The underlying mechanisms that determine whether two species can form a successful graft union (graft compatibility) remain obscure. Two prominent hypotheses are (1) the more closely related species are, the higher the graft success and (2) the vascular anatomy at the graft junction influences graft success. In this paper these 2 hypotheses are examined in a systematic way using graft combinations selected from a range of (a) phylogenetically close and more distant legume species, (b) species displaying different germination patterns, and (c) scions and rootstocks possessing contrasting stem tissues and vascular patterns. Relatedness of species was not a good predictor of graft compatibility, as vascular reconnection can occur between distantly related species and can fail to occur in some more closely related species. Similarly, neither the stem tissues present at the graft junction nor the vascular anatomy correlated with the success of vascular reconnection. Relatedness and stem anatomy therefore do not appear to be the determining factors in successful vascular reconnection after grafting in legumes. These results are discussed in conjunction with other hypotheses such as the role of auxin. This article is protected by copyright. All rights reserved.

中文翻译：

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是什么推动了种间嫁接联盟的成功？探索系统发育相关性和茎解剖学的作用

决定两个物种是否可以形成成功的移植结合（移植相容性）的潜在机制仍然不清楚。两个突出的假设是 (1) 亲缘关系越密切的物种，移植成功率越高；(2) 移植连接处的血管解剖结构影响移植成功。在本文中，这 2 种假设使用选自以下一系列的嫁接组合进行了系统的检验：(a) 系统发育上较近和较远的豆科植物物种，(b) 具有不同萌发模式的物种，以及 (c) 具有对比茎的接穗和砧木组织和血管模式。物种的相关性不是移植物相容性的良好预测指标，因为血管重新连接可能发生在远缘物种之间，而在一些更密切相关的物种中可能不会发生。相似地，移植物连接处的茎组织和血管解剖结构都与血管重新连接的成功无关。因此，相关性和茎的解剖结构似乎不是豆科植物嫁接后血管重新连接成功的决定因素。这些结果将与其他假设（例如生长素的作用）一起讨论。本文受版权保护。版权所有。