Abstract
Jerusalem artichoke, a widely consumed edible, is an excellent source of inulin and selected phytochemicals. However, the improvement of its chemical composition by potassium fertilization has not yet been studied. Thus, the aim of the study was to evaluate the effect of different potassium (K) fertilization levels (K2O 150 kg ha−1, 250 kg ha−1, 350 kg ha−1) on the content of inulin; profile and changes in polyphenolic compounds; and the antioxidant capacity, including on-line ABTS antioxidant profiles of freeze-dried tubers originated from Violette de Rennes, Topstar, and Waldspindel cultivars. Inulin content was highest in the early maturing cv. Topstar. The application of 350 kg ha−1 of K fertilizer rates during the growth of cv. Topstar increased the inulin content of tubers by 13.2% relative to the lowest K fertilizer rate of 150 kg ha−1. In cv. Violette de Rennes, inulin accumulation increased in response to the fertilizer rate of 250 kg ha−1. A further increase in K fertilizer rates had no effect on inulin content. The inulin content of cv. Waldspindel was not modified by any of the tested K fertilizer rates. Thus, the accumulation of the inulin was cultivar-dependent. In the cultivars analyzed, 11 polyphenolic compounds were identified and polyphenolic compound content was affected by the applied rate of potassium fertilizer, which was dependent on the cultivar. Chlorogenic acid was the predominant phenolic acid in all cultivars, and it accounted for around 66.4% of the identified polyphenolic compounds in cv. Violette de Rennes and for around 77% of polyphenolic compounds in cv. Waldspindel and Topstar.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 10
Claim · model-written summary
Inulin content was highest in the early maturing cv. Topstar among the cultivars tested.
- Taxon
- Helianthus tuberosus
.jpg?width=60)
Helianthus tuberosust0 - Material
- cv. Topstare1
- Outcome
- Inulin contente1
- Direction
- higheste1
- Qualifier
- early maturinge1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
t0“Helianthus tuberosus L.”
e1“Inulin content was highest in the early maturing cv. Topstar”
Claim · model-written summary
Applying 350 kg ha−1 of K fertilizer during growth increased tuber inulin content of cv. Topstar by 13.2% relative to 150 kg ha−1.
- Taxon
- Helianthus tuberosusHelianthus tuberosust0
- Material
- cv. Topstare2
- Organ / stage
- tuberse2
- Treatment
- 350 kg ha−1 of K fertilizere2
- Outcome
- inulin contente2
- Direction
- increasede2
- Value
- 13.2%e2
- Comparator
- lowest K fertilizer rate of 150 kg ha−1e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Helianthus tuberosus L.”
e2“The application of 350 kg ha−1 of K fertilizer rates during the growth of cv. Topstar increased the inulin content of tubers by 13.2% relative to the lowest K fertilizer rate of 150 kg ha−1”
Claim · model-written summary
Inulin accumulation in cv. Violette de Rennes increased in response to 250 kg ha−1 K fertilizer.
- Taxon
- Helianthus tuberosusHelianthus tuberosust0
- Material
- cv. Violette de Rennese3
- Treatment
- fertilizer rate of 250 kg ha−1e3
- Outcome
- inulin accumulatione3
- Direction
- increasede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Helianthus tuberosus L.”
e3“In cv. Violette de Rennes, inulin accumulation increased in response to the fertilizer rate of 250 kg ha−1”
Claim · model-written summary
Further increases in K fertilizer rates had no effect on inulin content.
- Taxon
- Helianthus tuberosusHelianthus tuberosust0
- Treatment
- A further increase in K fertilizer ratese4
- Outcome
- inulin contente4
- Direction
- had no effecte4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Helianthus tuberosus L.”
e4“A further increase in K fertilizer rates had no effect on inulin content”
Claim · model-written summary
Inulin content of cv. Waldspindel was not modified by any of the tested K fertilizer rates.
- Taxon
- Helianthus tuberosusHelianthus tuberosust0
- Material
- cv. Waldspindele5
- Treatment
- tested K fertilizer ratese5
- Outcome
- inulin contente5
- Direction
- not modifiede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Helianthus tuberosus L.”
e5“The inulin content of cv. Waldspindel was not modified by any of the tested K fertilizer rates”
Claim · model-written summary
Eleven polyphenolic compounds were identified in the cultivars analyzed.
- Taxon
- Helianthus tuberosusHelianthus tuberosust0
- Outcome
- 11 polyphenolic compounds were identifiede6
- Value
- 11e6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Helianthus tuberosus L.”
e6“11 polyphenolic compounds were identified and polyphenolic compound content was affected by the applied rate of potassium fertilizer, which was dependent on the cultivar”
Claim · model-written summary
The applied rate of potassium fertilizer affected polyphenolic compound content, depending on the cultivar.
- Taxon
- Helianthus tuberosusHelianthus tuberosust0
- Treatment
- applied rate of potassium fertilizere6
- Outcome
- polyphenolic compound contente6
- Qualifier
- which was dependent on the cultivare6
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Helianthus tuberosus L.”
e6“11 polyphenolic compounds were identified and polyphenolic compound content was affected by the applied rate of potassium fertilizer, which was dependent on the cultivar”
Claim · model-written summary
Chlorogenic acid was the predominant phenolic acid in all cultivars.
- Taxon
- Helianthus tuberosusHelianthus tuberosust0
- Material
- all cultivarse7
- Compound
- Chlorogenic acide7
- Outcome
- predominant phenolic acide7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Helianthus tuberosus L.”
e7“Chlorogenic acid was the predominant phenolic acid in all cultivars, and it accounted for around 66.4% of the identified polyphenolic compounds in cv. Violette de Rennes and for around 77% of polyphenolic compounds in cv. Waldspindel and Topstar”
Claim · model-written summary
Chlorogenic acid accounted for around 66.4% of the identified polyphenolic compounds in cv. Violette de Rennes.
- Taxon
- Helianthus tuberosusHelianthus tuberosust0
- Material
- cv. Violette de Rennese7
- Compound
- Chlorogenic acide7
- Outcome
- identified polyphenolic compoundse7
- Value
- around 66.4%e7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Helianthus tuberosus L.”
e7“Chlorogenic acid was the predominant phenolic acid in all cultivars, and it accounted for around 66.4% of the identified polyphenolic compounds in cv. Violette de Rennes and for around 77% of polyphenolic compounds in cv. Waldspindel and Topstar”
Claim · model-written summary
Chlorogenic acid accounted for around 77% of polyphenolic compounds in cv. Waldspindel and Topstar.
- Taxon
- Helianthus tuberosusHelianthus tuberosust0
- Material
- cv. Waldspindel and Topstare7
- Compound
- Chlorogenic acide7
- Outcome
- polyphenolic compoundse7
- Value
- around 77%e7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Helianthus tuberosus L.”
e7“Chlorogenic acid was the predominant phenolic acid in all cultivars, and it accounted for around 66.4% of the identified polyphenolic compounds in cv. Violette de Rennes and for around 77% of polyphenolic compounds in cv. Waldspindel and Topstar”
The same questions in other papers
fertilization · molecular: metabolites · Helianthus tuberosus (Jerusalem artichoke)Positive and negative results
6 papers in the same direction as this paper · 2 in the opposite direction
- negative
- no effect
- positive
5 papers more in this group
See all 9 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.