Abstract
Plant response mechanisms for acid soil tolerance adaptability are generally unknown. Sorghum [Sorghum bicolor (L.) Moench] cultivars (Funk G522DR, GP 140, SC 599, TAM 428, SC 283, and SC 574) were grown in white quartz flintshot sand and watered with 0.01 M sodium acetate buffer at pH 4.0, 4.5, 5.0, 5.5, or 6.0 with concurrent treatments of Ca++ (0, 10, 100 mgl‐1 as CaCl2) or Mn++ (0, 1.4, 140.0 mgl‐1 as MnCl2). At the acid soil tolerance impact response phase (<10 days old), Ca++ or Mn++ did not influence seed germination (i.e., radicle exsertion). Ca++ did not influence initial shoot growth. Increased H+ concentration greatly inhibited juvenile shoot growth equivalently in all six cultivars. This inhibition was explicable as an influence of gibberellic acid (GA) availability to the aleurone layer and was explained as an accumulation (partitioning) of GA into lipid cellular constituents. Excess Mn++ further exacerbates this condition by limiting GA biosynthesis.
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Claims 6
Claim · model-written summary
Ca++ did not influence sorghum seed germination.
SorghumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ca++ or Mn++ did not influence seed germination (i.e., radicle exsertion)”
t0“sorghum”
Claim · model-written summary
Mn++ did not influence sorghum seed germination.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ca++ or Mn++ did not influence seed germination (i.e., radicle exsertion)”
t0“sorghum”
Claim · model-written summary
Ca++ did not influence initial sorghum shoot growth.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ca++ did not influence initial shoot growth”
t0“sorghum”
Claim · model-written summary
Higher H+ concentration strongly inhibited juvenile shoot growth in all six sorghum cultivars.
- Treatment
- Increased H+ concentratione0
- Outcome
- juvenile shoot growthe0
- Direction
- inhibitede0
- Qualifier
- all six cultivarse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increased H+ concentration greatly inhibited juvenile shoot growth equivalently in all six cultivars”
t0“sorghum”
Claim · model-written summary
The authors attributed the H+ growth inhibition to GA availability and partitioning into lipid constituents.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This inhibition was explicable as an influence of gibberellic acid (GA) availability to the aleurone layer and was explained as an accumulation (partitioning) of GA into lipid cellular constituents”
t0“sorghum”
Claim · model-written summary
Excess Mn++ exacerbated the growth inhibition by limiting GA biosynthesis.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Excess Mn++ further exacerbates this condition by limiting GA biosynthesis”
t0“sorghum”
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See all 11 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.