ULTRASTRUCTURE OF STRIPE RUST (PUCCINIA STRIIFORMIS f. sp. TRITICI) INTERACTING WITH SLOW-RUSTING, HIGHLY RESISTANT, AND SUSCEPTIBLE WHEAT CULTIVARS
ULTRASTRUCTURE OF STRIPE RUST (PUCCINIA STRIIFORMIS f. sp. TRITICI) INTERACTING WITH SLOW-RUSTING, HIGHLY RESISTANT, AND SUSCEPTIBLE WHEAT CULTIVARS
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DOI：
10.4454/jpp.v91i3.551
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发表时间：
2009-11
影响因子：
2.2
通讯作者：
Q. Ma;H. Shang
中科院分区：
文献类型：
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作者：
Q. Ma;H. Shang
研究了慢锈性、高抗性和感病性小麦品种与条锈菌的互作关系。sp. triangulae）的超微结构水平进行了研究。锈菌广泛地定植在易感小麦品种的叶子上。明鲜169的叶片中有少量或极少量的慢锈性。东方红3号和高抗杂交种46号。显微观察表明，近免疫品种的吸器和菌丝几乎全部被抑制，慢锈品种的吸器和菌丝大部分被抑制，而感病品种的吸器和菌丝几乎全部正常发育。高抗品种表现为严重坏死的细胞，而在慢锈小麦细胞坏死发生在菌丝延伸的过程中。慢锈品种具有与抗病品种相同的过敏反应特性，但寄主细胞坏死较晚，数量较少。这仅部分抑制真菌生长，这导致真菌的抑制和坏死较少。与抗病品种一样，慢锈小麦也产生了与防御反应相关的防御结构和材料，但程度较低。对慢锈与过敏性抗性的细胞学相似性进行了简要讨论。
Interactions between slow-rusting, highly resistant, and susceptible cultivars of common wheat (Triticum aestivum) with stripe rust (Puccinia striiformis f. sp. tritici) were studied at the ultrastructural level. The rust fungus extensively colonized leaves of the susceptible wheat cv. Mingxian 169, but was limited or extremely limited in the leaves of slow-rusting cv. Dongfanghong 3 and of the highly resistant Hybrid 46. Microscopic observations showed that nearly all haustoria and hyphae were inhibited in the nearly immune cultivar, the majority of them were inhibited in the slow-rusting cultivars, but nearly all of them developed normally in the susceptible cultivar. The highly resistant cultivar showed heavily necrotized cells, while in slow-rusting wheat cell necrosis occurred during the process of hyphal extension. The slow-rusting cultivar has the same hypersensitive response characters as the resistant cultivar, but the host cells necrotized later and were fewer in number. This inhibited only in part the fungal growth, which resulted in lesser inhibition and necrosis of the fungus. As in the resistant cultivar, defense structures and materials associated with defense reaction were also produced in slow-rusting wheat, but to a lesser extent. The cytological similarities of slow-rusting with hypersensitive resistance are briefly discussed.