Abstract
The correlations of the reading of a portable chlorophyll meter (SPAD-502) with the chlorophyll and N contents of leaves of two faba bean (Vicia fabaL.) cultivars, Japanese (Ryousai-issun) and Egyptian (Cairo 241), were examined. The SPAD readings positively correlated (ρ<0.01) with the chlorophyll contents and the r2 values were 0.99 and 1.00 for Ryousai-issun and Cairo 241, respectively. A close linear relationship (ρ0.001) was observed between SPAD reading and total leaf N content at the pod development stage of faba bean plants with r2 = 0.88 and 0.99 for Ryousai-issun and Cairo 241, respectively. The SPAD reading was the highest in the 2nd to 4th leaves counted from the top (the youngest fully expanded leaves). The changes in leaf chlorophyll content of both cultivars from 3 weeks after transplanting to the ripening stage showed an incomplete “M” type curve. SPAD readings were significant¬ly higher in Ryousai-issun than in Cairo 241 throughout the growth season. Organic fertilizers application improved faba bean plant growth. These results suggest that the SPAD-502 chlorophyll meter can be used to measure chlorophyll and nitrogen contents of faba bean leaves for quick screening faba bean genotypes.
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Claims 7
Claim · model-written summary
SPAD readings were positively correlated with chlorophyll contents in both faba bean cultivars (r2 0.99 and 1.00).
- Taxon
- faba bean
Vicia fabae0 - Material
- Ryousai-issun and Cairo 241e1
- Outcome
- chlorophyll contentse1
- Direction
- positively correlatede1
- Value
- 0.99 and 1.00e1
- Qualifier
- ρ<0.01e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“SPAD readings positively correlated (ρ<0.01) with the chlorophyll contents and the r2 values were 0.99 and 1.00 for Ryousai-issun and Cairo 241, respectively”
e0“leaves of two faba bean (Vicia fabaL.) cultivars”
Claim · model-written summary
SPAD reading had a close linear relationship with total leaf N content at the pod development stage in both faba bean cultivars (r2 0.88 and 0.99).
- Taxon
- faba beanVicia fabae2
- Material
- Ryousai-issun and Cairo 241e2
- Organ / stage
- pod development stagee2
- Outcome
- total leaf N contente2
- Value
- 0.88 and 0.99e2
- Qualifier
- ρ0.001e2
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“A close linear relationship (ρ0.001) was observed between SPAD reading and total leaf N content at the pod development stage of faba bean plants with r2 = 0.88 and 0.99 for Ryousai-issun and Cairo 241, respectively”
e0“leaves of two faba bean (Vicia fabaL.) cultivars”
Claim · model-written summary
SPAD reading was highest in the 2nd to 4th leaves counted from the top of faba bean plants.
- Taxon
- faba beanVicia fabae0
- Organ / stage
- 2nd to 4th leaves counted from the tope3
- Outcome
- SPAD readinge3
- Direction
- higheste3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“The SPAD reading was the highest in the 2nd to 4th leaves counted from the top”
e0“leaves of two faba bean (Vicia fabaL.) cultivars”
Claim · model-written summary
Leaf chlorophyll content of both faba bean cultivars showed an incomplete M-type curve from 3 weeks after transplanting to the ripening stage.
- Taxon
- faba beanVicia fabae0
- Organ / stage
- ripening stagee4
- Outcome
- leaf chlorophyll contente4
- Qualifier
- incomplete “M” type curvee4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“The changes in leaf chlorophyll content of both cultivars from 3 weeks after transplanting to the ripening stage showed an incomplete “M” type curve”
e0“leaves of two faba bean (Vicia fabaL.) cultivars”
Claim · model-written summary
SPAD readings were higher in Ryousai-issun than in Cairo 241 throughout the growth season.
- Taxon
- faba beanVicia fabae0
- Material
- Ryousai-issune5
- Outcome
- SPAD readingse5
- Direction
- highere5
- Qualifier
- throughout the growth seasone5
- Comparator
- Cairo 241e5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“SPAD readings were significant¬ly higher in Ryousai-issun than in Cairo 241 throughout the growth season”
e0“leaves of two faba bean (Vicia fabaL.) cultivars”
Claim · model-written summary
Organic fertilizer application improved faba bean plant growth.
- Taxon
- faba beanVicia fabae6
- Treatment
- Organic fertilizers applicatione6
- Outcome
- plant growthe6
- Direction
- improvede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Organic fertilizers application improved faba bean plant growth”
Claim · model-written summary
The authors suggest that the SPAD-502 meter can measure chlorophyll and nitrogen contents of faba bean leaves for quick screening of genotypes.
- Taxon
- faba beanVicia fabae7
- Outcome
- measure chlorophyll and nitrogen contents of faba bean leavese7
- Qualifier
- for quick screening faba bean genotypese7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“These results suggest that the SPAD-502 chlorophyll meter can be used to measure chlorophyll and nitrogen contents of faba bean leaves for quick screening faba bean genotypes”
The same questions in other papers
fertilization · growth · Vicia faba (faba bean)Positive and negative results
66 papers in the same direction as this paper · 6 in the opposite direction
- positive
- negative
- no effect
69 papers more in this group
See all 73 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.