Rooting of herbaceous cuttings of Malpighia emarginata D.C. (CAMB-06 and APU-04 selections) associated with the use of indolebutyric acid and liquid extract of Cyperus rotundus L.

Débora Thaís Mühlbeier,Sérgio Ruffo Roberto,Renata Koyama,Osmar Jose Chaves Junior,Neusa Maria Colauto Stenzel,Ibrar Hussain

doi:10.1590/0100-29452020454

Débora Thaís Mühlbeier, Sérgio Ruffo Roberto + Show 4 more

Open Access

https://doi.org/10.1590/0100-29452020454

Copy DOI

Abstract

Abstract The objective of this work was to evaluate the rooting of herbaceous cuttings of CAMB-06 and APU-04 acerola cherry selections associated with the use of indolebutyric acid (IBA) and a concentration of aqueous extract of coco-grass. Cuttings were treated by immersion with different concentrations of IBA (0; 1,000; 2,000; 3,000; 4,000 mg L-1) and one application of aqueous extract of coco-grass in proportion 100% and placed to root in plastic boxes containing vermiculite. The experimental design was a completely randomized in a 2×6 factorial arrangement (two acerola cherry selections and six solutions for rooting) with four replicates of ten cuttings. After 90 days of cutting, the following variables were evaluated: cutting survival (%); leaf retention (%); rooted cuttings (%); sprouting (%); number of roots per cutting (%); length of roots (cm) and dry mass of roots per cutting (g). It was concluded that the application of IBA at 4,000 mg L-1 presented a better root development, resulting in a higher percentage of rooted cuttings and higher number and dry mass of roots in relation to IBA at 0 mg L-1 for CAMB-06 selection, while the APU-04 selection can be efficiently multiplied by herbaceous cuttings without the use of IBA. Under the conditions that the trials was conducted, the application of 100% aqueous extract of coco-grass was not effective in promoting the rooting of cuttings of CAMB-06 and APU-04 acerola cherry selections.

Highlights

The acerola (Malpighia emarginata DC) is a native fruit of the Caribbean Islands, Central America and North South America
Given the need for large-scale nursery production and the lack of information on the application of cocograss extract as rooting promoters in the vegetative propagation of acerola, this work aimed to evaluate the rooting of herbaceous cuttings from the acerola selections CAMB-06 and APU-04 associated with the use of different concentrations of indolbutyric acid and an aqueous extract concentration of coco-grass
There was no significant interaction between selections and concentrations of indolebutyric acid (IBA) and the aqueous extract of coco-grass regarding the percentage of survival and leaf retention of cuttings (Table 1), and no significant differences were observed between these factors, except for leaf retention between selections, in which APU-04 selection presented higher mean (84.6%) when compared to CAMB-06 (81.3%)

Summary

Introduction

The acerola (Malpighia emarginata DC) is a native fruit of the Caribbean Islands, Central America and North South America. Due to its high nutritional value, mainly as a source of vitamin C, it has dispersed to other regions of the world and found conditions in Brazil because of the favorable soils and climate for its cultivation, becoming one of the few countries that commercially cultivate acerola (RITZINGER; RITZINGER, 2011). Vegetative propagation presents some obstacles, such as low rooting percentage, it is still preferable to multiplicatef acerola, since obtaining cuttings by cutting is faster and simpler, ensuring the genetic characteristics of the plants, as well as early and uniform production (MENDES et al, 2012). The Acerola Breeding Program developed by the Agronomic Institute of Paraná (IAPAR) has obtained some selections adapted to subtropical conditions, which showed promising agronomic characteristics for consumption and industrialization, among them CAMB-06 and APU-04. Few is known about the vegetative propagation by cutting of these selections

Objectives

Methods

Results

Conclusion