Article Sidebar
Article Details
NAJ supports free online communication and exchange of knowledge as the most effective way of ensuring that the fruits of research and development practice are made widely available. It is therefore committed to open access, which, for authors, enables the widest possible dissemination of their findings and, for readers, increases their ability to discover pertinent information. The Journal adopts and uses the CC: BY license and is open access. This license lets others distribute, remix, adapt, and build upon your work, even commercially, as long as they credit you for the original creation. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the Journal’s published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal. Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work. Copyright for articles published in this Journal is retained by the Journal.
Main Article Content
EFFECT OF PHYTOHORMONE AND PHENOLOGY ON DOMESTICATION OF Pentaclethra macrophylla Benth. BY MARCOTTING IN DERIVED SAVANNA ZONE OF SOUTHEAST NIGERIA
Abstract
Marcotting is a method of vegetative propagation which still finds its relevance in the present day domestication and routine plant multiplication efforts of indigenous fruit trees including, Pentaclethra
macrophylla (Fabaceae family). There is dearth of information regarding propagation of P. macrophylla
by marcotting. Hence effects of phytohormone application and tree phenology on P.macrophylla
propagation by marcotting were investigated in Ishiagu located in the derived savanna agro-ecological zone of South-east Nigeria. Marcotting of P. macrophylla, effect of Indole Butyric Acid (IBA) and Naphthalene Acetic Acid (NAA) phytohormones application (range 0.1% – 0.3% and 0.05% –
0.1% concentrations, respectively) and different marcotting seasons were studied in field experiments. The plots were laid out in a randomized complete block design and replicated three times. Three branches of each tree replicate were marcotted at two-month interval (starting from January to November) across the year. Percent callus and adventitious roots formation, number and length of adventitious roots were assessed. Data were analysed using descriptive statistics and ANOVA.Results of combined effects of IBA and NAA on rooting of marcotted branches showed that both auxin treatments had generally unimpressive adventitious root production effect on P. macrophylla at eight weeks after marcotting (WAM). The branches however, produced callus tissues freely around the girdled portions of branches,
which is a definite indication of ensuing rooting process that might have been delayed. Only treatment of 0.2% IBA+0NAA gave significantly highest mean with 100% callusing at 8 WAM; while least mean (50%) callusing was produced with 0.1% IBA+0 NAA and 0.2% IBA+0.05% NAA. July marcotted branches produced significantly highest percent callus (100%), adventitious roots
(75%), number of roots (2.2±0.8) and root length (34.2±8.7cm) among the different marcotting seasons.
