Abstract
Abstract The leaves of intact soybean plants (Glycine max. L. Merrill) characteristically turn yellow and abscise during pod maturation, and this may limit seed growth. We have used soybean expiants (excised 10 cm stem sections with a leaf and midfill pod attached) to study interactive effects of nutrient and hormone supply on leaf senescence symptoms and seed yield. Whereas mineral nutrients or cytokinin (zeatin) alone delayed development of visible leaf senescence symptoms in explants, a combination of mineral nutrients with zeatin acted synergistically to maintain green coloration throughout pod maturation and reduced declines in levels of leafsoluble protein and chlorophyll. The combination of complete mineral nutrients with zeatin gave seed yields equivalent to those in intact plants. Withdrawal of zeatin or individual mineral nutrients (particularly N and S) from the nutrient solution enhanced leaf senescence symptoms and reduced seed yields.
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Claims 7
Claim · model-written summary
Mineral nutrients alone delayed development of visible leaf senescence symptoms in soybean explants.
- Taxon
- soybean
Glycine maxt0 - Treatment
- mineral nutrientse1
- Outcome
- visible leaf senescence symptomse1
- Direction
- delayede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soybean explants”
e1“mineral nutrients or cytokinin (zeatin) alone delayed development of visible leaf senescence symptoms in explants”
Claim · model-written summary
Cytokinin (zeatin) alone delayed development of visible leaf senescence symptoms in soybean explants.
- Taxon
- soybeanGlycine maxt0
- Treatment
- cytokinin (zeatin)e1
- Outcome
- visible leaf senescence symptomse1
- Direction
- delayede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soybean explants”
e1“mineral nutrients or cytokinin (zeatin) alone delayed development of visible leaf senescence symptoms in explants”
Claim · model-written summary
A combination of mineral nutrients with zeatin acted synergistically to maintain green coloration of soybean explant leaves throughout pod maturation.
- Taxon
- soybeanGlycine maxt0
- Treatment
- a combination of mineral nutrients with zeatine1
- Outcome
- green coloratione1
- Direction
- maintaine1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soybean explants”
e1“a combination of mineral nutrients with zeatin acted synergistically to maintain green coloration throughout pod maturation”
Claim · model-written summary
The combination of mineral nutrients with zeatin reduced declines in levels of leaf soluble protein and chlorophyll during pod maturation.
- Taxon
- soybeanGlycine maxt0
- Treatment
- a combination of mineral nutrients with zeatine1
- Outcome
- levels of leafsoluble protein and chlorophylle1
- Direction
- reduced declinese1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soybean explants”
e1“a combination of mineral nutrients with zeatin acted synergistically to maintain green coloration throughout pod maturation and reduced declines in levels of leafsoluble protein and chlorophyll”
Claim · model-written summary
The combination of complete mineral nutrients with zeatin gave soybean explant seed yields equivalent to those in intact plants.
- Taxon
- soybeanGlycine maxt0
- Treatment
- The combination of complete mineral nutrients with zeatine1
- Outcome
- seed yieldse1
- Direction
- equivalente1
- Comparator
- intact plantse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soybean explants”
e1“The combination of complete mineral nutrients with zeatin gave seed yields equivalent to those in intact plants”
Claim · model-written summary
Withdrawal of zeatin or individual mineral nutrients (particularly N and S) from the nutrient solution enhanced leaf senescence symptoms in soybean explants.
- Taxon
- soybeanGlycine maxt0
- Treatment
- Withdrawal of zeatin or individual mineral nutrientse1
- Outcome
- leaf senescence symptomse1
- Direction
- enhancede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soybean explants”
e1“Withdrawal of zeatin or individual mineral nutrients (particularly N and S) from the nutrient solution enhanced leaf senescence symptoms and reduced seed yields”
Claim · model-written summary
Withdrawal of zeatin or individual mineral nutrients (particularly N and S) from the nutrient solution reduced seed yields in soybean explants.
- Taxon
- soybeanGlycine maxt0
- Treatment
- Withdrawal of zeatin or individual mineral nutrientse1
- Outcome
- seed yieldse1
- Direction
- reducede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soybean explants”
e1“Withdrawal of zeatin or individual mineral nutrients (particularly N and S) from the nutrient solution enhanced leaf senescence symptoms and reduced seed yields”
The same questions in other papers
zeatin · disease · Glycine max (soybean)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
mineral nutrient · disease · Glycine max (soybean)Results agree
2 papers in the same direction as this paper
- positive
- positive
class · disease · Glycine max (soybean)Positive and negative results
8 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
6 papers more in this group
See all 10 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.