F
resea
r
c
h
b
r
ief ing
F
ef
r
uitg
r
owe
r
.co.uk
ThE FrUITGrOWEr • FEbrUAry2017
G
r
owing
r
asp
b
e
rr
ies in pol
y
tunnels is
b
ecomingmo
r
e
commonplace. resea
r
c
h
e
r
s in Finland examined t
h
e effect of
h
ig
h
-tunnel g
r
owing conditions on
y
ield and
b
e
rry
qualit
y
in t
hr
ee
flo
r
icane
r
asp
b
e
rr
ies - GlenAmple, GlenDee, andMau
r
inMakea,
unde
r
h
ig
h
-latitude no
r
t
h
e
r
n conditions (
ScientiaHorticulturae
).
Compa
r
ed toopen-fieldp
r
oduction,
y
ieldpe
r
canewas dou
b
le
in t
h
e pol
y
tunnels. F
r
uit
b
ioactive p
r
ope
r
ties, includingp
h
enolic
compounds and antioxidant activit
y
, we
r
e not affected
by
t
h
e
pol
y
tunnel g
r
owing conditions. GlenDee f
r
uit
h
ad t
h
e lowest
concent
r
ation of total p
h
enolics. In t
h
e open field, t
h
e total
p
h
enolics content inGlenAmple
b
e
rr
ieswas 48%
h
ig
h
e
r
t
h
an
GlenDee. be
rr
ies g
r
own in t
h
e open field
h
ad a
h
ig
h
e
r
content
of solu
b
le solids (b
r
ix) and
h
ig
h
e
r
tit
r
ata
b
le acidit
y
t
h
an
t
h
ose g
r
own in t
h
e tunnel.
Additionall
y
, GlenAmple and
Mau
r
inMakea
b
e
rr
ieswe
r
e
sweete
r
t
h
anGlenDee
b
e
rr
ies. In conclusion,
r
asp
b
e
rry
p
r
oduction in
pol
y
tunnelsma
y
p
r
ovidemajo
r b
enefits t
hr
oug
h
inc
r
eased f
r
uit
y
ield.W
h
ile f
r
uit
b
ioactive p
r
ope
r
tieswe
r
e not affected, senso
ry
tastema
y b
e diffe
r
ent
h
oweve
r
, as
b
e
rry
sweetness and acidit
y
we
r
e dec
r
eased in t
h
e
h
ig
h
tunnel.
28
yield and
b
e
rry
qualit
y
in t
hr
ee
r
asp
b
e
rry
cultiva
r
s
g
r
own in pol
y
tunnels
Impo
r
tance of meta
b
olite dist
r
i
b
ution in apple f
r
uit
Apples a
r
e one of t
h
emost studied of f
r
uits,
b
ut t
h
e
r
e is
inadequate info
r
mation as to
h
ow t
h
emeta
b
olites a
r
e
dist
r
i
b
uted inside t
h
e f
r
uit. Scientists inSlovenia pe
r
fo
r
med a
stud
y
of 12diffe
r
ent samplingpositions in apple, six on eac
h
side of t
h
e f
r
uit (sunlit and s
h
aded), using t
h
e two cultiva
r
s
Jonagold andG
r
ann
y
Smit
h
(
ScientiaHorticulturae
).
Samples along t
h
e equato
r
ial plane of t
h
e f
r
uit va
r
iedmo
r
e
t
h
an t
h
ose t
hr
oug
h
t
h
e
h
eig
h
t of t
h
e f
r
uit. T
h
e fles
h
sample in
t
h
e vascula
r
r
egion of apples
h
as a
h
ig
h
e
r
content of p
h
enolic
compounds, especiall
y
di
hy
d
r
oc
h
alcones, w
h
en compa
r
ed to
ot
h
e
r
fles
h
samplingpositions. T
h
e dist
r
i
b
ution of suga
r
s and
o
r
ganic acids also va
r
ied
b
etween positions. T
h
e
r
esults can
h
elpwit
h
mo
r
e accu
r
ate sampling of apple f
r
uits and a
r
e t
h
e
b
asis fo
r
a
b
ette
r
unde
r
standing of meta
b
olite dist
r
i
b
ution in
apples.
G
r
owt
h
-p
r
omoting
rh
izo
b
acte
r
ia
(PGPr) in sou
r
c
h
e
rr
ies
Using t
h
e sou
r
c
h
e
rry
va
r
iet
y
Küta
hy
a, one of t
h
emost widel
y
p
r
oduced cultiva
r
s in Tu
r
ke
y
,
r
esea
r
c
h
e
r
s at SelçukUnive
r
sit
y
studied t
h
e effects of
Bacillusmycoides
T8 and
Bacillus
subtilis
OSU-142
b
acte
r
ia st
r
ains on
y
ield, f
r
uit p
r
ope
r
ties and
t
r
ee-g
r
owt
h
of
Prunusmahalep
(
Erwerbs-Obstbau
).
Flo
r
al and folia
r
applications of T8, OSU-142 andT8plus
OSU-142 significantl
y
inc
r
eased t
h
e
y
ieldpe
r
t
r
ee, s
h
oot lengt
h
and leaf a
r
ea, compa
r
edwit
h
t
h
e cont
r
ol. T
h
e
h
ig
h
est s
h
oot
lengt
h
was found in t
h
e T8plusOSU-142 application, w
h
ile t
h
e
least valuewas found in t
h
e cont
r
ol. T
h
e
y
ield inc
r
eased f
r
om
8.229kg/t
r
ee
(in cont
r
ol) to13.663kg/t
r
ee (T8) and to
11.660kg/t
r
ee
(T8plusOSU-142). T
h
e
r
esults suggest
t
h
at bacillus
T8 andbacillusOSU-142, alone o
r
in com
b
ination,
h
ave a potential fo
r
t
h
e en
h
ancement of
y
ield andplant g
r
owt
h
in sou
r
c
h
e
rr
ies.
byDr DavidPennell
resea
r
c
h
b
r
iefing
