Abstract
Low-temperature storage is a technique to hold seedlings for a short period of time to adjust the production schedule of young seedlings. Labor-intensive grafting propagation can potentially benefit from the effective use of this technique to minimize peak labor inputs. Watermelon ( Citrullus lanatus ) seedlings are generally chilling sensitive and therefore difficult to store at low temperatures. However, the rootstocks used for watermelon grafting, interspecific squash ( Cucurbita maxima × Cucurbita moschata ) and bottle gourd ( Lagenaria siceraria ) are known to be chilling tolerant. To examine the influence of rootstocks on storability of watermelon seedlings, young seedlings of ‘Tri-X-313’ seedless watermelon grafted onto ‘Strong Tosa’ interspecific squash, ‘Emphasis’ bottle gourd, and ‘Tri-X-313’ watermelon as rootstock were placed for 2 or 4 weeks under 12 °C air temperature and 12 μmol·m −2 ·s −1 photosynthetic photon flux ( PPF ). Nongrafted watermelon seedlings were also treated in these same conditions. In addition, nonstored (grafted and nongrafted) seedlings were prepared for comparison. Regardless of seedling type (nongrafted or grafted with different rootstocks), all seedlings stored for 2 weeks had lower dry weight, comparable or greater number of leaves and stem length, when compared with their respective nonstored control groups after 2 weeks in the greenhouse. Seedlings stored for 4 weeks had lower number of leaves and stem length after 2 weeks in the greenhouse, except for those grafted onto the interspecific squash rootstock. Nongrafted and grafted watermelon seedlings with the same watermelon cultivar as rootstock showed significantly lower leaf net photosynthetic rates after 2 weeks in the greenhouse after the 2-week storage than those of nonstored control groups. In contrast, when grafted onto interspecific squash and bottle gourd rootstocks, seedlings showed comparable net photosynthetic rate to the control group. For all seedling types, 20% to 35% of seedlings died during 4-week storage or poststorage in the greenhouse, whereas all seedlings survived for the 2-week storage, except when grafted onto watermelon as rootstock. Therefore, chilling-tolerant rootstocks ‘Strong Tosa’ interspecific squash and ‘Emphasis’ bottle gourd improved storability of grafted ‘Tri-X-313’ watermelon seedlings but could not extend the storability beyond 2 weeks.
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Claims 11
Claim · model-written summary
After two weeks of storage, all seedling types had lower dry weight than nonstored controls after greenhouse recovery.
- Taxon
- Watermelon
Citrullus lanatust0 - Treatment
- stored for 2 weekse0
- Outcome
- dry weighte0
- Direction
- lowere0
- Comparator
- nonstored control groupse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Regardless of seedling type (nongrafted or grafted with different rootstocks), all seedlings stored for 2 weeks had lower dry weight, comparable or greater number of leaves and stem length, when compared with their respective nonstored control groups after 2 weeks in the greenhouse”
t0“Watermelon Seedlings”
Claim · model-written summary
After two weeks of storage, seedling types had comparable or greater leaf number and stem length than nonstored controls.
- Taxon
- WatermelonCitrullus lanatust0
- Treatment
- stored for 2 weekse0
- Outcome
- number of leaves and stem lengthe0
- Direction
- comparable or greatere0
- Comparator
- nonstored control groupse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Regardless of seedling type (nongrafted or grafted with different rootstocks), all seedlings stored for 2 weeks had lower dry weight, comparable or greater number of leaves and stem length, when compared with their respective nonstored control groups after 2 weeks in the greenhouse”
t0“Watermelon Seedlings”
Claim · model-written summary
Four-week storage reduced leaf number and stem length after recovery except with interspecific squash rootstock.
- Taxon
- WatermelonCitrullus lanatust0
- Treatment
- stored for 4 weekse0
- Outcome
- number of leaves and stem lengthe0
- Direction
- lowere0
- Qualifier
- except for those grafted onto the interspecific squash rootstocke0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seedlings stored for 4 weeks had lower number of leaves and stem length after 2 weeks in the greenhouse, except for those grafted onto the interspecific squash rootstock”
t0“Watermelon Seedlings”
Claim · model-written summary
After two-week storage, nongrafted watermelon had significantly lower leaf net photosynthetic rates than nonstored controls.
- Taxon
- watermelonCitrullus lanatuse0
- Treatment
- 2-week storagee0
- Outcome
- leaf net photosynthetic ratese0
- Direction
- lowere0
- Qualifier
- Nongraftede0
- Comparator
- nonstored control groupse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nongrafted and grafted watermelon seedlings with the same watermelon cultivar as rootstock showed significantly lower leaf net photosynthetic rates after 2 weeks in the greenhouse after the 2-week storage than those of nonstored control groups”
Claim · model-written summary
Watermelon grafted onto its own cultivar had significantly lower leaf net photosynthetic rates after two-week storage than nonstored controls.
- Taxon
- watermelonCitrullus lanatuse0
- Treatment
- 2-week storagee0
- Outcome
- leaf net photosynthetic ratese0
- Direction
- lowere0
- Qualifier
- grafted watermelon seedlings with the same watermelon cultivar as rootstocke0
- Comparator
- nonstored control groupse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nongrafted and grafted watermelon seedlings with the same watermelon cultivar as rootstock showed significantly lower leaf net photosynthetic rates after 2 weeks in the greenhouse after the 2-week storage than those of nonstored control groups”
Claim · model-written summary
Squash-rootstock watermelon retained net photosynthetic rates comparable to nonstored controls after storage.
- Taxon
- WatermelonCitrullus lanatust0
- Treatment
- interspecific squashe0
- Outcome
- net photosynthetic ratee0
- Direction
- comparablee0
- Comparator
- control groupe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“when grafted onto interspecific squash and bottle gourd rootstocks, seedlings showed comparable net photosynthetic rate to the control group”
t0“Watermelon Seedlings”
Claim · model-written summary
Bottle-gourd-rootstock watermelon retained net photosynthetic rates comparable to nonstored controls after storage.
- Taxon
- WatermelonCitrullus lanatust0
- Treatment
- bottle gourd rootstockse0
- Outcome
- net photosynthetic ratee0
- Direction
- comparablee0
- Comparator
- control groupe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“when grafted onto interspecific squash and bottle gourd rootstocks, seedlings showed comparable net photosynthetic rate to the control group”
t0“Watermelon Seedlings”
Claim · model-written summary
Across seedling types, 20% to 35% died during four-week storage or after storage.
- Taxon
- WatermelonCitrullus lanatust0
- Treatment
- 4-week storagee0
- Outcome
- seedlings diede0
- Value
- 20% to 35%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For all seedling types, 20% to 35% of seedlings died during 4-week storage or poststorage in the greenhouse”
t0“Watermelon Seedlings”
Claim · model-written summary
All seedling types survived two-week storage except those grafted onto watermelon rootstock.
- Taxon
- WatermelonCitrullus lanatust0
- Treatment
- 2-week storagee0
- Outcome
- seedlings survivede0
- Qualifier
- except when grafted onto watermelon as rootstocke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“all seedlings survived for the 2-week storage, except when grafted onto watermelon as rootstock”
t0“Watermelon Seedlings”
Claim · model-written summary
Chilling-tolerant squash rootstock improved grafted watermelon storability, but not beyond two weeks.
- Taxon
- watermelonCitrullus lanatuse0
- Material
- ‘Strong Tosa’e0
- Outcome
- storabilitye0
- Direction
- improvede0
- Qualifier
- beyond 2 weekse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“chilling-tolerant rootstocks ‘Strong Tosa’ interspecific squash and ‘Emphasis’ bottle gourd improved storability of grafted ‘Tri-X-313’ watermelon seedlings but could not extend the storability beyond 2 weeks”
Claim · model-written summary
Chilling-tolerant bottle gourd rootstock improved grafted watermelon storability, but not beyond two weeks.
- Taxon
- watermelonCitrullus lanatuse0
- Material
- ‘Emphasis’e0
- Outcome
- storabilitye0
- Direction
- improvede0
- Qualifier
- beyond 2 weekse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“chilling-tolerant rootstocks ‘Strong Tosa’ interspecific squash and ‘Emphasis’ bottle gourd improved storability of grafted ‘Tri-X-313’ watermelon seedlings but could not extend the storability beyond 2 weeks”
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See all 10 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.