Leaf rust on Aegilops speltoides caused by a new forma specialis of Puccinia triticina
Leaf rust on Aegilops speltoides caused by a new forma specialis of Puccinia triticina
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DOI：
10.1094/phyto.2004.94.1.94
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发表时间：
2004-01-01
期刊：
影响因子：
3.2
通讯作者：
Anikster, Y
中科院分区：
文献类型：
--
作者：
Ben Yehuda, P;Eilam, T;Anikster, Y
本文首次报道了一种叶锈病在其自然栖息地侵染褐皮盾。它是在以色列北部和中部的两个地点发现的。这两个孢体在孢子大小上与小麦叶锈病相似。尿二孢子气孔下囊泡的形态和包孢子核的DNA含量。与小麦叶锈病分离株相似，从小麦叶锈病分离株中提取的分离株与特殊寄主Thalictrum speciosissimum具有亲和性，并且易于与小麦叶锈病分离株杂交。然而，小麦叶锈病的分离株与小麦叶锈病的远端寄主范围不同。它们对栽培的小麦品种无毒，但对数百种对小麦叶锈病免疫的小麦品种有攻击作用。这种独特的寄主偏好证明了新发现的叶锈病是小麦内的一种特殊形式（f.sp . speltoides）。
A leaf rust attacking Aegilops speltoides in its natural habitat is reported for the first time. It was found in two locations in northern and central Israel. The two collections from A. speltoides resemble wheat leaf rust, Puccinia triticina, in most spore dimensions. in the morphology of the substomatal vesicle of the urediniospore, and in DNA content in pycniospore nuclei. Similarly to P. triiicina isolates from wheat, isolates taken from A. speltoides are compatible with Thalictrum speciosissimum as an aecial host and they are crossed easily with wheat leaf rust isolates. However, isolates from A. speltoides differ from wheat leaf rust in their telial host range. They are avirulent to cultivated wheat cultivars, but attack hundreds of A. speltoides accessions that were immune to wheat leaf rust. This distinct host preference justifies delineation of the newly found leaf rust as a forma specialis (f. sp. speltoides) within P. triticina.