Abstract
The distribution of the pyrimidinone glucopyranosides vicine and convicine was investigated in resting seed and axenic developing seedlings up to 17 days of age in Vicia faba cv Troy, a low seed pyrimidinone glucopyranoside mutant (MTG5) derived from Troy, and a related species V narbonensis. The lower amounts of total vicine and convicine in resting seed of MTG5 were due primarily to a reduction in cotyledon pyrimidinone glucopyranosides, with the amount in the embryo axis much less affected. Distribution within developing seedlings revealed consistent patterns. A pulse of vicine appeared in both species in stems and roots at day 4 to day 7, then declined. Amounts of convicine rose initially then declined in seedling stems of both species, whereas in roots the rise in convicine continued throughout the period. The rise in convicine in the roots of V narbonensis could not have been accounted for by conversion from reserves of vicine. The low pyrimidinone glucopyranoside mutant MTG5 had less vicine initially in stems and roots than both Troy and V. narbonensis but by 17 days this had risen close to the levels of Troy and exceeded those of V narbonensis. By flowering, amounts of vicine and convicine in glass-house grown plants were similar in MTG5 and Troy. The levels of both compounds in the roots of MTG5 exceeded those of the sown seed. Consequently, both V faba and V narbonensis have the capacity to synthesise vicine and convicine in young plants. A mutation in a gene controlling levels of pyrimidinone glucopyranosides in the developing seed of V faba does not suppress the biosynthetic ability of young plants.
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Claims 12
Claim · model-written summary
Lower seed vicine and convicine in MTG5 came mainly from reduced cotyledon glucopyranosides.
- Taxon
- Vicia faba
Vicia fabat0 - Material
- MTG5e0
- Organ / stage
- cotyledone0
- Outcome
- lower amounts of total vicine and convicinee0
- Direction
- reductione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The lower amounts of total vicine and convicine in resting seed of MTG5 were due primarily to a reduction in cotyledon pyrimidinone glucopyranosides”
t0“Vicia faba”
Claim · model-written summary
Embryo axis glucopyranoside amount was much less affected in MTG5.
- Taxon
- Vicia fabaVicia fabat0
- Organ / stage
- embryo axise0
- Outcome
- amount in the embryo axise0
- Direction
- less affectede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with the amount in the embryo axis much less affected”
t0“Vicia faba”
Claim · model-written summary
Vicine rose in stems and roots of both species at days four to seven, then declined.
- Taxon
- Vicia faba and Vicia narbonensisVicia faba
Vicia narbonensist0 - Organ / stage
- stems and rootse0
- Outcome
- vicinee0
- Direction
- declinede0
- Qualifier
- day 4 to day 7e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A pulse of vicine appeared in both species in stems and roots at day 4 to day 7, then declined”
t0“Vicia faba and Vicia narbonensis”
Claim · model-written summary
Convicine rose initially then declined in stems of both species.
- Taxon
- Vicia faba and Vicia narbonensisVicia fabaVicia narbonensist0
- Organ / stage
- seedling stemse0
- Outcome
- Amounts of convicinee0
- Direction
- declinede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Amounts of convicine rose initially then declined in seedling stems of both species”
t0“Vicia faba and Vicia narbonensis”
Claim · model-written summary
Convicine continued to rise in roots of both species.
- Taxon
- Vicia faba and Vicia narbonensisVicia fabaVicia narbonensist0
- Organ / stage
- rootse0
- Outcome
- convicinee0
- Direction
- risee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“whereas in roots the rise in convicine continued throughout the period”
t0“Vicia faba and Vicia narbonensis”
Claim · model-written summary
The rise in V. narbonensis root convicine could not be explained by conversion of vicine reserves.
- Taxon
- V narbonensisVicia narbonensise0
- Organ / stage
- rootse0
- Outcome
- rise in convicinee0
- Qualifier
- could not have been accounted for by conversion from reserves of vicinee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The rise in convicine in the roots of V narbonensis could not have been accounted for by conversion from reserves of vicine”
Claim · model-written summary
MTG5 initially had less vicine in stems and roots than Troy and V. narbonensis.
- Taxon
- Vicia fabaVicia fabat0
- Material
- MTG5e0
- Outcome
- vicinee0
- Direction
- lesse0
- Comparator
- Troy and V. narbonensise0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“MTG5 had less vicine initially in stems and roots than both Troy and V. narbonensis”
t0“Vicia faba”
Claim · model-written summary
By day 17, MTG5 vicine approached Troy levels and exceeded V. narbonensis.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“by 17 days this had risen close to the levels of Troy and exceeded those of V narbonensis”
t0“Vicia faba”
e1“MTG5 had less vicine initially in stems and roots than both Troy and V. narbonensis”
Claim · model-written summary
At flowering, MTG5 and Troy had similar vicine and convicine amounts.
- Taxon
- Vicia fabaVicia fabat0
- Material
- MTG5e0
- Organ / stage
- floweringe0
- Outcome
- amounts of vicine and convicinee0
- Direction
- similare0
- Comparator
- Troye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“By flowering, amounts of vicine and convicine in glass-house grown plants were similar in MTG5 and Troy”
t0“Vicia faba”
Claim · model-written summary
MTG5 roots had more vicine and convicine than the sown seed.
- Taxon
- Vicia fabaVicia fabat0
- Material
- MTG5e0
- Outcome
- levels of both compoundse0
- Direction
- exceedede0
- Comparator
- the sown seede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The levels of both compounds in the roots of MTG5 exceeded those of the sown seed”
t0“Vicia faba”
Claim · model-written summary
Both Vicia species can synthesize vicine and convicine in young plants.
- Taxon
- V faba and V narbonensisVicia fabaVicia narbonensise0
- Organ / stage
- young plantse0
- Outcome
- capacity to synthesise vicine and convicinee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“both V faba and V narbonensis have the capacity to synthesise vicine and convicine in young plants”
Claim · model-written summary
The seed glucopyranoside mutation does not suppress young plant biosynthesis.
- Taxon
- V fabaVicia fabae0
- Gene
- gene controlling levels of pyrimidinone glucopyranosidese0
- Outcome
- biosynthetic ability of young plantse0
- Direction
- does not suppresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A mutation in a gene controlling levels of pyrimidinone glucopyranosides in the developing seed of V faba does not suppress the biosynthetic ability of young plants”