Name: VALÉRIA PANCIERI SALLIN
Publication date: 25/02/2022
Advisor:
Name |
Role |
|---|---|
| SARA DOUSSEAU ARANTES | Advisor * |
Examining board:
| Name |
Role |
|---|---|
| ANTELMO RALPH FALQUETO | Internal Examiner * |
| SARA DOUSSEAU ARANTES | Advisor * |
Summary: Sallin, Valéria Pancieri; MSc; Federal University of Espirito Santo; February 2022;
Rooting response of contrasting genotypes of Coffea canephora using IBA;
Advisor: Sara Dousseau Arantes; Co-advisor: Jean Marcel Sousa Lira.
In the climate change scenario, WHERE there is a tendency to increase in temperature
and lack of rain and water stress is imminent, it is essential in economically important
crops such as conilon coffee, to adopt techniques and technologies that optimize the
expression of morphological characteristics that help in the coping with adversity, such
as root structure and architecture. And among the available strategies to optimize this
parameter, there is indole-3-butyric acid (IBA) for use in cutting propagation, however
its effect may vary depending on genetics among other factors. Therefore, the present
study aims to characterize morphological components of contrasting genotypes of
conilon coffee, in propagation by cuttings and addition of IBA, emphasizing seedling
quality and root parameters. For this, the production of seedlings was carried out in a
randomized block design, 2 x 2 factorial scheme, the first factor being composed of
contrasting genotypes in rooting, LB1 and 02, and the second factor consisting of
application or not of indole acid. 3-butyric acid (AIB) in cutting propagation. After 120
days of cultivation in a nursery, destructive analyzes were carried out to determine the
length and diameter of the stem, number of leaves, leaf area, root dry mass, shoot and
total, Dickson quality index, length, surface area and volume. of roots in ten diameter
classes, as well as xylem anatomy in stem, leaves and roots. Data were submitted to
analysis of variance, Skott-Knott cluster test at 5% probability, correlation and principal
components analysis in R Studio software, while bar graphs with standard error of the
mean were made in Sigma Plot software. For the morphology parameters of the aerial
part of the seedlings, there was no interaction between the evaluated factors, and
within the isolated of each one there was a difference only for the leaf area in the
treatments related to the AIB. the AIB promoted an increase in the length and surface
area of thin roots and in the volume of thick roots in both genotypes, but more
expressively for 02, which also had added anatomy parameters, in terms of mesophyll,
stomatal density and thickness of the root. root cortex. LB1, on the other hand,
presented itself as a genotype that was not very responsive to treatment with IBA, with
a natural ability to allocate high dry mass in the roots and stomatal density reflected in
a large and voluminous root system. Therefore, the AIB presents itself as an interestingvii
tool in the propagation of the coffee tree, such as 02, WHERE adjustments are modulated
at the anatomy, mass allocation and root growth, increasing the quality of seedlings
without compromising the aerial part aspect.
