INVESTIGADORES
PUNTIERI javier Guido
artículos
Título:
Does water availability regulate biomass partitioning between trunk and branches?
Autor/es:
MAGNIN, A.; TORRES, C. D.; VILLALBA, R.; PUNTIERI, J. G.
Revista:
PLANT BIOLOGY
Editorial:
WILEY-BLACKWELL PUBLISHING, INC
Referencias:
Año: 2017 vol. 19 p. 917 - 925
ISSN:
1435-8603
Resumen:
? The extent to which a vertical trunk is differentiated from its branches is a key trait forthe architecture of trees and may affect interspecific relationships.? In this study, we analysed the effect of soil water availability on biomass partitioningfor Nothofagus pumilio by means of a nursery experiment. Juvenile trees were subjectto three irrigation conditions: no irrigation, intermediate irrigation and high irrigation.Irrigation conditions emulated the mean precipitation of the most representativeenvironments inhabited by N. pumilio.? Changes in soil water availability modified the biomass partitioning patterns of trees.In comparison to the other two conditions, high irrigation caused: (i) a higher ratio ofbiomass partitioning to stems than roots; (ii) more trunk growth in relation to itsbranches; and (iii) more photosynthetic organs relative to the aboveground biomass.Trunk size relative to that of its most recent branches was not increased by water availability.? Water availability may play a significant role in the capacity of N. pumilio for spaceoccupation due to the effects on axis differentiation.