Abstract
During normal bean leaf growth, there was almost no change in the solubility classes of glycoprotein. Chloroplasts from mature leaves contained one-third of the insoluble glycoprotein. Glucosamine feeding produced a 10-fold increase in the insoluble glycoprotein of chloroplasts within 16 h. This was accompanied by the appearance of particles surrounding the starch grains and a considerable decrease in starch content.The low and fairly uniform levels of glycoproteins in growing leaves suggest that they play consistent structural or enzymic role rather than serving as reserve foodstuffs as in seeds. However, the abrupt increase in chloroplast glycoprotein upon feeding glucosamine indicates that the synthesis of this special glycoprotein is limited by endogenous precursors.
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Claims 7
Claim · model-written summary
Glycoprotein solubility classes changed little during normal bean leaf growth.
Verbatim
e0“During normal bean leaf growth, there was almost no change in the solubility classes of glycoprotein.”
Claim · model-written summary
Mature bean leaf chloroplasts contained one-third of insoluble glycoprotein.
Verbatim
e0“Chloroplasts from mature leaves contained one-third of the insoluble glycoprotein.”
t0“Glycoproteins containing hexosamine in bean leaves”
Claim · model-written summary
Glucosamine feeding increased chloroplast insoluble glycoprotein tenfold within 16 hours.
- Taxon
- beant0
- Treatment
- Glucosamine feedinge0
- Outcome
- insoluble glycoprotein of chloroplastse0
- Direction
- increasee0
- Value
- 10-folde0
- Qualifier
- within 16 he0
Not reportedComparator
Verbatim
e0“Glucosamine feeding produced a 10-fold increase in the insoluble glycoprotein of chloroplasts within 16 h.”
t0“Glycoproteins containing hexosamine in bean leaves”
Claim · model-written summary
Glucosamine feeding was accompanied by particles surrounding starch grains in bean chloroplasts.
Verbatim
e0“This was accompanied by the appearance of particles surrounding the starch grains and a considerable decrease in starch content.”
t0“Glycoproteins containing hexosamine in bean leaves”
Claim · model-written summary
Glucosamine feeding was accompanied by decreased starch content in bean leaves.
Verbatim
e0“This was accompanied by the appearance of particles surrounding the starch grains and a considerable decrease in starch content.”
t0“Glycoproteins containing hexosamine in bean leaves”
Claim · model-written summary
The authors interpret uniform leaf glycoprotein levels as indicating structural or enzymic rather than reserve roles.
Verbatim
e0“The low and fairly uniform levels of glycoproteins in growing leaves suggest that they play consistent structural or enzymic role rather than serving as reserve foodstuffs as in seeds.”
t0“Glycoproteins containing hexosamine in bean leaves”
Claim · model-written summary
The authors infer that endogenous precursors limit synthesis of chloroplast glycoprotein.
Verbatim
e0“the abrupt increase in chloroplast glycoprotein upon feeding glucosamine indicates that the synthesis of this special glycoprotein is limited by endogenous precursors.”
t0“Glycoproteins containing hexosamine in bean leaves”
The same questions in other papers
glucosamine · molecular: metabolites · Phaseolus vulgaris (common bean)Positive and negative results
1 in the opposite direction
- no effect
infection · molecular: metabolites · Phaseolus vulgaris (common bean)Positive and negative results
2 papers in the same direction as this paper · 3 in the opposite direction
- no effect
- negative
- negative
2 papers more in this group
See all 6 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.