EPIDERMAL DERIVATIVES AS XYLEM ELEMENTS AND TRANSFER CELLS - A STUDY OF THE HOST-PARASITE INTERFACE IN 2 SPECIES OF TRIPHYSARIA (SCROPHULARIACEAE)
EPIDERMAL DERIVATIVES AS XYLEM ELEMENTS AND TRANSFER CELLS - A STUDY OF THE HOST-PARASITE INTERFACE IN 2 SPECIES OF TRIPHYSARIA (SCROPHULARIACEAE)
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DOI：
10.1007/bf01379049
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发表时间：
1993-01-01
期刊：
影响因子：
2.9
通讯作者：
KUIJT, J
中科院分区：
文献类型：
--
作者：
HEIDEJORGENSEN, HS;KUIJT, J
小三囊藻和杂色三囊藻的吸器。通过光学显微镜和电子显微镜对自然栖息地的子进行了分析。次生吸器的龙骨状边缘一般平行于根轴劈开寄主根的表皮和皮层，并穿透寄主维管组织。吸器的反倾伸长的表皮细胞构成了大部分的宿主/寄生虫界面。这些表皮细胞中的一些被倾斜的细胞壁分开。它们的一些斜向子细胞以及一些未分裂的表皮细胞分化成木质部分子。单个表皮细胞偶尔侵入宿主的维管组织，单个宿主细胞也可被侵入。在寄生薄壁界面细胞质膜的表面积增加的转移细胞的特征性壁的分化和膜内衬的细胞质小管或扁平囊的发展，成为嵌入在部分ligorous界面细胞壁。在某些吸器中，菌根真菌菌丝进入木质部桥。这些意见的吸器的功能的影响进行了讨论。
Haustoria of Triphysaria pusilla and T versicolor subsp. faucibarbata from a natural habitat were analysed by light and electron microscopy. The keel-shaped edge of the secondary haustorium generally splits the epidermis and cortex of the host root parallel to the root axis, and penetrates to the host vascular tissue. Anticlinally elongated epidermal cells of the haustorium constitute most of the host/parasite interface. Some of these epidermal cells are divided by oblique cell walls. Some of their oblique daughter cells as well as some undivided epidermal cells differentiate into xylem elements. Single epidermal cells occasionally intrude into the vascular tissue of the host and individual host cells can be invaded. The surface area of the plasmalemma in parasitic parenchymatous interface cells is increased by the differentiation of wall labyrinths characteristic of transfer cells and by the development of membrane-lined cytoplasmic tubules or flattened sacs which become embedded in the partly lignified interface cell-wall. Mycorrhizal fungal hyphae enter the xylem bridge in some haustoria. Implications of these observations for the function of the haustorium are discussed.