Abstract
The ethylene inhibitor 1-methylcyclopropene (1-MCP) is commonly used to increase the shelf life of fruits. However, the application of 1-MCP to modulate the shoot growth of vegetable transplants is unknown. The objective of this study was to assess the influence of 1-MCP on improving the growth and quality of tomato transplants. Eight tomato cultivars ('Florida 47', 'Shanty', 'Volante', 'Tycoon', 'TAMU-Hot', 'Felicity', 'Charger', and 'BHN685') were grown in greenhouse conditions for seven weeks and then 1-MCP (50 mg L-1) was applied to transplants using a boom fertigation system. After treatments, both the 1-MCP and untreated plants were transferred to 0.5-L pots and placed in three growth chamber environments differing in day/night temperature regimes, 30/20°C (optimum), 34/24°C constant (stress) and 34/24°C ramping (stress). The plant morphology and physiology variables were collected during the study period. 1-MCP application significantly increased the leaf area, stem diameter and plant height of 'Florida 47' across all temperature regimes. 'TAMU-Hot', which was grown only in the 34/24 environment (ramping) also positively responded to 1-MCP. However, the leaf gas exchange (photosynthetic rate and stomatal conductance) and SPAD measurements were inconsistent across cultivars. 1-MCP had no negative effect on the transplant growth across all cultivars in the 30/20 environment but reduced growth components in Felicity and Tycoon in the 34/24 environment. Our results showed that the application of 1-MCP to improve the transplant quality is promising. Since genetics and environment may influence the sensitivity of tomato plants to 1-MCP, future studies should aim to identify the optimal microclimate growth conditions for specific cultivars.
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Claims 8
Claim · model-written summary
1-MCP increased leaf area, stem diameter and plant height of Florida 47 across temperature regimes.
- Taxon
- tomato
Solanum lycopersicume1 - Material
- Florida 47e0
- Treatment
- 1-MCPe0
- Outcome
- leaf area, stem diameter and plant heighte0
- Direction
- increasede0
- Qualifier
- across all temperature regimese0
- Comparator
- untreated plantse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“1-MCP application significantly increased the leaf area, stem diameter and plant height of 'Florida 47' across all temperature regimes.”
e1“tomato transplants”
e2“both the 1-MCP and untreated plants”
Claim · model-written summary
TAMU-Hot responded positively to 1-MCP under ramping 34/24 conditions.
- Taxon
- tomatoSolanum lycopersicume1
- Material
- TAMU-Hote0
- Treatment
- 1-MCPe0
- Outcome
- positively respondede0
- Direction
- positively respondede0
- Comparator
- untreated plantse2
- Setting
- 34/24 environment (ramping)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“'TAMU-Hot', which was grown only in the 34/24 environment (ramping) also positively responded to 1-MCP.”
e1“tomato transplants”
e2“both the 1-MCP and untreated plants”
Claim · model-written summary
Gas exchange and SPAD responses to 1-MCP varied across cultivars.
- Taxon
- tomatoSolanum lycopersicume1
- Outcome
- leaf gas exchange (photosynthetic rate and stomatal conductance) and SPAD measurementse0
- Qualifier
- inconsistent across cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the leaf gas exchange (photosynthetic rate and stomatal conductance) and SPAD measurements were inconsistent across cultivars.”
e1“tomato transplants”
Claim · model-written summary
1-MCP had no negative effect on transplant growth across cultivars at 30/20.
- Taxon
- tomatoSolanum lycopersicume1
- Treatment
- 1-MCPe0
- Outcome
- transplant growthe0
- Direction
- no negative effecte0
- Comparator
- untreated plantse2
- Setting
- 30/20 environmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“1-MCP had no negative effect on the transplant growth across all cultivars in the 30/20 environment”
e1“tomato transplants”
e2“both the 1-MCP and untreated plants”
Claim · model-written summary
1-MCP reduced growth components in Felicity at 34/24.
- Taxon
- tomatoSolanum lycopersicume2
- Material
- Felicitye0
- Treatment
- 1-MCPe1
- Outcome
- growth componentse0
- Direction
- reducede0
- Comparator
- untreated plantse3
- Setting
- 34/24 environmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“reduced growth components in Felicity and Tycoon in the 34/24 environment.”
e1“1-MCP had no negative effect”
e2“tomato transplants”
e3“untreated plants”
Claim · model-written summary
1-MCP reduced growth components in Tycoon at 34/24.
- Taxon
- tomatoSolanum lycopersicume2
- Material
- Tycoone0
- Treatment
- 1-MCPe1
- Outcome
- growth componentse0
- Direction
- reducede0
- Comparator
- untreated plantse3
- Setting
- 34/24 environmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“reduced growth components in Felicity and Tycoon in the 34/24 environment.”
e1“1-MCP had no negative effect”
e2“tomato transplants”
e3“untreated plants”
Claim · model-written summary
The authors consider 1-MCP promising for improving transplant quality.
- Taxon
- tomatoSolanum lycopersicume1
- Outcome
- application of 1-MCP to improve the transplant qualitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Our results showed that the application of 1-MCP to improve the transplant quality is promising.”
e1“tomato plants”
Claim · model-written summary
The authors recommend finding cultivar-specific optimal microclimate conditions.
- Taxon
- tomatoSolanum lycopersicume1
- Outcome
- identify the optimal microclimate growth conditions for specific cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“future studies should aim to identify the optimal microclimate growth conditions for specific cultivars.”
e1“tomato plants”
The same questions in other papers
1-methylcyclopropene · growth · Solanum lycopersicum (tomato)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.