Abstract
The deleterious effects of both Mn deficiency and excess on the development of plants have been evaluated with regard to aspects of shoot anatomy, ultrastructure and biochemistry, focusing mainly on the manifestation of visual symptoms. However, there is little information in the literature on changes in the root system in response to Mn supply. The objective of this study was to evaluate the effects of Mn doses (0.5, 2.0 and 200.0 μmol L-1) in a nutrient solution on the anatomy of leaves and roots of the Glycine max (L.) cultivars Santa Rosa, IAC-15 and IAC-Foscarin 31. Visual deficiency symptoms were first observed in Santa Rosa and IAC-15, which were also the only cultivars where Mn-toxicity symptoms were observed. Only in IAC-15, a high Mn supply led to root diameter thickening, but without alteration in cells of the bark, epidermis, exodermis and endodermis. The degree of disorganization of the xylem vessels, in particular the metaxylem, differed in the cultivars. Quantity and shape of the palisade parenchyma cells were influenced by both Mn deficiency and toxicity. A reduction in the number of chloroplasts was observed in the three Mn-deficient genotypes. The anatomical alterations in IAC-15 due to nutritional stress were greater, as expressed in extensive root cell cytoplasm disorganization and increased vacuolation at high Mn doses. The degree of changes in the anatomical and ultrastructural organization of roots and leaves of the soybean genotypes studied differed, suggesting the existence of tolerance mechanisms to different intensities of Mn deficiency or excess.
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Claims 9
Claim · model-written summary
Deficiency symptoms appeared first in Santa Rosa and IAC-15; these were the only cultivars with toxicity symptoms.
- Taxon
- soybean
Glycine maxt0 - Material
- Santa Rosae0
- Outcome
- Visual deficiency symptomse0
Not reportedOrgan / stageDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soybean”
e0“Visual deficiency symptoms were first observed in Santa Rosa and IAC-15, which were also the only cultivars where Mn-toxicity symptoms were observed”
Claim · model-written summary
High manganese supply thickened root diameter only in IAC-15.
- Taxon
- soybeanGlycine maxt0
- Material
- IAC-15e0
- Organ / stage
- roote0
- Treatment
- high Mn supplye0
- Outcome
- root diametere0
- Direction
- thickeninge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soybean”
e0“Only in IAC-15, a high Mn supply led to root diameter thickening”
Claim · model-written summary
High manganese did not alter IAC-15 bark, epidermis, exodermis or endodermis cells.
- Taxon
- soybeanGlycine maxt0
- Material
- IAC-15e0
- Treatment
- high Mn supplye0
- Outcome
- cells of the bark, epidermis, exodermis and endodermise0
- Direction
- without alteratione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soybean”
e0“Only in IAC-15, a high Mn supply led to root diameter thickening, but without alteration in cells of the bark, epidermis, exodermis and endodermis”
Claim · model-written summary
Xylem vessel disorganization differed among cultivars.
- Taxon
- soybeanGlycine maxt0
- Organ / stage
- metaxyleme0
- Outcome
- degree of disorganization of the xylem vesselse0
- Direction
- differede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soybean”
e0“The degree of disorganization of the xylem vessels, in particular the metaxylem, differed in the cultivars”
Claim · model-written summary
Manganese deficiency and toxicity changed palisade parenchyma cell number and shape.
- Taxon
- soybeanGlycine maxt0
- Treatment
- Mn deficiency and toxicitye0
- Outcome
- Quantity and shape of the palisade parenchyma cellse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soybean”
e0“Quantity and shape of the palisade parenchyma cells were influenced by both Mn deficiency and toxicity”
Claim · model-written summary
All three genotypes had fewer chloroplasts under manganese deficiency.
- Taxon
- soybeanGlycine maxt0
- Treatment
- Mn-deficiente0
- Outcome
- number of chloroplastse0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soybean”
e0“A reduction in the number of chloroplasts was observed in the three Mn-deficient genotypes”
Claim · model-written summary
IAC-15 had extensive root cell cytoplasm disorganization under nutritional stress.
- Taxon
- soybeanGlycine maxt0
- Material
- IAC-15e0
- Treatment
- nutritional stresse0
- Outcome
- root cell cytoplasm disorganizatione0
- Direction
- greatere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soybean”
e0“The anatomical alterations in IAC-15 due to nutritional stress were greater, as expressed in extensive root cell cytoplasm disorganization and increased vacuolation at high Mn doses”
Claim · model-written summary
High manganese doses increased vacuolation in IAC-15 roots.
- Taxon
- soybeanGlycine maxt0
- Material
- IAC-15e0
- Treatment
- high Mn dosese0
- Outcome
- vacuolatione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soybean”
e0“The anatomical alterations in IAC-15 due to nutritional stress were greater, as expressed in extensive root cell cytoplasm disorganization and increased vacuolation at high Mn doses”
Claim · model-written summary
Root and leaf anatomical and ultrastructural changes differed among soybean genotypes.
- Taxon
- soybeanGlycine maxt0
- Outcome
- degree of changes in the anatomical and ultrastructural organization of roots and leavese0
- Direction
- differede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“soybean”
e0“The degree of changes in the anatomical and ultrastructural organization of roots and leaves of the soybean genotypes studied differed”
The same questions in other papers
manganese atom · growth · Glycine max (soybean)Results differ
17 papers in the same direction as this paper · 13 in the opposite direction
- negative
- negative
- positive
27 papers more in this group
See all 31 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.