Back to Search Start Over

Visual and anatomical analysis of welding quality x scion survival in Araucaria angustifolia

Authors :
Helena Cristina Rickli-Horst
Cleusa Bona
Bruno Francisco Sant’Anna-Santos
Henrique Soares Koehler
Ivar Wendling
Katia Christina Zuffellato-Ribas
Source :
Acta Scientiarum: Agronomy, Vol 43, Pp e45509-e45509 (2020)
Publication Year :
2020
Publisher :
Eduem (Editora da Universidade Estadual de Maringá), 2020.

Abstract

Grafting is an alternative method for the early production of Araucaria angustifolia seeds, and welding quality is essential for the success of the technique. The objective of this study was to create a classification of welding quality to estimate the percentage of scion survival. The patch and flute grafting techniques were used in a greenhouse and in the field. Survival was evaluated 270 days after grafting (DAG). At 60 DAG, observations of the graft connection region were made with the naked eye, classifying the connections into four welding classes. After 160 DAG, transverse cuts were performed on each class and visually and anatomically evaluated. Flute grafting presented higher initial survival (79%), but at 180 DAG, the survival rate of both techniques was similar (48% for flute and 41% for patch). There was greater scion survival for the class that had only two regions in contact with discontinuity in the bark. Stabilization of survival occurred after 180 DAG, regardless of the welding class. Visually, there were differences in welding quality; however, anatomically, all classes presented vascular connections. The visual welding quality assessment underestimated the percentage of scion survival. However, the vascular connection and development of parenchymatous tissue are promising for diagnosing grafting success.

Details

Language :
English
ISSN :
16799275 and 18078621
Volume :
43
Database :
Directory of Open Access Journals
Journal :
Acta Scientiarum: Agronomy
Publication Type :
Academic Journal
Accession number :
edsdoj.9c95e113c8ce4c8dbd961acc83129fbb
Document Type :
article
Full Text :
https://doi.org/10.4025/actasciagron.v43i1.45509