Senescence in Isolated Carnation Petals: Differential Response of Various Petal Portions to ACC, and Effects of Uptake of Exudate From Excised Gynoecia

Sacalis, John N.; Wulster, George J.; Janes, Harry W.

doi:10.1016/s0044-328x(83)80057-9

Cited by 14 publications

(5 citation statements)

References 15 publications

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“…7). Similar results have been found recently by Sacalis et al (1983). It seems, therefore, that both ACC-synthase and EFE contributed to the difference in ethylene production between the two petal portions.…”

Section: Disctissionsupporting

confidence: 91%

See 1 more Smart Citation

The site of 1‐aminocyclopropane‐1‐carboxylic acid synthesis in senescing carnation petals

Mor

Halevy

Spiegelstein

et al. 1985

Physiologia Plantarum

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Spiegelstein, H, and Mayak, S. 1985, The site of 1-amitiocy-cIopropane-1-carbosylic acid syntbesis in senescing carnation petals, -Physiol, Plant. 65;[196][197][198][199][200][201][202] To study the cause of the uneven production of ethyiene by upper and basal portions of detached petals of carnation (Dianthus caryophyllus L, cv. White Sim), the petals were divided and exposed to ethylene (30 (il 1^' for 16 h). The treatment induced rapid wilting and autocatalytic ethylene production in the basai portion similar to that induced in entire petals. In contrast to the response in entire petals and the basal portions, the upper portions responded to ethylene by delayed wilting and much lower ethylene production, Aminocyclopropane carboxylic acid (ACC)-synthase activity in the basal portion of the petals was 38 to 400 times that in the upper portion. In yntreated detached petal pieces from senescing carnation flowers, etbylene production by tbe upper portion declined after 6 h while the basal portion was still producing ethylene at a steady rate 18 h later. Application of ACC to the upper portion of senescing petals increased their ethylene production, a-Aminooxyacetic acid (0,5 mM), reduced tbe ethylene production of the senescing basai portion more than that of the upper portion. Endogenous ACC eontent in basal portions of senescing carnation petals was 3 to 4 times higher than in the upper parts. When detached senescing petals were divided immediately after detaching, the endogenous ACC ieveis in upper portions remained steady or declined during 24 h after division, while in the basal portions the ACC level rose steadily as in the intact petals. There was no change in the conjugated ACC in either portioti after 24 b, Benzyladenine (BA) applied as a pretreatment to entire preclimacteric petals greatly reduced the development of ACCsynthase activity of the basal portion, but had little effect on tbe activity in the upper portioti of the petal. In both portions, however, BA effectively reduced the conversion of ACC to ethylene.Additional key words -Aminooxyacetie acid, benzyladenine, conjugated ACC, Dianthus caryophyllus, ethyiene forming enzyme, flower senescence, Y. Mor, A. H. Halevy (reprint requests), H. Spiegelstein .and S. Mayak,

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Section: Disctissionsupporting

confidence: 91%

“…The reduction in ethylene production by basal portions of the petals (Tab. 3) was rather a result of a diminishing activity of EFE (Sacalis et al 1983). Application of the ACC-synthase inhibitor AOA (Yu et al 1979) greatly reduced ethyiene production in senescing basal portions of petals (Fig.…”

Section: Disctissionmentioning

confidence: 98%

The site of 1‐aminocyclopropane‐1‐carboxylic acid synthesis in senescing carnation petals

Mor

Halevy

Spiegelstein

et al. 1985

Physiologia Plantarum

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“…Early evidence for such a secondary pollination signal came from surgical experiments demonstrating that a mobile wilting factor is transmitted through the style to the corolla of Petunia flowers within 6 h after pollination (42). Stylar exudates also promote perianth senescence in Petunia and carnation, implicating the role of a chemical messenger either produced in the style or translocated through it (42,132). Because auxin, ethylene, and ACC have been implicated in primary pollen signaling, these same molecules have been extensively evaluated as potential transmissible signals in pollinated flowers.…”

Section: Secondary Pollination Signalsmentioning

confidence: 99%

Pollination Regulation of Flower Development

O’Neill

1997

Annu. Rev. Plant. Physiol. Plant. Mol. Biol.

211

137

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Pollination regulates a syndrome of developmental responses that contributes to successful sexual reproduction in higher plants. Pollination-regulated developmental events collectively prepare the flower for fertilization and embryogenesis while bringing about the loss of floral organs that have completed their function in pollen dispersal and reception. Components of this process include changes in flower pigmentation, senescence and abscission of floral organs, growth and development of the ovary, and, in certain cases, pollination also triggers ovule and female gametophyte development in anticipation of fertilization. Pollination-regulated development is initiated by the primary pollination event at the stigma surface, but because developmental processes occur in distal floral organs, the activity of interorgan signals that amplify and transmit the primary pollination signal to floral organs is implicated. Interorgan signaling and signal amplification involves the regulation of ethylene biosynthetic gene expression and interorgan transport of hormones and their precursors. The coordination of pollination- regulated flower development including gametophyte, embryo, and ovary development; pollination signaling; the molecular regulation of ethylene biosynthesis; and interorgan communication are presented.

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“…1980). Interestingly, Sacalis et al (1983) reported that exudates from 6 day old carnation gynoecia were capable of inducing senescence of excised petals. In contrast, the exudates from young carnation gynoecia did not induce petal senescence.…”

Section: Interaction Of Petals With Other Flower Partsmentioning

confidence: 99%