Báo cáo lâm nghiệp: "Limitation of photosynthetic activity by CO 2 availability in the chloroplasts of oak leaves from different species and during drought" pdf
...
deviation
from
linearity,
con-
firming
that
even
under
stress
conditions,
Original
article
Limitation
of
photosynthetic
activity
by
CO
2
availability
in
the
chloroplasts
of
oak
leaves ...
availability
in
the
chloroplasts.
Finally,
the
CO
2
availability
decreased
with
increasing
drought
in
the
soil,
stressing
the
importance
of...
... PPFD became probably saturating at a Ψ
m
lower than
2. 5 MPa, producing the increase of NPQ in N. dombeyi and
the concomitant decrease in Fv/Fm, ∆F/Fm
and qP.
In conclusion, this study provides ... at the Universidad Austral, Valdivia,
Chile. During June 20 04, 100 two-three years old seedlings of N.
dombeyi and N. nitida were collected from semi-shade in secon...
... effect of GA and cold in the case of argan seed
germination. From the results of this study, dormancy can be
broken using GA or cold storage, but the presence of GA
appears to speed up germination ... germination avoiding long exposure of the
seeds to contamination. This probably has to do with the fra-
gility of the argan nut contained within the slightly crac...
... within the guide curve method [25 27 , 41, 47, 51].
All of these studies together covered the three main areas of dis-
tribution of the species in Spain: the Sistema Central Moun-
tains, the Sistema ... re-measured in
the winter of 20 03. These plots were selected for developing a dynamic
growth model for the species in the area of study, thus the initia...
... ranged from 140 to 28 0 µm in all of the good acoustic
woods and from 60 to 160 µm in the poor acoustic woods. The
vessel frequency/mm
2
ranged from 2 to 8 (up to 18 in Commi-
phora) in the “good” ... growth
rings, with the ring parallel to the tangential grain of the wood. The
longitudinal direction was colinear to the longitudinal axis of the s...
...
dehesas
in
the
Iberian
Peninsula
and
one
of
the
most
important
forest
species
occurring
in
Por-
tugal.
The
most
striking
feature
of
these
oak
stands
is
their
savanna-like
structure. ...
studied.
We
investigated
the
variation
of
stom-
atal
conductance
within
the
crown
of
a
cork -oak
(Q
suber
L),
by
studying
its
diurnal
and
season...
...
03
or
S0
2
could
lead
to
H2 02
production
(Tingey
and
Taylor,
19 82;
Khan
and
Malhotra,
19 82) .
In
order
to
protect
the
plasma
membrane
and
the
compo-
nents
of
the
extracellular ...
exposure,
the
decreased
extracellular
enzyme
activity
and
the
increased
protein
content
in
the
IWF
of
young
needles
could
be
explained
by
the
h...
...
other
coniferous
species
in
copper-
or
boron-deficiency
conditions.
The
similarity
of
the
symptoms
and
the
very
low
trace-element
contents
in
these
sandy
acid
soils
were
consistent ...
in
February
1987
from
10
trees
for
each
treatment.
Adult
pines
(24
yr
old)
2
treatments
were
replicated
3
times
in
a
randomized
bloc:
control
and
22...