ABSTRACT Root-knot nematode Meloidogyne mayaguensis Rammah & Hirschmann is a limiting factor in guava tree (Psidium guajava L.) production around the world. An alternative to address this problem is the use of resistant root-knot nematode rootstocks. However, the guava nursery system which is based on herbaceous stem cutting propagation needs to be modified as a rootstock produced via cutting must be grafted with nematode susceptible commercial cultivars. Thus, the objective of this study was to verify the feasibility of omega bench grafting in guava tree propagated by herbaceous stem cutting. Root-knot nematode tolerant ‘Tailandesa’ herbaceous stem cuttings was used as rootstock and ‘Paluma’ and ‘Pedro Sato’ as commercial cultivar grafts. It was observed 100% rooting, cutting survival, and leaf retention on rootstocks grafted with ‘Paluma’ and ‘Pedro Sato’. However, grafting take was not successful as the tissues presented fast oxidation, dehydration and graft death in both commercial cultivars. However, the immersion of the grafts into a solution containing 2.0% citric acid and 1.0% ascorbic acid controlled the oxidation process and resulted in 28.6% and 37.5% successful grafting in the combinations ‘Paluma’/‘Tailandesa’ and ‘Pedro Sato’/’Tailandesa’, respectively.

中文翻译：

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欧米茄长台嫁接在草本茎扦插繁殖的番石榴树（Psidium guajava L.）中的可行性

摘要 根结线虫 Meloidogyne mayaguensis Rammah & Hirschmann 是世界各地番石榴树 (Psidium guajava L.) 生产的限制因素。解决这个问题的另一种方法是使用抗性根结线虫砧木。然而，基于草本茎扦插繁殖的番石榴育苗系统需要修改，因为扦插产生的砧木必须与线虫易感商业品种嫁接。因此，本研究的目的是验证欧米茄台式嫁接在草本茎扦插繁殖的番石榴树中的可行性。耐根结线虫的'Tailandesa'草本茎插条用作砧木，'Paluma'和'Pedro Sato'用作商业栽培品种移植物。观察到 100% 生根，切割成活率，以及嫁接“Paluma”和“Pedro Sato”的砧木叶片保留。然而，嫁接并不成功，因为组织在两个商业品种中都表现出快速氧化、脱水和移植死亡。然而，将移植物浸入含有 2.0% 柠檬酸和 1.0% 抗坏血酸的溶液中控制了氧化过程，并在“Paluma”/“Tailandesa”和“Pedro Sato”/ 'Tailandesa'，分别。