉苁蓉总干重降低的一个原因。 |
| 关键词: 管花肉苁蓉 柽柳 同化物 分配 13C |
| DOI：10.11841/j.issn.1007-4333.2011.04.007 |
| 投稿时间：2011-01-04 |
| 基金项目:农业行业专项(200903001-2-3); 北京市科技计划项目(D07060200880701); 河北省科技攻关项目(03276408D-4); 中国农业大学研究生创新项目(15050230) |
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| Optimization of infection by Cistanche tubulosa onTamarix chinensis assimilate distribution |
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LUO Xiang, ZHAI Zhi-xi, GUO Yu-hai, DU You, ZHU Yan-xia
|
| (College of Agronomy and Biotechnology,China Agricultural University,Beijing 100193,China) |
| Abstract: |
| The accumulation and distribution of photosynthate in Tamarix chinensis parasitized by C.tubulosa were studied using 13C stable isotope tracer technique.The results showed that:(1) After parasitism by C.tubulosa,the 13C-assimilation in T.chinensis leaves increased by 33.9%.(2) The 13C-assimilation distribution in T.chinensis was improved 113% in leaves,81% in stems and 72% in roots respectively,that promoted translocation and distribution into Cistanche tubulosa reached to 37.6% of 13C-assimilation accumulation during photosynthesis.(3) The chlorophyll content in T.chinensis leaves increased by 19.0%,the photosynthetic rate of the T.chinensis was risen by 20%.The dry weight per plant was 7.7 g less than 25.8% of the control.These results indicated that the assimilate distribution in the organs of T.chinensis was optimized by C.tubulosa.The reduction in weight was supposed to be concerned with the respiration process of the parasitic plant. |
| Key words: Cistanche tubulosa Tamarix chinensis photosynthesis distribution 13C |
