IX-B8, 2012
nced from their
e) files. Polygons
1 both dates (May
lantations' stands:
rage behaviour of
and processing
trometer detects
interval from 350
hannels), of which
Onm with a 1.4nm
ver the range from
erval.
active leaves, one
ine and, randomly,
> collected. At the
aves/tree, of which
cess was done one
18 and June 17%
th were resampled
orne sensor.
y and leaf level for
tral data generated
ackburn (2007). In
seen the clones and
:terogeneity, ratios
SION
show that, between
e greatest losses of
ures 2 and 3). The
nly in this region,
is moment the GTI
ldish leaves with
1se of the carotenes
af scale and in this
ilarity between the
-SE (Figure 3).
e GILMAY
"mn GI JUNE
-0 ue PRIÉSEMAY |
meee PP 135.SE JUNE |
PRIIENW MAY |
PRIN JUNE |
2 Vr 94, ug
ale from 600 to
ees stands: GT1,
/
International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Volume XXXIX-B8, 2012
XXII ISPRS Congress, 25 August — 01 September 2012, Melbourne, Australia
mue GEL MAY
9 GT1 JUNE
© vH PRIM-SE MAY
: gor TTR UE
se ; ce PRIMCNW MAY
oie PRIS. NW JUNE
pr emt
"T Figy 5195 5M, 5204 G31, Wy, Nas Gp, Ag An, be 1p. € Gy Myo
Wavelength (om)
— GTEMAY
7o --GTLJUNE
cu PBIM.SE MAY
—PB255.SE JUNE
cese PBISS-NWE MAY
sepes PBIMCNN JUNE
Reflectance (%)
Sag Ses so 5574 ras a
Wavelength (am)
Figure 3. Spectral behaviour in leaf scale from 600 to 700nm,
for May and June, of the Rubber trees stands: GT1, PB235-SE
and PB235-NW
The carotenes, which have not been spoiled during the period,
are very present on the leaves of the GT1 clone. That fact
explains the maintenance of the spectral behaviour all over the
blue region, from 450 to 480nm (Figures 4 and 5). This spectral
region coincides with the b chlorophyll absorption peak, which
suffered degradation, as well as it covers wide and important
absorption by carotenes, mainly the photo-protectors ones.
weer GTI MAY
me CTI JUNE
vov PB338-SE MAY
o PB1N.SE JUNE
vov PB33ENVE MAY
is PRIMENW JUNE
Reflectance (96)
m
iy 39, M Yong ?u,
Wavelength (nm)
Figure 4. Spectral behaviour in canopy scale from 450 to
480nm, for May and June, of the Rubber trees stands: GT1,
PB235-SE and PB235-NW
t
ev GTI MAY
m GT1 JUNE
cos FRIESE MAY
non PB235_SE JUNE
ur A e FHIMCNW MAY
& d =
à © dp YBIM-NW JUNE
Reflectance (94)
E
©
“iy we; fang ors ny
Wavelength (om)
Figure 5. Spectral behaviour in leaf scale from 450 to 480nm,
for May and June, of the Rubber trees stands: GT1, PB235-SE
and PB235-NW
Around 550nm, when the anthocyanin absorption peak
happens, the increase of reflectance was observed for all the
three stands, exceeding for the PB235-NW stand in canopy
scale (Figures 6 and 7). It is interesting to observe that this fact
happened for both anthocyanin and chlorophylls and only for
this stand, and in this specific scale. This spectral behaviour
indicates a close relation between these compounds, what is
also observed by Blackburn (2007) and Amaral et al. (2009).
ws GTI MAY
— GTI JUNE
cse PBIM-SE MAY
c B235-SE JUNE
M. ae PB235-NW MAY
vete PRIMCNW JUNE
s Se, su A Sarg 52,
Wavelength (am)
Figure 6. Spectral behaviour in canopy scale, for May and June,
in the region of 550nm of the Rubber trees stands: GT1, PB235-
SE and PB235-NW
Figure 7. Spectral behaviour in leaf scale, for May and June, in
the region of 550nm of the Rubber trees stands: GT1, PB235-
SE and PB235-NW
As it is observed in the spectral regions already presented, for
the stands of the same clone, it is visible a pattern in the spectral
behaviour that is different from that for GT1 clone.
The ratios among the spectra of the three stands indicated in the
region VIS (400-700nm) a pattern for the stands of the PB235
clone, which differs from that for the GT1 clone (Figure 8 and
9). That demonstrates that, regardless of the environmental
conditions and the period of data collection, in this spectral
region, the genetic is highlighted as the origin of spectral
differences. Clearly, there is a behaviour pattern among the
ratios GTI/PB235-SE and GTI/PB235-NW that differs from
that found among clones PB235. This behaviour is close to
opposite around 550 nm, in the May data, in leaf and canopy
scales. This also happens in leaf scale around 650 nm and is
particularly significant in June data.
c GIHPBIM.SE MAY
— GTIPBINCNW MAY
o FB23-SEOBISS-NW MAY
Ratio value
75
May 416 726, 32,7356 Dp Kay Wry Sty Ry Ny Sy Sup, Sw Sas 61,024,418, 68) 072 814
Wavelengtb (n)
e GELPRISS-SE JUNE
am GTUPBT3S NW JUNE
ann PRIIE-SE/PRIIS-NW JUNE
me M AE MR ARE
Wavelength (am)
Figure 8. Ratios among spectra of the Rubber trees stands (GT1,
PB235-SE and PB235-NW) from 400-700nm for May and
June, in canopy scale
cr GTUFBAISSE MAY
mec GTLFBIS-NW MAY
mn PBIS-SEPBIISNW MAY
Tag Ie V20 4 V2 386,2 ai 439 $925 Ty Msp Nu NG ayy Seg gy np Soy Win, NG Mig Beg
Wavelength (nm)
ere GEMPBIIT-SE JUNE
c—GIDPB213-NW JUNE
cose PRIMSEPBIS-NW JUNE
Ratío value
28 r
Yong fn 19 H8, 904,381, 25 Slr g Rs, Ne Ta Sup; Suu 595,9 M0 4 EI R3 any Bg
Wavelength (nm)
Figura 9. Ratios among spectra of the Rubber trees stands (GT1,
PB235-SE and PB235-NW) from 400-700nm for May and
June, in leaf scale
