Abstract
Green bean (Phaseolus vulgaris L.) is one of the most important sources of vegetable proteins in the world and it is cultivated all year round, but the light availability, during the dark season, limited its growth. Nevertheless, recent studies conducted on greenhouse horticulture demonstrated that, with the application of light emitting diodes (LEDs) as supplementary light (SL) technology, it is possible to overcome this limitation. Consequently, during the experiment conducted, two cultivars of green bean (‘Saporro’ and ‘Maestrale’) were grown with a soilless system in a cold greenhouse during the fall-winter period. To increase the photoperiod and the daily light integral (DLI), early in the morning, four hours of red (R), blue (B) and red+blue (R + B) supplementary light were supplied by LEDs at 180 μmol·m−2·s−1 (PPFD) at plants level. Plants grown under LEDs improved the yield and the gas exchange system compared with the plants grown under natural light; when B light was supplied as a sole source of SL, it increased the dry matter content and the brightness (L*) of the pods. Between the cultivars, ‘Maestrale’ produced 20 g∙plant−1 of pods more than ‘Saporro’ but the latter’s colour was brighter (L*) and greener (a*), and ‘Saporro’ also showed the highest photosynthetic efficiency (ΦPSII). In conclusion, ‘Maestrale’ and ‘Saporro’ obtained encouraging out-of-season yields under different LED spectra, but among those B light seems to improve overall crop performances and pods quality.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 9
Claim · model-written summary
LED lighting improved green bean yield relative to natural light.
Verbatim
e0“Plants grown under LEDs improved the yield and the gas exchange system compared with the plants grown under natural light”
t0“Green Beans”
Claim · model-written summary
LED lighting improved green bean gas exchange relative to natural light.
Verbatim
e0“Plants grown under LEDs improved the yield and the gas exchange system compared with the plants grown under natural light”
t0“Green Beans”
Claim · model-written summary
Blue supplemental light increased pod dry matter content.
- Taxon
- Green Beanst0
- Organ / stage
- podse0
- Treatment
- B lighte0
- Outcome
- dry matter contente0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“when B light was supplied as a sole source of SL, it increased the dry matter content and the brightness (L*) of the pods”
t0“Green Beans”
Claim · model-written summary
Blue supplemental light increased pod brightness.
Not reportedComparator
Verbatim
e0“when B light was supplied as a sole source of SL, it increased the dry matter content and the brightness (L*) of the pods”
t0“Green Beans”
Claim · model-written summary
Maestrale produced 20 g per plant more pods than Saporro.
Verbatim
e0“‘Maestrale’ produced 20 g∙plant−1 of pods more than ‘Saporro’”
t0“Green Beans”
Claim · model-written summary
Saporro pods were brighter than Maestrale pods.
Verbatim
e0“the latter’s colour was brighter (L*) and greener (a*)”
e1“‘Maestrale’ produced 20 g∙plant−1 of pods more than ‘Saporro’”
t0“Green Beans”
Claim · model-written summary
Saporro pods were greener than Maestrale pods.
Verbatim
e0“the latter’s colour was brighter (L*) and greener (a*)”
e1“‘Maestrale’ produced 20 g∙plant−1 of pods more than ‘Saporro’”
t0“Green Beans”
Claim · model-written summary
Saporro had the highest photosynthetic efficiency.
Verbatim
e0“‘Saporro’ also showed the highest photosynthetic efficiency (ΦPSII)”
t0“Green Beans”
Claim · model-written summary
The authors concluded that blue supplemental light seems to improve overall crop performance and pod quality.
Verbatim
e0“among those B light seems to improve overall crop performances and pods quality”
t0“Green Beans”
The same questions in other papers
light · physiology: gas exchange · Phaseolus vulgaris (common bean)Positive and negative results
1 reporting no difference from an alternative
- no effect
light · yield · Phaseolus vulgaris (common bean)Positive and negative results
5 papers in the same direction as this paper · 5 in the opposite direction
- negative
- negative
- negative
7 papers more in this group
See all 11 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.