Paper · 1989 · Journal of Agronomy and Crop Science

The Pattern of Dry‐Matter Distribution during Development in Onion

D. N. Iortsuun; A. A. Khan

11
claims
23
verbatim quotes
3
citations
2
research areas
—
Not open access

Abstract

Abstract Plant height, number of leaves, diameter and fresh weight of the bulbs, and the dry weights of the component plant parts of 3 onion cvs were measured weekly, starting 40 days after transplanting, up to maturity. Red Kano had singificantly more leaves, greater leaf area, larger bulbs and fresh and dry weights than Eclipsel Bermuda and Texas Grano. Net Assimilation Rate (NAR), Relative Growth Rate (RGR), and Relative Leaf Growth Rate (RLGR) were generally high in the early stages of growth in all cvs and declined with plant age. Red Kano had much higher values than the other two. Crop Growth Rate (CGR) of tops was positive in the early stages of plant growth in all the cvs but decreased to negative values towards maturity which was due to a decrease in the dry weight of the leaf blades caused by decrease in leaf number. Red Kano and Texas Grano showed positive values throughout the experimental period. The higher CGR for the bulbs as compared to the blades was due to large quantities of carbohydrates which were translocated to the bulbs. Leaf Area Ratio (LAR) was constant in Red Kano , due to proportionate increase in leaf blade area and weight. Results of all the growth characteristics showed that Red Kano was superior to the other cvs in attaining a larger bulb size due to large number of leaves and longer growing season, resulting in the translocation of more carbohydrates to the bulbs.

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Claims 11

Observationobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Red Kano had more leaves, greater leaf area and larger bulbs than the other cultivars.

Taxon
OnionAllium cepat0
Material
Red Kanoe0
Outcome
more leaves, greater leaf area, larger bulbse0
Direction
moree0
Comparator
Eclipsel Bermuda and Texas Granoe0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Allium cepa
Allium cepa · TaxonMehdi · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Red Kano had singificantly more leaves, greater leaf area, larger bulbs and fresh and dry weights than Eclipsel Bermuda and Texas Grano.”

✓ located verbatim in the source · abstract, characters 221–357 · show in text ↑
t0

“Onion”

✓ located verbatim in the source · title, characters 61–66 · show in text ↑
Observationobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Red Kano had greater fresh and dry weights than the other cultivars.

Taxon
OnionAllium cepat0
Material
Red Kanoe0
Outcome
fresh and dry weightse0
Direction
greatere0
Comparator
Eclipsel Bermuda and Texas Granoe0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Allium cepa
Allium cepa · TaxonMehdi · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Red Kano had singificantly more leaves, greater leaf area, larger bulbs and fresh and dry weights than Eclipsel Bermuda and Texas Grano.”

✓ located verbatim in the source · abstract, characters 221–357 · show in text ↑
t0

“Onion”

✓ located verbatim in the source · title, characters 61–66 · show in text ↑
Associationobservedoriginal resultmeasured

Claim · model-written summary

NAR, RGR and RLGR declined with age after generally high early values.

Taxon
OnionAllium cepat0
Organ / stage
early stages of growthe0
Outcome
Net Assimilation Rate (NAR), Relative Growth Rate (RGR), and Relative Leaf Growth Rate (RLGR)e0
Direction
declinede0
Qualifier
plant agee0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Allium cepa
Allium cepa · TaxonMehdi · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Net Assimilation Rate (NAR), Relative Growth Rate (RGR), and Relative Leaf Growth Rate (RLGR) were generally high in the early stages of growth in all cvs and declined with plant age.”

✓ located verbatim in the source · abstract, characters 358–541 · show in text ↑
t0

“Onion”

✓ located verbatim in the source · title, characters 61–66 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

Red Kano had higher NAR, RGR and RLGR than the other two cultivars.

Taxon
OnionAllium cepat0
Material
Red Kanoe0
Outcome
Net Assimilation Rate (NAR), Relative Growth Rate (RGR), and Relative Leaf Growth Rate (RLGR)e1
Direction
highere0
Comparator
the other twoe0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Allium cepa
Allium cepa · TaxonMehdi · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Red Kano had much higher values than the other two.”

✓ located verbatim in the source · abstract, characters 542–593 · show in text ↑
e1

“Net Assimilation Rate (NAR), Relative Growth Rate (RGR), and Relative Leaf Growth Rate (RLGR) were generally high in the early stages of growth in all cvs and declined with plant age.”

✓ located verbatim in the source · abstract, characters 358–541 · show in text ↑
t0

“Onion”

✓ located verbatim in the source · title, characters 61–66 · show in text ↑
Associationobservedoriginal resultmeasured

Claim · model-written summary

Top crop growth rate decreased from positive early values to negative values near maturity.

Taxon
OnionAllium cepat0
Organ / stage
maturitye0
Outcome
Crop Growth Rate (CGR) of topse0
Direction
decreasede0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Allium cepa
Allium cepa · TaxonMehdi · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Crop Growth Rate (CGR) of tops was positive in the early stages of plant growth in all the cvs but decreased to negative values towards maturity”

✓ located verbatim in the source · abstract, characters 594–738 · show in text ↑
t0

“Onion”

✓ located verbatim in the source · title, characters 61–66 · show in text ↑
Mechanismauthor interpretationoriginal resultmeasured

Claim · model-written summary

The decline in top growth rate was attributed to fewer leaves reducing blade dry weight.

Taxon
OnionAllium cepat0
Outcome
decrease in the dry weight of the leaf bladese0
Qualifier
decrease in leaf numbere0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Allium cepa
Allium cepa · TaxonMehdi · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“which was due to a decrease in the dry weight of the leaf blades caused by decrease in leaf number.”

✓ located verbatim in the source · abstract, characters 739–838 · show in text ↑
t0

“Onion”

✓ located verbatim in the source · title, characters 61–66 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Red Kano maintained positive growth-rate values throughout the experiment.

Taxon
OnionAllium cepat0
Material
Red Kanoe0
Outcome
positive values throughout the experimental periode0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Allium cepa
Allium cepa · TaxonMehdi · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Red Kano and Texas Grano showed positive values throughout the experimental period.”

✓ located verbatim in the source · abstract, characters 839–922 · show in text ↑
t0

“Onion”

✓ located verbatim in the source · title, characters 61–66 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Texas Grano maintained positive growth-rate values throughout the experiment.

Taxon
OnionAllium cepat0
Material
Texas Granoe0
Outcome
positive values throughout the experimental periode0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Allium cepa
Allium cepa · TaxonMehdi · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Red Kano and Texas Grano showed positive values throughout the experimental period.”

✓ located verbatim in the source · abstract, characters 839–922 · show in text ↑
t0

“Onion”

✓ located verbatim in the source · title, characters 61–66 · show in text ↑
Mechanismauthor interpretationoriginal resultmeasured

Claim · model-written summary

Higher bulb than blade growth rate was attributed to carbohydrate translocation to bulbs.

Taxon
OnionAllium cepat0
Compound
carbohydratese0
Outcome
CGR for the bulbse0
Direction
highere0
Qualifier
translocated to the bulbse0
Comparator
bladese0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Allium cepa
Allium cepa · TaxonMehdi · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“The higher CGR for the bulbs as compared to the blades was due to large quantities of carbohydrates which were translocated to the bulbs.”

✓ located verbatim in the source · abstract, characters 923–1060 · show in text ↑
t0

“Onion”

✓ located verbatim in the source · title, characters 61–66 · show in text ↑
Mechanismauthor interpretationoriginal resultno effectmeasured

Claim · model-written summary

Red Kano leaf area ratio remained constant because blade area and weight increased proportionately.

Taxon
OnionAllium cepat0
Material
Red Kanoe0
Outcome
Leaf Area Ratio (LAR)e0
Direction
constante0
Qualifier
proportionate increase in leaf blade area and weighte0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Allium cepa
Allium cepa · TaxonMehdi · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Leaf Area Ratio (LAR) was constant in Red Kano , due to proportionate increase in leaf blade area and weight.”

✓ located verbatim in the source · abstract, characters 1061–1170 · show in text ↑
t0

“Onion”

✓ located verbatim in the source · title, characters 61–66 · show in text ↑
Mechanismauthor interpretationoriginal resultpositivemeasured

Claim · model-written summary

Red Kano's larger bulb size was attributed to more leaves and a longer season enabling more carbohydrate translocation.

Taxon
OnionAllium cepat0
Material
Red Kanoe0
Compound
carbohydratese0
Outcome
larger bulb sizee0
Qualifier
large number of leaves and longer growing seasone0
Comparator
other cvse0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Allium cepa
Allium cepa · TaxonMehdi · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“Results of all the growth characteristics showed that Red Kano was superior to the other cvs in attaining a larger bulb size due to large number of leaves and longer growing season, resulting in the translocation of more carbohydrates to the bulbs.”

✓ located verbatim in the source · abstract, characters 1171–1419 · show in text ↑
t0

“Onion”

✓ located verbatim in the source · title, characters 61–66 · show in text ↑