Abstract
Abstract Two experiments were conducted to study the effect of grafting on nitrogen‐use efficiency (NUE) in mini‐watermelon plants. In the first study, mini‐watermelon plants ( Citrullus lanatus [Thumb.] Matsum. and Nakai cv. Minirossa) either ungrafted or grafted onto Macis, Vita ( Lagenaria siceraria [Mol.] Standl.), PS1313, and RP15 ( Cucurbita maxima Duchesne × Cucurbita moschata Duchesne) rootstocks grown in hydroponics were compared in terms of shoot dry biomass, leaf area, root‐to‐shoot ratio, SPAD index, shoot N uptake, and nitrate reductase (NR) activity 40 d after transplantation in response to nitrate concentration in the nutrient solution (0.5, 2.5, 5, 10, 15, or 20 mM of NO $ _3^- $ ). In the second experiment, the suitability of a selected rootstock with high NUE (Vita) to improve crop performance and NUE of grafted mini‐watermelon plants was evaluated under field conditions. In the hydroponic experiment mini‐watermelon grafted onto Vita rootstock needed the lowest nitrate concentration (1.31 mM of NO 3 ) in the nutrient solution to reach half maximum shoot dry weight. Total leaf area, SPAD index, and shoot N uptake increased in response to an increase of N concentration in the nutrient solution. At 2.5 mM NO $ _3^- $ , mini‐watermelon grafted on either Vita or RP15 had the highest NR activity whereas no significant difference was observed at 10 mM NO $ _3^- $ . The open‐field study indicated that increasing N‐fertilization rates from 0 to 100 kg ha –1 improved total and marketable yields of mini‐watermelon plants while decreasing NUE. When averaged over N levels, the marketable yield, NUE, N‐uptake efficiency, and N‐utilization efficiency were significantly higher by 39%, 38%, 21%, and 17%, respectively, in Minirossa grafted onto Vita compared to ungrafted Minirossa plants. Therefore, grafting mini‐watermelon plants onto selected rootstocks can be used as a quick and effective method for improving productivity and NUE.
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Claims 11
Claim · model-written summary
Mini-watermelon grafted onto Vita rootstock needed the lowest nitrate concentration, 1.31 mM of NO3, to reach half maximum shoot dry weight.
- Taxon
- Citrullus lanatus
Citrullus lanatuse0 - Treatment
- grafted onto Vita rootstocke1
- Outcome
- nitrate concentratione1
- Direction
- loweste1
- Value
- 1.31 mM of NO 3e1
- Qualifier
- to reach half maximum shoot dry weighte1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Citrullus lanatus [Thumb.] Matsum. and Nakai cv. Minirossa”
e1“grafted onto Vita rootstock needed the lowest nitrate concentration (1.31 mM of NO 3 ) in the nutrient solution to reach half maximum shoot dry weight”
Claim · model-written summary
Total leaf area, SPAD index and shoot N uptake increased with increasing N concentration in the nutrient solution.
- Taxon
- Citrullus lanatusCitrullus lanatuse0
- Treatment
- an increase of N concentration in the nutrient solutione2
- Outcome
- Total leaf area, SPAD index, and shoot N uptakee2
- Direction
- increasede2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Citrullus lanatus [Thumb.] Matsum. and Nakai cv. Minirossa”
e2“Total leaf area, SPAD index, and shoot N uptake increased in response to an increase of N concentration in the nutrient solution”
Claim · model-written summary
Grafting on Vita or RP15 gave the highest nitrate reductase activity at 2.5 mM nitrate.
- Taxon
- Citrullus lanatusCitrullus lanatuse0
- Treatment
- grafted on either Vita or RP15e3
- Outcome
- NR activitye3
- Direction
- higheste3
- Qualifier
- 2.5 mMe4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Citrullus lanatus [Thumb.] Matsum. and Nakai cv. Minirossa”
e3“grafted on either Vita or RP15 had the highest NR activity”
e4“At 2.5 mM NO $ _3^- $”
Claim · model-written summary
No significant difference in NR activity was observed at 10 mM nitrate.
- Taxon
- Citrullus lanatusCitrullus lanatuse0
- Treatment
- 10 mMe5
- Outcome
- NR activitye3
- Direction
- no significant differencee5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Citrullus lanatus [Thumb.] Matsum. and Nakai cv. Minirossa”
e3“grafted on either Vita or RP15 had the highest NR activity”
e5“no significant difference was observed at 10 mM”
Claim · model-written summary
Increasing N-fertilization from 0 to 100 kg ha –1 improved total and marketable yields.
- Taxon
- Citrullus lanatusCitrullus lanatuse0
- Treatment
- 0 to 100 kg ha –1e6
- Outcome
- total and marketable yieldse6
- Direction
- improvede6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Citrullus lanatus [Thumb.] Matsum. and Nakai cv. Minirossa”
e6“from 0 to 100 kg ha –1 improved total and marketable yields”
Claim · model-written summary
Increasing N-fertilization from 0 to 100 kg ha –1 decreased nitrogen-use efficiency.
- Taxon
- Citrullus lanatusCitrullus lanatuse0
- Treatment
- 0 to 100 kg ha –1e6
- Outcome
- NUEe7
- Direction
- decreasinge7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Citrullus lanatus [Thumb.] Matsum. and Nakai cv. Minirossa”
e6“from 0 to 100 kg ha –1 improved total and marketable yields”
e7“while decreasing NUE”
Claim · model-written summary
Grafting onto Vita gave a 39% higher marketable yield than ungrafted Minirossa, averaged over N levels.
- Taxon
- Citrullus lanatusCitrullus lanatuse0
- Material
- Minirossae2
- Treatment
- grafted onto Vitae2
- Outcome
- marketable yielde3
- Direction
- highere1
- Value
- 39%e1
- Comparator
- ungrafted Minirossa plantse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Citrullus lanatus [Thumb.] Matsum. and Nakai cv. Minirossa”
e1“significantly higher by 39%, 38%, 21%, and 17%, respectively”
e2“Minirossa grafted onto Vita compared to ungrafted Minirossa plants”
e3“the marketable yield”
Claim · model-written summary
Grafting onto Vita gave a 38% higher NUE than ungrafted Minirossa, averaged over N levels.
- Taxon
- Citrullus lanatusCitrullus lanatuse0
- Material
- Minirossae2
- Treatment
- grafted onto Vitae2
- Outcome
- NUEe3
- Direction
- highere1
- Value
- 38%e1
- Comparator
- ungrafted Minirossa plantse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Citrullus lanatus [Thumb.] Matsum. and Nakai cv. Minirossa”
e1“significantly higher by 39%, 38%, 21%, and 17%, respectively”
e2“Minirossa grafted onto Vita compared to ungrafted Minirossa plants”
e3“the marketable yield, NUE”
Claim · model-written summary
Grafting onto Vita gave a 21% higher N-uptake efficiency than ungrafted Minirossa, averaged over N levels.
- Taxon
- Citrullus lanatusCitrullus lanatuse0
- Material
- Minirossae2
- Treatment
- grafted onto Vitae2
- Outcome
- N‐uptake efficiencye3
- Direction
- highere1
- Value
- 21%e1
- Comparator
- ungrafted Minirossa plantse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Citrullus lanatus [Thumb.] Matsum. and Nakai cv. Minirossa”
e1“significantly higher by 39%, 38%, 21%, and 17%, respectively”
e2“Minirossa grafted onto Vita compared to ungrafted Minirossa plants”
e3“N‐uptake efficiency”
Claim · model-written summary
Grafting onto Vita gave a 17% higher N-utilization efficiency than ungrafted Minirossa, averaged over N levels.
- Taxon
- Citrullus lanatusCitrullus lanatuse0
- Material
- Minirossae2
- Treatment
- grafted onto Vitae2
- Outcome
- N‐utilization efficiencye3
- Direction
- highere1
- Value
- 17%e1
- Comparator
- ungrafted Minirossa plantse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Citrullus lanatus [Thumb.] Matsum. and Nakai cv. Minirossa”
e1“significantly higher by 39%, 38%, 21%, and 17%, respectively”
e2“Minirossa grafted onto Vita compared to ungrafted Minirossa plants”
e3“N‐utilization efficiency”
Claim · model-written summary
Grafting mini-watermelon onto selected rootstocks can be used as a quick and effective method for improving productivity and NUE.
- Taxon
- Citrullus lanatusCitrullus lanatuse0
- Outcome
- productivity and NUEe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Citrullus lanatus [Thumb.] Matsum. and Nakai cv. Minirossa”
e1“can be used as a quick and effective method for improving productivity and NUE”
The same questions in other papers
grafting · quality: postharvest · Citrullus lanatus (watermelon)Positive and negative results
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- positive
- positive
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19 papers more in this group
See all 23 papers →grafting · nutrient: efficiency · Citrullus lanatus (watermelon)Results agree
2 papers in the same direction as this paper
- positive
- positive
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.