Author(s):
Brazão, João 
; Gonçalves, Elsa ; Eiras-Dias, José ; Amâncio, Sara
Date: 2010
Persistent ID: http://hdl.handle.net/10400.5/4884
Origin: Repositório da UTL
Subject(s): Vitis vinifera; rooting; auxin; softwood cuttings
Description
From the massal and clonal selection of grapevine developed in Portugal for the last 30 years, clones of several varieties with high genetic
potential were obtained, which are currently used for multiplication to produce base and certified materials.
In order to allow the rapid multiplication of selected clones of grapevine, this work evaluate the effect of the variety (Arinto, Malvasia Fina,
Aragonez, and Trincadeira) on the rooting of softwood cuttings, treated with and without naphthaleneacetic acid (NAA, 0 and 50 μM). The
experimental design used was randomized in a 4 x 2 factorial arrangement (4 varieties x 2 NAA concentrations). Each treatment was
composed by 40 softwood cuttings. Thirty days after planting the cuttings, the following variables were evaluated: percentage of rooted
cuttings, percentage of sprouted cuttings, number of roots per cutting, total root length, longer root and dry root weight.
The results obtained so far allowed to verify that the above variables were not affected by auxin, although a significant effect of the variety
was identified on all the parameters but root dry weight
