Abstract
Black rice (Oryza sativa L. 'Cempo Ireng') is one of local rice varieties in Sleman Regency, Yogyakarta. The black color is caused by high anthocyanin content which is important source of antioxidant. The cultivation of black rice is still limited due to its tall phenotype, long vegetative stage and low productivitycompared to white rice. Paclobutrazol is a growth retardant causing dwarfing in several crop plants and reducing lodging. Blue light can improve plant quality. This research was aimed to evaluate the effect of blue light and paclobutrazol on seed germination, vegetative growth and yield of black rice. The results showed that the average of seed germination as well as the activity of α-amylase of seeds subjected to blue light were lower compared to those subjected to sunlight; however, paclobutrazol concentrations did not affect seed germination percentage. The height of rice plants treated with paclobutrazol decreased in accordance with the increase of paclobutrazol concentration. Chlorophyll content and tiller numbers increased by paclobutrazol treatment of 12.5 ppm. Nitrate reductase activity was higher in rice seedlings subjected to blue light compared to those subjected to sunlight. Iron (Fe) content of rice plants treated with 25 or 50 ppm paclobutrazol increased compared to control. It was concluded that paclobutrazol application of 12.5 ppm already reduced plant height. The higher concentration of paclobutrazol applied the greater reduction on plant height was observed. Blue light treatment applied during black rice seed germination slightly reduced germination percentage and α-amylase activity in the germinated seeds. However, blue light treatment combined with paclobutrazol application during black rice seed germination increased chlorophyll content, tiller numbers and Fe content in black rice grain.
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Claims 8
Claim · model-written summary
Seed germination and α-amylase activity were lower in black rice seeds under blue light than under sunlight.
- Taxon
- Oryza sativa
Oryza sativat0 - Treatment
- blue lighte0
- Outcome
- seed germination as well as the activity of α-amylasee0
- Direction
- lowere0
- Comparator
- sunlighte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the average of seed germination as well as the activity of α-amylase of seeds subjected to blue light were lower compared to those subjected to sunlight”
t0“Oryza sativa”
Claim · model-written summary
Paclobutrazol concentrations did not affect seed germination percentage of black rice.
- Taxon
- Oryza sativaOryza sativat0
- Treatment
- paclobutrazol concentrationse0
- Outcome
- seed germination percentagee0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“paclobutrazol concentrations did not affect seed germination percentage”
t0“Oryza sativa”
Claim · model-written summary
Height of rice plants treated with paclobutrazol decreased as paclobutrazol concentration increased.
- Taxon
- Oryza sativaOryza sativat0
- Treatment
- paclobutrazole0
- Outcome
- height of rice plantse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The height of rice plants treated with paclobutrazol decreased in accordance with the increase of paclobutrazol concentration”
t0“Oryza sativa”
Claim · model-written summary
Paclobutrazol at 12.5 ppm increased chlorophyll content and tiller numbers of black rice.
- Taxon
- Oryza sativaOryza sativat0
- Treatment
- paclobutrazol treatment of 12.5 ppme0
- Outcome
- Chlorophyll content and tiller numberse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chlorophyll content and tiller numbers increased by paclobutrazol treatment of 12.5 ppm”
t0“Oryza sativa”
Claim · model-written summary
Nitrate reductase activity was higher in rice seedlings under blue light than under sunlight.
- Taxon
- Oryza sativaOryza sativat0
- Treatment
- blue lighte0
- Outcome
- Nitrate reductase activitye0
- Direction
- highere0
- Comparator
- sunlighte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrate reductase activity was higher in rice seedlings subjected to blue light compared to those subjected to sunlight”
t0“Oryza sativa”
Claim · model-written summary
Iron (Fe) content of rice plants treated with 25 or 50 ppm paclobutrazol increased compared with the control.
- Taxon
- Oryza sativaOryza sativat0
- Treatment
- 25 or 50 ppm paclobutrazole0
- Outcome
- Iron (Fe) contente0
- Direction
- increasede0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Iron (Fe) content of rice plants treated with 25 or 50 ppm paclobutrazol increased compared to control”
t0“Oryza sativa”
Claim · model-written summary
Paclobutrazol at 12.5 ppm already reduced plant height of black rice.
- Taxon
- Oryza sativaOryza sativat0
- Treatment
- paclobutrazol application of 12.5 ppme0
- Outcome
- plant heighte0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“paclobutrazol application of 12.5 ppm already reduced plant height”
t0“Oryza sativa”
Claim · model-written summary
Blue light combined with paclobutrazol during seed germination increased chlorophyll content, tiller numbers and Fe content in black rice grain.
- Taxon
- black ricee0
- Organ / stage
- graine0
- Treatment
- blue light treatment combined with paclobutrazol application during black rice seed germinatione0
- Outcome
- chlorophyll content, tiller numbers and Fe contente0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“blue light treatment combined with paclobutrazol application during black rice seed germination increased chlorophyll content, tiller numbers and Fe content in black rice grain”
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See all 29 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.