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Ethylene-sensitivity regulates proteolytic activity and cysteine protease gene expression in petunia corollas.
- Michelle L Jones, G. Chaffin, J. R. Eason, D. Clark
- Biology, MedicineJournal of experimental botany
- 1 October 2005
The delay in visible symptoms and biochemical and molecular indicators of senescence in ethylene-insensitive flowers is consistent with the concept that ethylene modulates the timing of senescing pathways in petals.
Overproduction of Cytokinins in Petunia Flowers Transformed with PSAG12-IPT Delays Corolla Senescence and Decreases Sensitivity to Ethylene1
- Hsiang-lin Chang, Michelle L Jones, G. Banowetz, D. Clark
- Biology, MedicinePlant Physiology
- 1 August 2003
Understanding of the hormone interactions that regulate flower senescence is extended and PSAG12-IPT plants provide a means of increasing flower longevity.
Ethylene-regulated expression of a carnation cysteine proteinase during flower petal senescence
RNA gel blot analysis revealed that the expression of pDCCP1 increased substantially with the onset of ethylene production and senescence of petals, suggesting a role for cysteine proteinase in the loss of protein during floralsenescence.
Drought-induced Leaf Senescence and Horticultural Performance of Transgenic PSAG12-IPT Petunias
The results demonstrate that it is possible to use PSAG12-IPT to produce transgenic plants with delayed leaf senescence but differences in plant morphology between transgenic lines exist, which may alter horticultural performance characteristics.
Down-Regulating α-Galactosidase Enhances Freezing Tolerance in Transgenic Petunia1
Down-regulating α-Gal in petunia results in an increase in freezing tolerance at the whole-plant level in nonacclimated and cold-acclimating plants, whereas overexpression of theα-Gal gene caused a decrease in endogenous raffinose and impaired freezing tolerance, suggesting that engineering raff inose metabolism by transformation with α- Gal provides an additional method for improving the freezing tolerance of plants.
Increases in DNA fragmentation and induction of a senescence-specific nuclease are delayed during corolla senescence in ethylene-insensitive (etr1-1) transgenic petunias.
Delayed increases in PhNUC1 activity observed in ethylene-insensitive flowers (35S:etr1-1) suggest that ethylene modulates the timing of PhN UC1 induction, but that it is not an absolute requirement for its activation.
Ethylene biosynthetic genes are differentially regulated by ethylene and ACC in carnation styles
- Michelle L Jones
- BiologyPlant Growth Regulation
- 1 June 2003
Results confirm that ethylene is the primary regulator of ACS and ACO gene expression in petals and show large increases in ethylene evolution from the style.
Ethylene regulates phosphorus remobilization and expression of a phosphate transporter (PhPT1) during petunia corolla senescence
The programmed degradation of macromolecules during petal senescence allows the plant to remobilize nutrients from dying to developing tissues. Ethylene is involved in regulating the timing of…
Benzyladenine and Gibberellic Acid Application Prevents Abscisic Acid-induced Leaf Chlorosis in Pansy and Viola
The application of s-ABA and BA + GA4+7 would allow floriculture crops to tolerate temporary periods of drought stress without any loss of postproduction quality.
Role of Ethylene and 1-MCP in Flower Development and Petal Abscission in Zonal Geraniums
Additional index words. petal shattering, flower senescence, ethephon, Pelargonium × hortorum Abstract. Geraniums are sensitive to ethylene during shipping and respond by abscising their petals.…