Abstract
Lumichrome is a novel multitrophic signal molecule produced by rhizobia and plants that affects many physiological functions including seedling growth, root respiration, photosynthetic rates, leaf stomatal conductance and transpiration in several plant species. The effect of lumichrome on seed germination of four legumes (Rooibos, cowpea, Bambara groundnut and Kersting's bean), and three non-leguminous crops (traditional pumpkin, makataan and spinach), was investigated. All seeds were surface-sterilized and treated for 2 h with either of three levels of lumichrome (0, 5 or 50 nM). Seed germination (two replicates of ten seeds per crop) was done under sterile conditions using 9 cm-plastic petri dishes and Whatman No. 1 filter paper discs moistened with sterile distilled water. Treating legume seeds with nanomolar concentrations of lumichrome enhanced the seed germination percentage and rate of germination of Kersting's bean seeds, but not those of cowpea when compared to the control. Similarly, no significant differences in seed germination were recorded for Rooibos and Bambara groundnut, however, 9 days after treatment with lumichrome, slight stimulation of seed germination was observed for Rooibos and Bambara groundnut soaked in 5 nM lumichrome, compared to their respective controls. In response to nanomolar concentrations of lumichrome, non-leguminous crops also responded differently. A low nanomolar concentration of lumichrome (5 nM) significantly (p<0.05) affected the seed germination of spinach compared to control. The optimum seed germination percentage for makataan (53%) and the least seed germination percentage for traditional pumpkin (2%) were recorded for the 50 nM lumichrome treatment compared to control. In conclusion, nanomolar concentrations of lumichrome enhanced seed germination of both legumes and non-leguminous crops in addition to its known stimulating effect on seedling growth and development in both monocots and dicots.
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Claims 9
Claim · model-written summary
Lumichrome enhanced Kersting’s bean seed germination percentage and rate relative to control.
Verbatim
e0“Treating legume seeds with nanomolar concentrations of lumichrome enhanced the seed germination percentage and rate of germination of Kersting's bean seeds, but not those of cowpea when compared to the control.”
Claim · model-written summary
Lumichrome did not enhance cowpea germination percentage or rate relative to control.
- Taxon
- cowpea
Vigna unguiculatae0 - Treatment
- nanomolar concentrations of lumichromee0
- Outcome
- seed germination percentage and rate of germinatione0
- Comparator
- the controle0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Treating legume seeds with nanomolar concentrations of lumichrome enhanced the seed germination percentage and rate of germination of Kersting's bean seeds, but not those of cowpea when compared to the control.”
Claim · model-written summary
Rooibos germination showed no significant difference after lumichrome treatment.
- Taxon
- Rooibos
PICT2813.JPG?width=60)
Aspalathus linearise0 - Outcome
- seed germinatione0
Not reportedTreatmentComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
PICT2813.JPG?width=500)
Verbatim
e0“no significant differences in seed germination were recorded for Rooibos and Bambara groundnut”
Claim · model-written summary
Bambara groundnut germination showed no significant difference after lumichrome treatment.
- Taxon
- Bambara groundnut
Vigna subterraneae0 - Treatment
- lumichromee0
- Outcome
- seed germinatione0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no significant differences in seed germination were recorded for Rooibos and Bambara groundnut, however, 9 days after treatment with lumichrome”
Claim · model-written summary
At nine days, 5 nM lumichrome slightly stimulated Rooibos germination.
- Taxon
- RooibosAspalathus linearise0
- Treatment
- 5 nM lumichromee0
- Outcome
- seed germinatione0
- Direction
- stimulatione0
- Qualifier
- 9 days after treatmente0
- Comparator
- their respective controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“9 days after treatment with lumichrome, slight stimulation of seed germination was observed for Rooibos and Bambara groundnut soaked in 5 nM lumichrome, compared to their respective controls.”
Claim · model-written summary
At nine days, 5 nM lumichrome slightly stimulated Bambara groundnut germination.
- Taxon
- Bambara groundnutVigna subterraneae0
- Treatment
- 5 nM lumichromee0
- Outcome
- seed germinatione0
- Direction
- stimulatione0
- Qualifier
- 9 days after treatmente0
- Comparator
- their respective controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“9 days after treatment with lumichrome, slight stimulation of seed germination was observed for Rooibos and Bambara groundnut soaked in 5 nM lumichrome, compared to their respective controls.”
Claim · model-written summary
Five nM lumichrome significantly affected spinach seed germination versus control, with direction unspecified.
- Taxon
- spinach
Spinacia oleraceae0 - Treatment
- 5 nMe0
- Outcome
- seed germinatione0
- Comparator
- controle0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A low nanomolar concentration of lumichrome (5 nM) significantly (p<0.05) affected the seed germination of spinach compared to control.”
Claim · model-written summary
At 50 nM lumichrome, makataan had optimum seed germination of 53%.
Verbatim
e0“The optimum seed germination percentage for makataan (53%) and the least seed germination percentage for traditional pumpkin (2%) were recorded for the 50 nM lumichrome treatment compared to control.”
Claim · model-written summary
At 50 nM lumichrome, traditional pumpkin had the lowest germination percentage, 2%.
Verbatim
e0“The optimum seed germination percentage for makataan (53%) and the least seed germination percentage for traditional pumpkin (2%) were recorded for the 50 nM lumichrome treatment compared to control.”
The same questions in other papers
lumichrome · growth · Vigna unguiculata (cowpea)Positive and negative results
1 in the opposite direction
- positive
lumichrome · growth · Vigna subterranea (Bambara groundnut)Positive and negative results
1 in the opposite direction
- no effect
nanoparticle · growth · Vigna unguiculata (cowpea)Positive and negative results
2 papers in the same direction as this paper · 14 in the opposite direction
- positive
- positive
- positive
13 papers more in this group
See all 17 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.