INFIVE   05416
INSTITUTO DE FISIOLOGIA VEGETAL
Unidad Ejecutora - UE
artículos
Título:
Leaf traits related to productivity in Populus deltoides during the post flooding period
Autor/es:
RODRÍGUEZ MARÍA EMILIA; ACHINELLI, FABIO; LUQUEZ VIRGINIA M.C.
Revista:
TREES-STRUCTURE AND FUNCTION
Editorial:
SPRINGER
Referencias:
Lugar: Berlin; Año: 2015 vol. 29 p. 953 - 960
ISSN:
0931-1890
Resumen:
Flooding stress induces changes in trees at plant
and leaf level that can reduce growth and productivity. In this
work, we explored changes in leaf traits related to productivity
during the post-flooding period in three poplar clones
with different degrees of flooding sensibility. Our hypothesis
was that changes in leaf traits could lead to a higher photosynthetic
activity in the post-flooding period to compensate
for the reduction in carbon fixation under flooding. Plants
were grown in pots in a greenhouse. Flooding was induced by
filling the pots with tap water up to 5 cm over the surface soil
for 28 days. After this period, flooding ended and plant recovery
was followed for 44 days. Flooding decreased total
leaf area, stomatal conductance and photosynthetic rate, but
leaf size, stomatal, leaf area, chlorophyll and Rubisco content
were not affected. Stomatal index was reduced in one clone
and leaf thickness was increased in another one. During the
post-flooding period, the formerly flooded plants of all clones
produced leaves with increased area and thickness compared to the control plants, but specific leaf area and chlorophyll
and Rubisco content were not altered. Stomatal index was
only decreased in one clone. The leaves expanded in the postflooding
period did not increase their photosynthetic capacity,
but had a higher water use efficiency and a lower
stomatal conductance. The plants compensated for the reduced
growth under flooding by substituting the leaf area loss
instead of increasing the photosynthetic activity.