Table 5.1 Effect on natural bioactive compounds of experiments where supplemental light was
the stress factor on plants or food with commercial interest
Food or cultivar/
Reference
Light condition treatment
Result
Stored tomato fruit var.
Cappricia/Panjai et al.
(2017)
(T1) Darkness (control), (T2)
Darkness + UV, (T3) R, (T4)
R + UV. UV of 4.98 kJ m
−1
per 30 min day
−1
T2/T4: UV tube for 15 min in
the morning and at night
T3/T4: 60% UV-B, 30%
UV-A, 4% UV-C and 6%
visible light
R (665 nm): applied for the
whole storage period,
equivalent to PAR of
113 lmol m
−2 per day
(") Lycopene concentration.
Sharply increase with T3 and
T4
(") Concentration of
b-carotene. The highest at T3
after 10 days of postharvest.
T2 had the highest value after
15 days
(") TFC. The highest with T3
after 10 and 15 days of
postharvest
(#) TFC. T2 showed a
significant decrease at day 5
(") TPC. A sharply increase
with T3 at day 10 and peaked
on day 20
(") AC – ABTS. T4 showed
highest Hydrophilic and
Lipophilic AC 20 days after
harvesting compared to control
Stored habanero pepper
(Capsicum chinense)/
Pérez-Ambrocio et al.
(2018)
Combination of B (0, 1.5, and
3 min) and UV-C (0, 0.5, and
1 min)
B: 48 W m
−2
UV-C: 11.3 W m
−2
(") TPC and TFC. All
treatments with B and/or UV-C
showed a significant increase
compared to control. The
highest at 3 min of
B + 0.5 min of UV-C
(") TCC. Increase the first
10 days of storage
(") Capsaicin. Almost all
treatments (1.5 min of B and
1.5 min of B + 1 min UV-C)
presented an increase in
capsaicin
(") AC. Statically higher in all
treatments with B and UV-C
light
Green and purple basil
(Ocimum basilicum)
plants/Dou et al. (2019)
Ten treatments: Combination
of two PPFDs and five UV-B
radiation doses. PPFDs: 160
and 224 lmolÁm
−2
Ás
−1 (high
and low) with a 16-h
photoperiod provided by cool
white fluorescent lamps with
UV of 2.2 and
2.5 lmol m
−2 s
−1
,
respectively
UV-B (16.0 lmol m
−2 s
−1
):
(") TAC. 9–23% higher after
UV-B radiation compared to
control for green basil. Greater
under high PPFD for purple
basil
(") TPC. 28–126% higher after
UV-B compared to control for
green basil. Greater in high
PPFD for purple and green
basil. 29–63% higher under
(continued)
5 Role of Stress and Defense in Plant Secondary Metabolites …
157
the stress factor on plants or food with commercial interest
Food or cultivar/
Reference
Light condition treatment
Result
Stored tomato fruit var.
Cappricia/Panjai et al.
(2017)
(T1) Darkness (control), (T2)
Darkness + UV, (T3) R, (T4)
R + UV. UV of 4.98 kJ m
−1
per 30 min day
−1
T2/T4: UV tube for 15 min in
the morning and at night
T3/T4: 60% UV-B, 30%
UV-A, 4% UV-C and 6%
visible light
R (665 nm): applied for the
whole storage period,
equivalent to PAR of
113 lmol m
−2 per day
(") Lycopene concentration.
Sharply increase with T3 and
T4
(") Concentration of
b-carotene. The highest at T3
after 10 days of postharvest.
T2 had the highest value after
15 days
(") TFC. The highest with T3
after 10 and 15 days of
postharvest
(#) TFC. T2 showed a
significant decrease at day 5
(") TPC. A sharply increase
with T3 at day 10 and peaked
on day 20
(") AC – ABTS. T4 showed
highest Hydrophilic and
Lipophilic AC 20 days after
harvesting compared to control
Stored habanero pepper
(Capsicum chinense)/
Pérez-Ambrocio et al.
(2018)
Combination of B (0, 1.5, and
3 min) and UV-C (0, 0.5, and
1 min)
B: 48 W m
−2
UV-C: 11.3 W m
−2
(") TPC and TFC. All
treatments with B and/or UV-C
showed a significant increase
compared to control. The
highest at 3 min of
B + 0.5 min of UV-C
(") TCC. Increase the first
10 days of storage
(") Capsaicin. Almost all
treatments (1.5 min of B and
1.5 min of B + 1 min UV-C)
presented an increase in
capsaicin
(") AC. Statically higher in all
treatments with B and UV-C
light
Green and purple basil
(Ocimum basilicum)
plants/Dou et al. (2019)
Ten treatments: Combination
of two PPFDs and five UV-B
radiation doses. PPFDs: 160
and 224 lmolÁm
−2
Ás
−1 (high
and low) with a 16-h
photoperiod provided by cool
white fluorescent lamps with
UV of 2.2 and
2.5 lmol m
−2 s
−1
,
respectively
UV-B (16.0 lmol m
−2 s
−1
):
(") TAC. 9–23% higher after
UV-B radiation compared to
control for green basil. Greater
under high PPFD for purple
basil
(") TPC. 28–126% higher after
UV-B compared to control for
green basil. Greater in high
PPFD for purple and green
basil. 29–63% higher under
(continued)
5 Role of Stress and Defense in Plant Secondary Metabolites …
157