Exogenous Applications of Abscisic Acid Improved the Postharvest Drought Tolerance of Several Annual Bedding Plants

Blanchard, Matthew G.; Newton, Linsey; Runkle, Erik S.; Woolard, D.; Campbell, Craig

doi:10.17660/actahortic.2007.755.16

Cited by 26 publications

(34 citation statements)

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“…Under our experimental conditions, s-ABA applications were most effective at delaying wilting symptoms in petunias and least effective in marigolds. Responses to ABA applications have been shown to vary based on the species (Blanchard et al, 2007;Sharma et al, 2006). Blanchard et al (2007) reported that sprench applications of 125 and 250 mgÁL -1 s-ABA were effective in extending the shelf life of New Guinea impatiens (Impatiens hawkeri 'Harmony Grape') for 4.3 to 5.8 d but were not effective in extending the shelf life of impatiens (Impatiens walleriana 'Tempo Lavender') or bacopa (Sutera cordata 'Cabana').…”

Section: Discussionmentioning

confidence: 99%

“…Responses to ABA applications have been shown to vary based on the species (Blanchard et al, 2007;Sharma et al, 2006). Blanchard et al (2007) reported that sprench applications of 125 and 250 mgÁL -1 s-ABA were effective in extending the shelf life of New Guinea impatiens (Impatiens hawkeri 'Harmony Grape') for 4.3 to 5.8 d but were not effective in extending the shelf life of impatiens (Impatiens walleriana 'Tempo Lavender') or bacopa (Sutera cordata 'Cabana'). In all of the species that we evaluated, including impatiens (Impatiens walleriana 'Xtreme Lavender'), both spray and drench s-ABA applications resulted in shelf life extensions in drought-stressed plants.…”

Section: Discussionmentioning

confidence: 99%

“…Recent research has focused on the use of concentrated ABA or ABA analogs as a means of maintaining the marketability of horticulture crops by reducing drought stress symptoms (Blanchard et al, 2007;Kim and van Iersel, 2008;Monteiro et al, 2001;Sharma et al, 2006). ABA analogs have been used to effectively reduce water use and extend the shelf life of tomato (Solanum lycopersicon), snapdragon (Antirrhinum majus), and nasturtium (Tropelaum majus) transplants (Sharma et al, 2006).…”

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“…Mention of a trademark, proprietary product, or vendor does not constitute a guarantee or warranty of the product nor does it imply approval or disapproval to the exclusion of other products or vendors that may also be suitable. seven of nine species of bedding plants that were evaluated (Blanchard et al, 2007). Shelf life extensions for the seven species varied from 1.1 to 5.8 d (Blanchard et al, 2007).…”

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confidence: 99%

“…seven of nine species of bedding plants that were evaluated (Blanchard et al, 2007). Shelf life extensions for the seven species varied from 1.1 to 5.8 d (Blanchard et al, 2007). Overall, exogenous ABA applications have the potential to enhance drought tolerance in plants, but many questions remain about the optimal application methods and effectiveness across different plant species.…”

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Abscisic Acid Application Enhances Drought Stress Tolerance in Bedding Plants

Waterland¹,

Campbell²,

Finer³

et al. 2010

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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 (ConTegoä; 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 mgÁL -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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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Abscisic Acid Application Enhances Drought Stress Tolerance in Bedding Plants

Waterland¹,

Campbell²,

Finer³

et al. 2010

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Postharvest Biology and Technology of Cut Flowers and Potted Plants

Reid¹,

Jiang²

2012

Horticultural Reviews

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The relatively brief postharvest life of most cut flowers and potted flowering plants can be extended by a range of technologies. Studies have shown that vase life is negatively correlated with respiration after harvest, so prompt cooling to the lowest safe storage temperature is a key to long-distance transport of these perishable crops. Forced air cooling is the method of choice for cut flowers, and vacuum cooling has been shown to be very effective for cooling potted plants. In contrast to some other horticultural crops, controlled and modified atmospheres seem to have little effect on petal respiration, and these techniques have not proved commercially useful in the marketing of many cut flowers. Low temperatures are also important in managing the effect of other factors contributing to early senescence, including water loss, the effects of ethylene, leaf yellowing, and the growth of diseases, particularly caused by Botrytis cinerea. Ornamentals originating in the tropics and subtropics cannot be cooled below 10 C because they rapidly show the symptoms of chilling injury. Chemical strategies to improve the life of ornamentals include the application of abscisic acid to reduce water loss, particularly in potted and bedding plants, pretreatment with the volatile ethylene inhibitor 1-methylcyclopropene (1-MCP) to prevent the 1

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