Wood structure, xylem functionality and growth of six Salix clones in two sites with different environmental stress in Argentina
The aims of the study were to evaluate the effects of abiotic stress (plantation site) and genotype (clone) on the wood anatomy and density of six Salix (willow) clones at three ages (2, 7, and 12 years), and the impact of these effects on the theoretical xylem hydraulic conductivity (Ks) and grow...
| Main Authors: | , , , , , |
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| Format: | info:ar-repo/semantics/artículo |
| Language: | Inglés |
| Published: |
Sociedade de Investigações Florestais
2019
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| Subjects: | |
| Online Access: | http://hdl.handle.net/20.500.12123/5904 http://www.scielo.br/pdf/rarv/v42n1/0100-6762-rarv-42-01-e420204.pdf http://dx.doi.org/10.1590/1806-90882018000100010 |
| Summary: | The aims of the study were to evaluate the effects of abiotic stress (plantation site) and genotype
(clone) on the wood anatomy and density of six Salix (willow) clones at three ages (2, 7, and 12 years),
and the impact of these effects on the theoretical xylem hydraulic conductivity (Ks) and growth. The clones
studied were ´Ragonese 131-25 INTA´, ´Ragonese 131-27 INTA´ and “250-33” (originated from crosses between
Salix babylonica and S. alba), ´Barrett 13-44 INTA´ and “NZ 26992” (originated from crosses between S.
matsudana and S. alba), and the clone S. babylonica var. sacramenta ´Soveny Americano´. They were planted
in two sites of the province of Buenos Aires, Argentina, with different abiotic stress: i) the Paraná River
Delta, a site with recurrent floods, and ii) a continental site with lower water availability and no floods. The
vessel morphometry, wood density, Ks, and current annual increments at the three ages were determined.
The clone x site interaction was the source of variation with greatest impact, being this significant for vessel
diameter, Ks, wood density and growth. This means that, depending on the type of stress at the plantation
site, the clones responded differently, showing differences in their structure, functionality, and wood production.
The results showed that the clones Soveny Americano and 26992 were better suited to stress by flood, whereas
clones 131-25, 131-27, 250-33 and 13-44 were better adapted to moderate drought conditions, with responses
at the level of the xylem and wood density, and therefore at the level of wood production. |
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