Graft compatibility indicators between ‘Paluma’ guava and new Psidium hybrids

•Psidium guineense x P. cattleianum is potential compatible with the ‘Paluma’ guava.•Guava grafted onto hybrids showed less vigor than nongrafted guava plants.•Regrowth after pruning can be used as indicator of graft compatibility.•None of the rootstocks limited the photosynthesis of the plant crown...

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Bibliographic Details
Published in:Scientia horticulturae 2024-12, Vol.338, p.113772, Article 113772
Main Authors: dos Santos, Raudielle Ferreira, Marinho, Cláudia Sales, Galvão, Sydney Pereira, da Rocha Silva, Rachel Martins, de Paula Bernado, Wallace, de Souza, Guilherme Augusto Rodrigues, Baroni, Danilo Força, Campostrini, Eliemar, Costa, Ernany Santos
Format: Article
Language:English
Subjects:
biometry
Gas exchange
graft compatibility
guavas
Hybrid rootstock
Meloidogyne enterolobii
photosynthesis
Psidium
Psidium cattleianum
Psidium guajava
regrowth
rootstocks
spring
Stem morphology of grafted plants
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Summary:•Psidium guineense x P. cattleianum is potential compatible with the ‘Paluma’ guava.•Guava grafted onto hybrids showed less vigor than nongrafted guava plants.•Regrowth after pruning can be used as indicator of graft compatibility.•None of the rootstocks limited the photosynthesis of the plant crown. The use of interspecific Psidium hybrids as rootstock resistant to the nematode Meloidogyne enterolobii is a strategy that offers more security for the establishment of new guava orchards. However, indicating new rootstocks for commercial guava crops requires assessing their graft compatibility. The aim of this study was to assess graft compatibility between ‘Paluma’ guava and new hybrids produced by crossing P. guineense and P. cattleianum, based on biometric indicators, photosynthetic traits and crown response to formative pruning. The treatments consisted of ‘Paluma’ nongrafted plants (control) or grafted onto new hybrids coded as H237, H242 and H251. Stem height and diameter were assessed until 840 days after grafting, and photosynthetic traits in spring and fall, after two formative prunings. Regrowth potential was quantified after each pruning. Photosynthetic capacity, stem biometry and regrowth ability after pruning indicate preliminary graft compatibility between ‘Paluma’ guava and rootstock from P. guineense x P. cattleianum crosses.
ISSN:0304-4238
DOI:10.1016/j.scienta.2024.113772