檀香根和吸器发育与寄主植物根际酸碱度和内源激素关系研究

Santalum album is a semi parasitic evergreen tree in Santalaceae. The sandalwood has a broad use in craving, medicine, perfume, spice and incense. It has the name of "green gold". Development of sandal tree cultivation can get much higher economical profit than other economical trees. Development sandalwood cultivation industrial must face some basic factors such as host selection and nutrition absorption. In this program, we will study on the relationship between the development of root and haustorium of semiparasitic S. album and host plant rhizosphere pH and endogenous hormones. We will make clear how the pH value of the host rhizosphere affect on host selection and root, haustorial development. We will study on the structure of S. album root phloem, its nutrition absorption model and haustorium penetration mechanism, to investigate the development, function and mechanism of some relevant collapsed layers, gland and digitate cells. We will also detect endogenous hormones and will make certain whether the S. album transfer endogenous hormones to its host plant. Through our comprehensive research, we will make clear how the host rhizosphere pH value and endogenous hormones affect on sandal root, haustoria development and endogenous physiological mechanism and network of the sandal-host semi parasitic relationships. This will provide a theoretical basis for our sandalwood industry development which facing host screening and nutrition absorption.

檀香为檀香科常绿半寄生乔木。檀香木在雕刻、中药、香水、香料、香熏等方面具有广泛的用途，素有"绿色黄金"之称。发展檀香产业可获得比其它林木更高的经济收益，但发展檀香产业必须面临寄主选择及如何施肥灌溉等基础问题。本项目通过研究檀香根和吸器发育同不同植物根际酸碱度和内源激素的关系，搞清楚植物根际土壤pH值和内源激素如何影响檀香的半寄生性寄主选择及其根和吸器发育。我们将研究檀香根的韧皮部结构及其养分吸收模式；研究吸器入侵寄主的机制，探讨檀香吸器发育过程中有关坍塌层、腺体、指状细胞形成、功能及作用机制；检测根和吸器发育过程中内源激素含量变化以及檀香是否向寄主运输植物内源激素。通过开展本项目综合性研究，弄清楚寄主根际酸碱度和内源激素如何影响檀香根和吸盘发育和内在生理机制以及檀香对寄主植物特异性半寄生关系网络，为我国发展檀香产业所面临的寄主筛选和养分供给提供理论依据。

檀香为檀香科常绿半寄生乔木。檀香木在雕刻、中药、香水、香料、香熏等方面具有广泛的用途，素有"绿色黄金"之称。发展檀香产业可获得比其它林木更高的经济收益，但发展檀香产业必须面临寄主选择及如何施肥灌溉等基础问题。本项目通过研究檀香根和吸器发育同不同植物根际酸碱度和内源激素的关系，搞清楚植物根际土壤pH值和内源激素如何影响檀香的半寄生性寄主选择及其根和吸器发育。我们将研究檀香根的韧皮部结构及其养分吸收模式；研究吸器入侵寄主的机制，探讨檀香吸器发育过程中有关坍塌层、腺体、指状细胞形成、功能及作用机制；检测根和吸器发育过程中内源激素含量变化以及檀香是否向寄主运输植物内源激素。通过开展本项目综合性研究，弄清楚寄主根际酸碱度和内源激素如何影响檀香根和吸盘发育和内在生理机制以及檀香对寄主植物特异性半寄生关系网络，为我国发展檀香产业所面临的寄主筛选和养分供给提供理论依据。