Paper · 1976 · American Journal of Botany

THE ROLE OF THE ENDOSPERM IN THE GERMINATION OF LEGUMES: GALACTOMANNAN, NITROGEN, AND PHOSPHORUS CHANGES IN THE GERMINATION OF GUAR (CYAMOPSIS TETRAGONOLOBA; LEGUMINOSAE)

John H. McClendon; William G. Nolan; Herman F. Wenzler

15
claims
29
verbatim quotes
41
citations
2
research areas
—
Not open access

Abstract

The endosperm of Cyamopsis tetragonoloba (“guar”) contains 41 % of the dry weight and 45 % of the acetone‐insoluble‐solids of the seed, but only 3–11 % of the nitrogen and phosphorus. At least 75 % of the acetone‐insoluble‐solids of the endosperm is galactomannan, only about 12% being accounted for as pentosan, pectin, protein, phytin, ash, and dilute‐acid‐insoluble residue. During a five‐day germination period at 30 C, all of the galactomannan and all but 5 % of the dry weight of the endosperm disappeared, being translocated to the cotyledons. About ⅓ of the nitrogen and phosphorus of the endosperm plus seed coat were also translocated. After a 36‐hr lag, the accumulation of the nitrogen and acetone‐insoluble‐solids in the seedling axis were linear, while the total dry weight and phosphorus showed a rapid increase followed by a slower accumulation during the five‐day period. In the cotyledons, the dry weight temporarily increased, but the acetone‐insoluble‐solids, nitrogen and phosphorus showed only a net decrease after 84, 36 and 36 hr, respectively. Scanning election micrographs of dry‐fractured and sectioned endosperm show that the bulk of the endosperm is a solid mass of galactomannan with essentially no cell lumina; a several‐cell layer (“aleurone”) of thick‐walled cells of similar structure is metabolically active.

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Claims 15

Observationobservedoriginal resultmeasured

Claim · model-written summary

Guar endosperm contained 41% of seed dry weight.

Taxon
Cyamopsis tetragonolobaCyamopsis tetragonolobae0
Organ / stage
endosperme0
Outcome
dry weighte0
Value
41 %e0

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

Cyamopsis tetragonoloba
Cyamopsis tetragonoloba · Taxon · picture from its Wikimedia Commons categoryTon Rulkens · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

e0

“The endosperm of Cyamopsis tetragonoloba (“guar”) contains 41 % of the dry weight”

✓ located verbatim in the source · abstract, characters 0–81 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Guar endosperm contained 45% of seed acetone insoluble solids.

Taxon
Cyamopsis tetragonolobaCyamopsis tetragonolobae0
Organ / stage
endosperme0
Outcome
acetone‐insoluble‐solidse0
Value
45 %e0

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

Cyamopsis tetragonoloba
Cyamopsis tetragonoloba · Taxon · picture from its Wikimedia Commons categoryTon Rulkens · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

e0

“The endosperm of Cyamopsis tetragonoloba (“guar”) contains 41 % of the dry weight and 45 % of the acetone‐insoluble‐solids of the seed”

✓ located verbatim in the source · abstract, characters 0–134 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Guar endosperm contained only 3–11% of seed nitrogen and phosphorus.

Taxon
Cyamopsis tetragonolobaCyamopsis tetragonolobae0
Organ / stage
endosperme0
Outcome
nitrogen and phosphoruse0
Value
3–11 %e0

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

Cyamopsis tetragonoloba
Cyamopsis tetragonoloba · Taxon · picture from its Wikimedia Commons categoryTon Rulkens · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

e0

“The endosperm of Cyamopsis tetragonoloba (“guar”) contains 41 % of the dry weight and 45 % of the acetone‐insoluble‐solids of the seed, but only 3–11 % of the nitrogen and phosphorus”

✓ located verbatim in the source · abstract, characters 0–182 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

At least 75% of endosperm acetone insoluble solids was galactomannan.

Taxon
Cyamopsis tetragonolobaCyamopsis tetragonolobat0
Organ / stage
endosperme0
Outcome
galactomannane0
Value
At least 75 %e0

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

Cyamopsis tetragonoloba
Cyamopsis tetragonoloba · Taxon · picture from its Wikimedia Commons categoryTon Rulkens · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

e0

“At least 75 % of the acetone‐insoluble‐solids of the endosperm is galactomannan”

✓ located verbatim in the source · abstract, characters 184–263 · show in text ↑
t0

“Cyamopsis tetragonoloba”

✓ located after whitespace/quote normalisation · title, characters 133–156 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

About 12% of endosperm acetone insoluble solids was other listed constituents.

Taxon
Cyamopsis tetragonolobaCyamopsis tetragonolobat0
Outcome
pentosan, pectin, protein, phytin, ash, and dilute‐acid‐insoluble residuee0
Value
about 12%e0

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

Cyamopsis tetragonoloba
Cyamopsis tetragonoloba · Taxon · picture from its Wikimedia Commons categoryTon Rulkens · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

e0

“only about 12% being accounted for as pentosan, pectin, protein, phytin, ash, and dilute‐acid‐insoluble residue”

✓ located verbatim in the source · abstract, characters 265–376 · show in text ↑
t0

“Cyamopsis tetragonoloba”

✓ located after whitespace/quote normalisation · title, characters 133–156 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

All endosperm galactomannan disappeared during five days of germination.

Taxon
Cyamopsis tetragonolobaCyamopsis tetragonolobat0
Organ / stage
endosperme0
Outcome
galactomannane0
Direction
disappearede0
Qualifier
five‐day germination period at 30 Ce0

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

Cyamopsis tetragonoloba
Cyamopsis tetragonoloba · Taxon · picture from its Wikimedia Commons categoryTon Rulkens · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

e0

“During a five‐day germination period at 30 C, all of the galactomannan and all but 5 % of the dry weight of the endosperm disappeared”

✓ located verbatim in the source · abstract, characters 378–511 · show in text ↑
t0

“Cyamopsis tetragonoloba”

✓ located after whitespace/quote normalisation · title, characters 133–156 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

All but 5% of endosperm dry weight disappeared during germination.

Taxon
Cyamopsis tetragonolobaCyamopsis tetragonolobat0
Organ / stage
endosperme0
Outcome
dry weighte0
Direction
disappearede0
Value
5 %e0

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

Cyamopsis tetragonoloba
Cyamopsis tetragonoloba · Taxon · picture from its Wikimedia Commons categoryTon Rulkens · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

e0

“During a five‐day germination period at 30 C, all of the galactomannan and all but 5 % of the dry weight of the endosperm disappeared”

✓ located verbatim in the source · abstract, characters 378–511 · show in text ↑
t0

“Cyamopsis tetragonoloba”

✓ located after whitespace/quote normalisation · title, characters 133–156 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

About one third of nitrogen and phosphorus from endosperm and seed coat translocated.

Taxon
Cyamopsis tetragonolobaCyamopsis tetragonolobat0
Organ / stage
endosperm plus seed coate0
Outcome
nitrogen and phosphoruse0
Direction
translocatede0
Value
About ⅓e0

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

Cyamopsis tetragonoloba
Cyamopsis tetragonoloba · Taxon · picture from its Wikimedia Commons categoryTon Rulkens · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

e0

“About ⅓ of the nitrogen and phosphorus of the endosperm plus seed coat were also translocated”

✓ located verbatim in the source · abstract, characters 551–644 · show in text ↑
t0

“Cyamopsis tetragonoloba”

✓ located after whitespace/quote normalisation · title, characters 133–156 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Nitrogen and acetone insoluble solids accumulated linearly in the seedling axis after a 36-hour lag.

Taxon
Cyamopsis tetragonolobaCyamopsis tetragonolobat0
Organ / stage
seedling axise0
Outcome
accumulation of the nitrogen and acetone‐insoluble‐solidse0
Direction
accumulatione0
Qualifier
36‐hr lage0

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

Cyamopsis tetragonoloba
Cyamopsis tetragonoloba · Taxon · picture from its Wikimedia Commons categoryTon Rulkens · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

e0

“After a 36‐hr lag, the accumulation of the nitrogen and acetone‐insoluble‐solids in the seedling axis were linear”

✓ located verbatim in the source · abstract, characters 646–759 · show in text ↑
t0

“Cyamopsis tetragonoloba”

✓ located after whitespace/quote normalisation · title, characters 133–156 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Axis dry weight and phosphorus increased rapidly, then accumulated more slowly.

Taxon
Cyamopsis tetragonolobaCyamopsis tetragonolobat0
Outcome
total dry weight and phosphoruse0
Direction
rapid increase followed by a slower accumulatione0

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

Cyamopsis tetragonoloba
Cyamopsis tetragonoloba · Taxon · picture from its Wikimedia Commons categoryTon Rulkens · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

e0

“the total dry weight and phosphorus showed a rapid increase followed by a slower accumulation during the five‐day period”

✓ located verbatim in the source · abstract, characters 767–887 · show in text ↑
t0

“Cyamopsis tetragonoloba”

✓ located after whitespace/quote normalisation · title, characters 133–156 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Cotyledon dry weight temporarily increased.

Taxon
Cyamopsis tetragonolobaCyamopsis tetragonolobat0
Organ / stage
cotyledonse0
Outcome
dry weighte0
Direction
temporarily increasede0

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

Cyamopsis tetragonoloba
Cyamopsis tetragonoloba · Taxon · picture from its Wikimedia Commons categoryTon Rulkens · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

e0

“In the cotyledons, the dry weight temporarily increased”

✓ located verbatim in the source · abstract, characters 889–944 · show in text ↑
t0

“Cyamopsis tetragonoloba”

✓ located after whitespace/quote normalisation · title, characters 133–156 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Cotyledon acetone insoluble solids decreased after 84 hours.

Taxon
Cyamopsis tetragonolobaCyamopsis tetragonolobat0
Organ / stage
cotyledonse1
Outcome
acetone‐insoluble‐solidse0
Direction
net decreasee0
Qualifier
84e0

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

Cyamopsis tetragonoloba
Cyamopsis tetragonoloba · Taxon · picture from its Wikimedia Commons categoryTon Rulkens · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

e0

“the acetone‐insoluble‐solids, nitrogen and phosphorus showed only a net decrease after 84, 36 and 36 hr, respectively”

✓ located verbatim in the source · abstract, characters 950–1067 · show in text ↑
e1

“In the cotyledons, the dry weight temporarily increased”

✓ located verbatim in the source · abstract, characters 889–944 · show in text ↑
t0

“Cyamopsis tetragonoloba”

✓ located after whitespace/quote normalisation · title, characters 133–156 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Cotyledon nitrogen and phosphorus decreased after 36 hours.

Taxon
Cyamopsis tetragonolobaCyamopsis tetragonolobat0
Organ / stage
cotyledonse1
Outcome
nitrogen and phosphoruse0
Direction
net decreasee0
Qualifier
36 hre0

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

Cyamopsis tetragonoloba
Cyamopsis tetragonoloba · Taxon · picture from its Wikimedia Commons categoryTon Rulkens · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

e0

“the acetone‐insoluble‐solids, nitrogen and phosphorus showed only a net decrease after 84, 36 and 36 hr, respectively”

✓ located verbatim in the source · abstract, characters 950–1067 · show in text ↑
e1

“In the cotyledons, the dry weight temporarily increased”

✓ located verbatim in the source · abstract, characters 889–944 · show in text ↑
t0

“Cyamopsis tetragonoloba”

✓ located after whitespace/quote normalisation · title, characters 133–156 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Endosperm consisted largely of solid galactomannan without cell lumina.

Taxon
Cyamopsis tetragonolobaCyamopsis tetragonolobat0
Organ / stage
endosperme0
Outcome
a solid mass of galactomannan with essentially no cell luminae0

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

Cyamopsis tetragonoloba
Cyamopsis tetragonoloba · Taxon · picture from its Wikimedia Commons categoryTon Rulkens · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

e0

“the bulk of the endosperm is a solid mass of galactomannan with essentially no cell lumina”

✓ located verbatim in the source · abstract, characters 1150–1240 · show in text ↑
t0

“Cyamopsis tetragonoloba”

✓ located after whitespace/quote normalisation · title, characters 133–156 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

The endosperm aleurone layer was metabolically active.

Taxon
Cyamopsis tetragonolobaCyamopsis tetragonolobat0
Organ / stage
aleuronee0
Outcome
metabolically activee0

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

Cyamopsis tetragonoloba
Cyamopsis tetragonoloba · Taxon · picture from its Wikimedia Commons categoryTon Rulkens · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

e0

“a several‐cell layer (“aleurone”) of thick‐walled cells of similar structure is metabolically active”

✓ located verbatim in the source · abstract, characters 1242–1342 · show in text ↑
t0

“Cyamopsis tetragonoloba”

✓ located after whitespace/quote normalisation · title, characters 133–156 · show in text ↑