Abstract
The Asian Soybean Rust caused by the fungus Phakopsora pachyrhizi is one of the serious phytosanitary problems faced by soybean [Glycine max (L.) Merrill], which cause up to 80% yield loss. An alternative for the integrated management of the disease is the use of mineral nutrition together with phytosanitary treatments. Thus, the objective of this study is to understand the effect of foliar fortification with copper (Cu) along with phytosanitary treatments in the soybean reaction to Rust by lignin content variation in leaf tissues, and how it reflects the yield. The experimental design was a randomized block with four replicates. Four concentrations Cu (30, 60, 90, 120 g Cu ha-1) were tested in two distinct sources (cuprous oxide and copper carbonate) together with phytosanitary treatments. Evaluations were made to determine the progression of Asian Rust severity, micronutrient content in leaves and grains, as well as lignin content in leaves. The grain yield components and productivity were also evaluated. The Cu contents in the soybean leaves and grains were influenced by foliar spraying. Foliar spray with Cu retarded the disease progression, reducing the severity of Asian Rust and positively impacting grain yield. The amount of lignin present in the leaves was altered considerably with the application of the Cu associated with phytosanitary treatments. The results suggest that the leaf nutrition with copper together with phytosanitary treatments, may reduce the rust severity and improvement the plant performance. Future research with Cu application and analysis of specific enzymes, secondary metabolites and cell wall thickness may further contribute to the understanding of the role of Cu in defence against Asian Soybean Rust.
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Claims 5
Claim · model-written summary
Foliar copper spraying altered Cu content in soybean leaves.
- Taxon
- soybean
Glycine maxe0 - Treatment
- foliar sprayinge0
- Outcome
- Cu contents in the soybean leavese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The Cu contents in the soybean leaves and grains were influenced by foliar spraying.”
Claim · model-written summary
Foliar copper spraying altered Cu content in soybean grains.
- Taxon
- soybeanGlycine maxe0
- Treatment
- foliar sprayinge0
- Outcome
- Cu contents in the soybean leaves and grainse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The Cu contents in the soybean leaves and grains were influenced by foliar spraying.”
Claim · model-written summary
Foliar Cu slowed Asian soybean rust progression and reduced its severity.
- Taxon
- Glycine max L.Glycine maxt0
- Treatment
- Foliar spray with Cue0
- Interactor
- Phakopsora pachyrhiziPhakopsora pachyrhizit0pathogene0
- Outcome
- severity of Asian Ruste0
- Direction
- reducinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Foliar spray with Cu retarded the disease progression, reducing the severity of Asian Rust”
t0“Foliar fortification of Copper (Cu) in Glycine max L. for the protection against Asian Soybean Rust (Phakopsora pachyrhizi Syd. & P.Syd.)”
Claim · model-written summary
Foliar Cu positively affected soybean grain yield.
- Taxon
- soybeanGlycine maxt0
- Treatment
- Foliar spray with Cue0
- Outcome
- grain yielde0
- Direction
- positively impactinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Foliar spray with Cu retarded the disease progression, reducing the severity of Asian Rust and positively impacting grain yield.”
t0“soybean”
Claim · model-written summary
Cu with phytosanitary treatments considerably altered leaf lignin content.
- Taxon
- soybeanGlycine maxt0
- Treatment
- application of the Cu associated with phytosanitary treatmentse0
- Outcome
- amount of lignin present in the leavese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The amount of lignin present in the leaves was altered considerably with the application of the Cu associated with phytosanitary treatments.”
t0“soybean”
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