Abstract
Drought stress is a major cause of postproduction decline in bedding plants. The plant hormone abscisic acid (ABA) regulates drought stress responses by mediating stomatal closure, thereby reducing transpirational water loss. Exogenous ABA applications delay wilting and allow plants to survive short periods of severe drought. The effectiveness of the ABA biochemical, s-ABA (ConTego™; Valent BioSciences Corp., Libertyville, IL), at delaying wilting and extending shelf life during drought stress was evaluated in six bedding plant species. Spray and drench applications of 0 or 500 mg·L −1 s-ABA were applied to Impatiens walleriana (impatiens), Pelargonium × hortorum (seed geranium ) , Petunia × hybrida (petunia), Tagetes patula (marigold), Salvia splendens (salvia), and Viola × wittrockiana (pansy). Water was subsequently withheld and wilting symptoms were compared between treated and control plants. s-ABA applications delayed wilting in all crops by 1.7 to 4.3 days. Leaf chlorosis was observed after s-ABA application in drought-stressed seed geraniums, marigolds, and pansies. In seed geraniums and marigolds, the drought stress itself resulted in leaf chlorosis that was equivalent to or more severe than the s-ABA application alone. In pansies, s-ABA applications induced leaf chlorosis that was more severe than the drought treatment. Overall, s-ABA was consistently effective at reducing water loss and extending shelf life for all species treated. Applications of s-ABA to bedding plants before shipping and retailing would allow plants to maintain marketability even under severe drought stress conditions.
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Claims 7
Claim · model-written summary
s-ABA delayed wilting in all six bedding plant crops by 1.7 to 4.3 days.
Verbatim
e0“s-ABA applications delayed wilting in all crops by 1.7 to 4.3 days.”
e1“Water was subsequently withheld and wilting symptoms were compared between treated and control plants.”
t0“Bedding Plants”
Claim · model-written summary
s-ABA application caused leaf chlorosis in drought-stressed seed geraniums, marigolds and pansies.
- Taxon
- seed geraniums, marigolds, and pansiese0
- Treatment
- s-ABA applicatione0
- Outcome
- Leaf chlorosise0
- Comparator
- control plantse1
Not reportedDirection
Verbatim
e0“Leaf chlorosis was observed after s-ABA application in drought-stressed seed geraniums, marigolds, and pansies.”
e1“wilting symptoms were compared between treated and control plants”
Claim · model-written summary
Drought alone caused leaf chlorosis in seed geraniums and marigolds at least as severe as s-ABA alone.
Verbatim
e0“In seed geraniums and marigolds, the drought stress itself resulted in leaf chlorosis that was equivalent to or more severe than the s-ABA application alone.”
Claim · model-written summary
In pansies, s-ABA caused more severe leaf chlorosis than drought treatment.
- Taxon
- pansies
Viola ×wittrockianae0 - Treatment
- s-ABA applicationse0
- Outcome
- leaf chlorosise0
- Direction
- more severee0
- Comparator
- drought treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In pansies, s-ABA applications induced leaf chlorosis that was more severe than the drought treatment.”
Claim · model-written summary
s-ABA reduced water loss in all treated species.
Verbatim
e0“s-ABA was consistently effective at reducing water loss and extending shelf life for all species treated.”
e1“treated and control plants”
t0“Bedding Plants”
Claim · model-written summary
s-ABA extended shelf life in all treated species.
Verbatim
e0“s-ABA was consistently effective at reducing water loss and extending shelf life for all species treated.”
e1“treated and control plants”
t0“Bedding Plants”
Claim · model-written summary
The authors recommend s-ABA before shipping and retailing to maintain marketability during severe drought.
Verbatim
e0“Applications of s-ABA to bedding plants before shipping and retailing would allow plants to maintain marketability even under severe drought stress conditions.”
The same questions in other papers
drought · physiology: pigments · GeraniumResults agree
1 paper in the same direction as this paper
- negative
drought · physiology: pigments · Tagetes (marigolds)Results agree
2 papers in the same direction as this paper
- negative
- negative
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.