F
resea
r
c
h
B
r
ief ing
F
ef
r
uitg
r
owe
r
.co.uk
ThE FrUITGrOWEr •MArCh 2017
28
Edible coatings of essential oils andquality of
r
ed
r
aspbe
rr
ies ove
r
s
h
elf-life
AB
r
azilian
r
esea
r
c
h
team
h
as beenwo
r
king todevelop
st
r
ategies fo
r
inc
r
easing t
h
e s
h
elf-life of
r
ed
r
aspbe
rr
ies by
p
r
eventingmic
r
o-o
r
ganism g
r
owt
h
(
Journal of theScience
of FoodandAgriculture)
.
F
r
uits coatedwit
h
alginate plus lemon essential oil (0.2%) o
r
o
r
ange essential oil (0.1%)
h
ad less
r
ed skin t
h
an t
h
e
r
emaining samples afte
r
15days of sto
r
age. T
h
e edible
coatings supplementedwit
h
t
h
e essential oil of o
r
ange eit
h
e
r
at 0.1% o
r
0.2%we
r
e ve
r
y efficient fo
r
cont
r
olling yeast and
mould g
r
owt
h
afte
r
15days of sto
r
age. To cont
r
ol t
h
e
development of ae
r
obicmesop
h
ilic bacte
r
ia t
h
e use of
essential oil of lemon at
0.2% and essential oil of
o
r
ange at 0.1%we
r
e t
h
e
most efficient. T
h
e
application of t
h
e film
imp
r
ovedpost-
h
a
r
vest
quality of
r
aspbe
rr
y, and t
h
e
addition of essential oils of
cit
r
us films p
r
omoted t
h
e in
h
ibito
r
y effect on fungi and
bacte
r
ia g
r
owt
h
afte
r
15days of sto
r
age, wit
h
out c
h
anging
quality pa
r
amete
r
s.
byDr DavidPennell
resea
r
c
h
B
r
iefing
Influence of deficit i
rr
igation on st
r
awbe
rr
y f
r
uit quality
Low-fieldMrI fo
r
quality assessment of Confe
r
ence pea
r
s sto
r
ed inCA
T
hr
ee diffe
r
ent i
rr
igation
r
egimes - uppe
r
limit of field capacity
(UFC) (
−
12 kPa); lowe
r
limit of field capacity (LFC) (
−
33 kPa)
anddeficit i
rr
igation (DI) (-70 kPa) we
r
e establis
h
edon silty-
loam soil andmonito
r
edwit
h
tensiomete
r
s by a
r
esea
r
c
h
team
at Unive
r
sity of Ljubljana, Slovenia (
Journal of theScienceof
FoodandAgriculture)
).
T
h
e yield and f
r
uit quality of Flamenco andEve’sDelig
h
t
eve
r
bea
r
ing st
r
awbe
rr
y cultiva
r
swe
r
emonito
r
ed. T
h
e aimof
t
h
e studywas to evaluate t
h
e effect of diffe
r
ent i
rr
igation
r
egimes on t
h
e content of suga
r
s, o
r
ganic acids andp
h
enolic
compounds. Deficit i
rr
igation significantly inc
r
eased t
h
e content
of suga
r
s (f
r
om 1.1-fold to 1.3-fold), o
r
ganic acids (f
r
om 1.1-
fold to1.3-fold), t
h
ei
r
r
atio (f
r
om 1.1-fold to 1.2-fold) and t
h
e
content of most identifiedp
h
enolics in Flamenco. Conve
r
sely,
h
ig
h
e
r
amounts of total suga
r
s ando
r
ganic acids (1.7-fold to
1.8-fold) we
r
e detected inEve’sDelig
h
t st
r
awbe
rr
ies at UFC
and LFC i
rr
igation. Deficit i
rr
igation gene
r
ally dec
r
eased t
h
e
yieldof Eve’sDelig
h
t. T
h
e
r
esults suggest supe
r
io
r
f
r
uit quality
and taste of Flamenco st
r
awbe
rr
ies g
r
own unde
r
mino
r
deficit
i
rr
igation.
A novel, non-dest
r
uctive and cost-effectivemet
h
od of
evaluating inte
r
nal diso
r
de
r
s occu
rr
ing inConfe
r
ence pea
r
s
sto
r
ed unde
r
cont
r
olled atmosp
h
e
r
e (CA)
h
as been developed
by
r
esea
r
c
h
e
r
s inK
r
akow, Poland (
Postharvest Biology and
Technology
).
A low-fieldMagneticresonance Imaging (MrI) systemwas
used todete
r
minewate
r
content in t
h
e f
r
uit and todistinguis
h
between damaged and
h
ealt
h
y tissues by exploiting t
h
e
diffe
r
ences between t
h
ei
r
r
elaxation times. T
h
e dynamics of t
h
e
induced c
h
angeswit
h
in t
h
emic
r
ost
r
uctu
r
e of t
h
e f
r
uit as a
function of t
h
eCA sto
r
age timewas analysedby
r
epeating t
h
e
measu
r
ements pe
r
iodically ove
r
a six-mont
h
sto
r
age pe
r
iod.
T
h
is couldp
r
ovide a useful tool in futu
r
e fo
r
many sto
r
ed
p
r
oducts.
Leaf blade andpetiole nut
r
ient tests fo
r
Pinot Noi
r
g
r
apevines
G
r
ape g
r
owe
r
s
r
ely on tests of tissue f
r
om leaf blades o
r
petioles fo
r
t
h
e
r
outinemonito
r
ingof vine nut
r
itional
h
ealt
h
, and
fo
r
diagnosingpotential nut
r
ient deficiency o
r
toxicity, but t
h
e
r
e
ismuc
h
debate as tow
h
ic
h
bette
r
r
eflects t
h
e nut
r
ient status of
vines.
T
h
eUSDA-ArS-ho
r
ticultu
r
al C
r
opsresea
r
c
h
Unit, at
Co
r
vallis, O
r
egon compa
r
ed leaf blade andpetiole nut
r
ient
concent
r
ations todete
r
minew
h
ic
h
bette
r
r
elates to vine
g
r
owt
h
, yield andmust nut
r
ient
r
esponses of Pinot Noi
r
g
r
apevines to va
r
ying levels of nit
r
ogen (N), p
h
osp
h
o
r
us (P),
andpotassium (K) supply, usingdata f
r
om a pot-in-pot
vineya
r
d ove
r
fou
r
yea
r
s (
HortScience
).
Leaf blades andpetioleswe
r
e collected at 50%bloom and
50% ve
r
aison in eac
h
yea
r
, andN, P, andK concent
r
ations
we
r
e assessed as p
r
edicto
r
s of leaf a
r
ea at ve
r
aison, p
r
uning
mass at do
r
mancy, yield, andmust nut
r
ient concent
r
ations at
f
r
uitmatu
r
ity. Data f
r
om comme
r
cial Pinot Noi
r
vineya
r
dswas
also used to investigate t
h
e
r
elations
h
ipbetween leaf blade and
petioleN concent
r
ations andmust N levels.
results indicated t
h
at leaf bladeswe
r
e supe
r
io
r
topetioles in
p
r
edicting vine g
r
owt
h
, yield, andmust yeast assimilable
nit
r
ogen (YAN)
r
esponses ac
r
oss awide
r
ange of vineN status
