Abstract
Effect of red and blue light on seed germination and seedling growth were studied in rice (Oryza sativa L.). Rice seeds were germinated in dark (control) and two types of light emitting-diodes (LED): red and green in the laboratory. The photoperiod of 6 h light and 18 h dark for LEDs treatment and 24h dark treatments with 24/18 ± 2 °C day/night temperature and 78± 2 % relative humidity were maintained in the growth room. Seed germination percentage under red light increased significantly when compared with the control; however, in blue light, germination percent decreased with little difference. First leaf length, first leaf blade length, root length, seedling fresh and dry weight increased under red and blue lights in most of the varieties. Highest germination (98%), longest root (8.18 cm) and high seedling fresh weight (0.527 g) and seedling dry weight (0.061g) in BRRIdhan71 and longest leaf in BRRIdhan75, were recorded under red light. Highest germination (96%), seedling fresh weight (0.414g) and seedling dry weight (0.047g) in BRRIdhan71, longest first leaf (6.50 cm) in BRRIdhan75 and longest root (9.37 cm) in BRRIdhan87 were recorded under blue light. First leaf blade showed only positive correlation with root length (r = 0.489), whereas seedling fresh weight showed complete correlation with seedling dry weight (r =1). Response index was positive in root length, seedling fresh and dry weight under red light. First leaf blade length, seedling fresh and dry weight had the positive response index under blue light. Within the visible spectrum, varying wave lengths of red and blue light alone altered the growth and morphology of rice seedlings, and variable reactions to illumination depended on the rice varieties, necessitating further research. Environ. Sci. & Natural Resources, 13(1&2): 56-62, 2020
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Claims 20
Claim · model-written summary
Red light increased rice seed germination significantly compared with the control.
- Taxon
- rice
Oryza sativae0 - Treatment
- red lighte1
- Outcome
- Seed germination percentagee1
- Direction
- increasede1
- Comparator
- the controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“were studied in rice (Oryza sativa L.)”
e1“Seed germination percentage under red light increased significantly when compared with the control”
Claim · model-written summary
Blue light decreased rice germination percentage with little difference.
- Taxon
- riceOryza sativae0
- Treatment
- blue lighte2
- Outcome
- germination percente2
- Direction
- decreasede2
- Qualifier
- little differencee2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“were studied in rice (Oryza sativa L.)”
e2“however, in blue light, germination percent decreased with little difference”
Claim · model-written summary
Red and blue light increased first leaf length, first leaf blade length and root length in most varieties.
- Taxon
- riceOryza sativae0
- Treatment
- red and blue lightse3
- Outcome
- First leaf length, first leaf blade length, root lengthe3
- Direction
- increasede3
- Qualifier
- in most of the varietiese3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“were studied in rice (Oryza sativa L.)”
e3“First leaf length, first leaf blade length, root length, seedling fresh and dry weight increased under red and blue lights in most of the varieties”
Claim · model-written summary
Red and blue light increased seedling fresh and dry weight in most varieties.
- Taxon
- riceOryza sativae0
- Treatment
- red and blue lightse3
- Outcome
- seedling fresh and dry weighte3
- Direction
- increasede3
- Qualifier
- in most of the varietiese3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“were studied in rice (Oryza sativa L.)”
e3“First leaf length, first leaf blade length, root length, seedling fresh and dry weight increased under red and blue lights in most of the varieties”
Claim · model-written summary
Under red light, BRRIdhan71 had the highest germination, 98%.
- Taxon
- riceOryza sativae0
- Material
- BRRIdhan71e4
- Treatment
- red lighte4
- Outcome
- Highest germinatione4
- Value
- 98%e4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“were studied in rice (Oryza sativa L.)”
e4“Highest germination (98%), longest root (8.18 cm) and high seedling fresh weight (0.527 g) and seedling dry weight (0.061g) in BRRIdhan71 and longest leaf in BRRIdhan75, were recorded under red light”
Claim · model-written summary
Under red light, BRRIdhan71 had the longest root, 8.18 cm.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“were studied in rice (Oryza sativa L.)”
e4“Highest germination (98%), longest root (8.18 cm) and high seedling fresh weight (0.527 g) and seedling dry weight (0.061g) in BRRIdhan71 and longest leaf in BRRIdhan75, were recorded under red light”
Claim · model-written summary
Under red light, BRRIdhan71 had high seedling fresh weight, 0.527 g.
- Taxon
- riceOryza sativae0
- Material
- BRRIdhan71e4
- Treatment
- red lighte4
- Outcome
- seedling fresh weighte4
- Direction
- highe4
- Value
- 0.527 ge4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“were studied in rice (Oryza sativa L.)”
e4“Highest germination (98%), longest root (8.18 cm) and high seedling fresh weight (0.527 g) and seedling dry weight (0.061g) in BRRIdhan71 and longest leaf in BRRIdhan75, were recorded under red light”
Claim · model-written summary
Under red light, BRRIdhan71 had seedling dry weight of 0.061 g.
- Taxon
- riceOryza sativae0
- Material
- BRRIdhan71e4
- Treatment
- red lighte4
- Outcome
- seedling dry weighte4
- Value
- 0.061ge4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“were studied in rice (Oryza sativa L.)”
e4“Highest germination (98%), longest root (8.18 cm) and high seedling fresh weight (0.527 g) and seedling dry weight (0.061g) in BRRIdhan71 and longest leaf in BRRIdhan75, were recorded under red light”
Claim · model-written summary
Under red light, BRRIdhan75 had the longest leaf.
- Taxon
- riceOryza sativae0
- Material
- BRRIdhan75e4
- Treatment
- red lighte4
- Outcome
- longest leafe4
- Direction
- longeste4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“were studied in rice (Oryza sativa L.)”
e4“Highest germination (98%), longest root (8.18 cm) and high seedling fresh weight (0.527 g) and seedling dry weight (0.061g) in BRRIdhan71 and longest leaf in BRRIdhan75, were recorded under red light”
Claim · model-written summary
Under blue light, BRRIdhan71 had the highest germination, 96%.
- Taxon
- riceOryza sativae0
- Material
- BRRIdhan71e5
- Treatment
- blue lighte5
- Outcome
- Highest germinatione5
- Value
- 96%e5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“were studied in rice (Oryza sativa L.)”
e5“Highest germination (96%), seedling fresh weight (0.414g) and seedling dry weight (0.047g) in BRRIdhan71, longest first leaf (6.50 cm) in BRRIdhan75 and longest root (9.37 cm) in BRRIdhan87 were recorded under blue light”
Claim · model-written summary
Under blue light, BRRIdhan71 had seedling fresh weight of 0.414 g.
- Taxon
- riceOryza sativae0
- Material
- BRRIdhan71e5
- Treatment
- blue lighte5
- Outcome
- seedling fresh weighte5
- Value
- 0.414ge5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“were studied in rice (Oryza sativa L.)”
e5“Highest germination (96%), seedling fresh weight (0.414g) and seedling dry weight (0.047g) in BRRIdhan71, longest first leaf (6.50 cm) in BRRIdhan75 and longest root (9.37 cm) in BRRIdhan87 were recorded under blue light”
Claim · model-written summary
Under blue light, BRRIdhan71 had seedling dry weight of 0.047 g.
- Taxon
- riceOryza sativae0
- Material
- BRRIdhan71e5
- Treatment
- blue lighte5
- Outcome
- seedling dry weighte5
- Value
- 0.047ge5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“were studied in rice (Oryza sativa L.)”
e5“Highest germination (96%), seedling fresh weight (0.414g) and seedling dry weight (0.047g) in BRRIdhan71, longest first leaf (6.50 cm) in BRRIdhan75 and longest root (9.37 cm) in BRRIdhan87 were recorded under blue light”
Claim · model-written summary
Under blue light, BRRIdhan75 had the longest first leaf, 6.50 cm.
- Taxon
- riceOryza sativae0
- Material
- BRRIdhan75e5
- Treatment
- blue lighte5
- Outcome
- longest first leafe5
- Value
- 6.50 cme5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“were studied in rice (Oryza sativa L.)”
e5“Highest germination (96%), seedling fresh weight (0.414g) and seedling dry weight (0.047g) in BRRIdhan71, longest first leaf (6.50 cm) in BRRIdhan75 and longest root (9.37 cm) in BRRIdhan87 were recorded under blue light”
Claim · model-written summary
Under blue light, BRRIdhan87 had the longest root, 9.37 cm.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“were studied in rice (Oryza sativa L.)”
e5“Highest germination (96%), seedling fresh weight (0.414g) and seedling dry weight (0.047g) in BRRIdhan71, longest first leaf (6.50 cm) in BRRIdhan75 and longest root (9.37 cm) in BRRIdhan87 were recorded under blue light”
Claim · model-written summary
First leaf blade length is positively correlated with root length (r = 0.489).
- Taxon
- riceOryza sativae0
- Organ / stage
- roote6
- Outcome
- first leaf bladee6
- Direction
- positivee6
- Value
- r = 0.489e6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“were studied in rice (Oryza sativa L.)”
e6“First leaf blade showed only positive correlation with root length (r = 0.489), whereas seedling fresh weight showed complete correlation with seedling dry weight (r =1)”
Claim · model-written summary
Seedling fresh weight is completely correlated with seedling dry weight (r = 1).
- Taxon
- riceOryza sativae0
- Organ / stage
- seedlinge6
- Outcome
- seedling fresh weighte6
- Direction
- completee6
- Value
- r =1e6
- Comparator
- seedling dry weighte6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“were studied in rice (Oryza sativa L.)”
e6“First leaf blade showed only positive correlation with root length (r = 0.489), whereas seedling fresh weight showed complete correlation with seedling dry weight (r =1)”
Claim · model-written summary
Under red light, the response index was positive for root length, seedling fresh weight and dry weight.
- Taxon
- riceOryza sativae0
- Treatment
- red lighte7
- Outcome
- Response indexe7
- Direction
- positivee7
- Qualifier
- root length, seedling fresh and dry weighte7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“were studied in rice (Oryza sativa L.)”
e7“Response index was positive in root length, seedling fresh and dry weight under red light”
Claim · model-written summary
Under blue light, the response index was positive for first leaf blade length, seedling fresh weight and dry weight.
- Taxon
- riceOryza sativae0
- Treatment
- blue lighte1
- Outcome
- response indexe1
- Direction
- positivee1
- Qualifier
- First leaf blade length, seedling fresh and dry weighte1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“were studied in rice (Oryza sativa L.)”
e1“First leaf blade length, seedling fresh and dry weight had the positive response index under blue light”
Claim · model-written summary
Varying wavelengths of red and blue light alone altered the growth and morphology of rice seedlings.
- Taxon
- riceOryza sativae0
- Treatment
- red and blue lighte1
- Outcome
- growth and morphologye1
- Direction
- alterede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“were studied in rice (Oryza sativa L.)”
e1“varying wave lengths of red and blue light alone altered the growth and morphology of rice seedlings”
Claim · model-written summary
Variable reactions to illumination depended on the rice variety.
- Taxon
- riceOryza sativae0
- Material
- rice varietiese1
- Outcome
- reactions to illuminatione1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“were studied in rice (Oryza sativa L.)”
e1“variable reactions to illumination depended on the rice varieties”
The same questions in other papers
light · growth · Oryza sativa (rice)Positive and negative results
54 papers in the same direction as this paper · 38 in the opposite direction · 2 reporting no difference from an alternative
- negative
- positive
- positive
91 papers more in this group
See all 95 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.