SPORE SURFACE MORPHOLOGY OF HAWAIIAN ACACIA RUST FUNGI
SPORE SURFACE MORPHOLOGY OF HAWAIIAN ACACIA RUST FUNGI
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夏威夷金合欢锈菌孢子表面形态
DOI：
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发表时间：
1985
期刊：
影响因子：
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通讯作者：
C. S. Hodges
中科院分区：
文献类型：
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作者：
D. Gardner;C. S. Hodges
相思属特有种锈菌的某些孢子状态。在夏威夷，以有花梗的孢子为代表，孢子壁网状，赤道生殖孔系列。这些孢子状态包括锈孢子和夏孢子的大环形式的Uro？myces digitatus、锈孢子U. koae和刺槐内孢（Endoraecium acaciae）冬孢子和E.夏威夷语。这种类型的网状孢子在锈菌中显然是罕见的。孢子装饰？夏威夷锈菌的形态与在澳大利亚、新西兰、台湾和日本的其他相思锈菌上发现的相似。形态和寄主的相似性可能表明这些类型之间的系统发育关系密切。在特有的相思树上有四种不同的锈病。在夏威夷：三个恩？demic？Koae单胞锈菌阿尔斯，金合欢内孢囊菌（Endoraecium acacaciae Hodges & Gardner）和金合欢内孢囊菌（E.哈吉斯&加德纳公司和一种指状单胞锈菌（Uromyces digitatus Wint.）[=U. phyl？lodiorum（B. & Br.）McAlp.]，原住民（5）。一种地方性的微生物？U的循环变体。digitatus也发生在夏威夷（5）。我们认为地方性锈菌彼此密切相关（就像地方性相思树寄主本身一样），可能是从美国相思树进化而来。指状的有证据表明，这些真菌之间的分歧进化仍在进行中（5）。康明斯和平冢（2）将U. digitatus、毛茛U. koae和U bicinctus McAlp。最近恢复的Atelocauda属（见5）。最近，小野（13）确定，美国。hyalospora Sawada不属于单胞锈菌属，暂将其归为无尾亚目。然而，由于生活史和寄主属的不同，现在包括在Atelocauda，小野sug？表明需要对该属进行更详细的研究。我们选择在这里保留原始的二项式，以提供与我们以前的研究（4，5）的连续性。本地夏威夷相思锈病迄今认识到是不寻常的，在aecial和夏孢子状态（后者存在的地方）的每一个物种是charac？以孢子为特征，孢子壁紧密，网状，有几个明显的赤道生殖孔。各种的特殊状态为类夏孢子。这些共同的特征表明夏威夷物种和美国物种之间有着密切的关系。hyalospora、U. bicinctus和Uromycladium spp.，哪个在里面？澳大利亚和台湾（5）。在夏威夷相思树锈菌中发现的网状锈孢子或夏孢子显然是罕见的。Littlefield和Heath（10）根据锈孢子的疣状或棘状突起将锈孢子的发育分为四种类型。除少数例外，尿孢子被分类为棘孢。的特殊
Certain spore states of rust fungi on endemic Acacia spp. in Hawaii are typified by pedicellate spores with reticulate wall ornamentation and a series of equatorial germ pores. These spore states include aeciospores and urediniospores of the macrocyclic form of Uro? myces digitatus, aeciospores of U. koae, and teliospores of Endoraecium acaciae and E. hawaiiense. Reticulate spores of this type are apparently rare among the rusts. Spore orna? mentation of the Hawaiian rusts is similar to that found on other Acacia rusts in Australia, New Zealand, Taiwan, and Japan. The similarity of morphology and host may indicate a close phylogenetic relationship among these forms. There are four distinct rusts on endemic Acacia spp. in Hawaii: three en? demic? Uromyces koae Arth., Endoraecium acaciae Hodges & Gardner, and E. hawaiiense Hodges & Gardner?and one, Uromyces digitatus Wint. [=U. phyl? lodiorum (B. & Br.) McAlp.], believed to be indigenous (5). An endemic micro? cyclic variant of U. digitatus also occurs in Hawaii (5). We consider the endemic rust species to be closely related to one another (as are the endemic Acacia hosts themselves) and probably to have evolved from U. digitatus. There is evidence that divergent evolution among these fungi is still in progress (5). Cummins and Hiratsuka (2) placed U. digitatus, U. koae, and U bicinctus McAlp. in the recently revived genus Atelocauda (see 5). More recently, Ono (13) determined that U. hyalospora Sawada did not belong in Uromyces and placed this species in Atelocauda for the present. However, because of dissimilarities in life cycles and host genera of the species now included in Atelocauda, Ono sug? gested the need for more detailed study of this genus. We have chosen to retain the original binomials here to provide continuity with our previous studies (4, 5). The native Hawaiian Acacia rusts recognized thus far are unusual in that the aecial and the uredinial states (where the latter exist) of each species are charac? terized by spores with walls that are closely and strongly reticulate and have several prominent equatorial germ pores. The aecial state of each species is uredinoid. These common features suggest a close relationship between the Hawaiian species and U. hyalospora, U. bicinctus, and Uromycladium spp., which are in? digenous to Australia and Taiwan (5). Reticulate aeciospores or urediniospores ofthe type found among the Hawaiian Acacia rusts are apparently rare. Littlefield and Heath (10) classified aeciospore ornamentation into four types based on their verrucose or echinulate processes. Urediniospores, with few exceptions, were classified as echinulate. The exceptional