Propagation of Khaya Anthotheca: Interspecific Grafting With Swietenia Macrophylla and Air Layering

Abstract

Swietenia macrophylla yields high-quality wood; however, its vulnerability to extinction coupled with challenges for its cultivation have brought attention to its replacement for alternative species such as the Khaya anthotheca. The species has been recently introduced to South America, with potential for the production of high-quality wood. However, limited background on breeding and efficient strategies for its vegetative propagation exist. Here, we achieved significant results with the application of cleft grafting and air layering for the propagation of K. anthotheca plants grown from seeds. First, we analyzed the compatibility of scions and rootstocks for intraspecific and interspecific cleft grafting combinations of K. anthotheca and S. macrophylla. Second, air layering was performed in K. anthotheca seedlings irrigated with three nutrient solution (100%, 50% and 25% of the initial concentration of nutrients) combined with the application of indole-3-butyric acid (IBA) to evaluate adventitious rooting. From cleft grafting, we achieved an overall graft compatibility and survival of 48% after 200 days. However, the interspecific combination of S. macrophylla (scion) and K. anthotheca (rootstock) implicated in no compatibility, while the reciprocal resulted in 52% of compatibility. Through air layering, the irrigation with the nutrient solution with at least 50% of the nutrients concentration and with IBA (3.0 or 8.0 g.L-1) resulted in the best adventitious rooting. Overall, we recommend cleft grafting, except for the combination S. macrophylla (scion) and K. anthotheca (rootstock), with no compatibility. Air layering might also be useful for the propagation of K. anthotheca genotypes in breeding programs.

Effects of Biochar Soil Amendment on the Rooting and Early Growth of African Mahogany Species: Khaya Ivorensis And Khaya Grandifoliola

“…These include age of stock plant, leaf area and auxin on K. ivorensis and K. anthotheca [25,19], cutting position of stock-plant in Khaya and Entandrophragma spp. [16], growth regulators on K. senegalensis [4], Indole-3-Butyric Acid on K .ivorensis [10,44].…”

Evaluation of total protein, peroxidase, and nutrients measured by pXRF for the determination of tissue rejuvenation/reinvigoration of Eucalyptus microcorys

“…Total proteins (TCA/acetone/phenol) showed a differentiated behaviour of the protein profile in leaf tissue samples via grafting. Propagation by grafting is a complex process and may introduce several variations in tissues which influence the flow of essential mineral elements, the growth of grafted tissues with the rhizome and the development of parenchymal or bark tissue, in addition to genetic factors of the materials (Barbosa et al 2016;Hartmann et al 2017). The effect of grafting on the protein profile of seedlings of Carya cathayensis Sarg., Lagenaria siceraria (Molina) Standl.…”

“…In this study, grafting resulted in the second highest mean peroxidase activity. Propagation by grafting is a complex process and contributes to several metabolic routes between the graft and the rhizome (Barbosa et al 2016). Studies indicate that, due to the healing process at the grafted site, there is an accumulation of phenolic compounds that increase the activity of enzymes such as peroxidase, disturbing the vascular connections between the graft and rhizome, which hampers tissue compatibility (Pina et al 2017;Baron et al 2019).…”

Concentrations of indolebutyric acid on air-layering of guava cv. Paluma

“…The success of air-layering is influenced by several factors, among them, the diameter of the branches selected and the width of girdling (Sasso et al, 2010), the exogenous application of indolebutyric acid (IBA) (Barbosa Filho et al, 2016;Campos et al, 2015), the substrates used (Naithani et al, 2018), and the time of the year and type of wrapping (Cassol et al, 2015).…”