Effect of Ethylene on the Endogenous Cytokinin and Gibberellin Levels in Tuberizing Potatoes

Dimalla, G.G.; Staden, J. Van

doi:10.1104/pp.60.2.218

Cited by 15 publications

(2 citation statements)

References 14 publications

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“…[14,15] . Dimalla and Van Staden [5] reported that ethylene prevented 'little-tuber disorder', i.e ., the formation of small tubers on aged mother tubers . Palmer and Barker [17] and Koda and Okazawa [10] noticed diageotropic growth of shoots after treatment with ethylene in vitro, but they found no effect on tuberization .…”

Section: Introductionmentioning

confidence: 99%

Effects of ethylene on the tuberization of potato (Solanum tuberosum) cuttings

Vreugdenhil¹,

Dijk²

1989

Plant Growth Regul

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Ethylene, applied as ethephon, inhibited the elongation of etiolated, axillary potato shoots cultured in vitro and it stimulated radial growth along the whole length of these shoots . The same phenomena were observed when ACC, the precursor of ethylene, was added to the medium, whereas silver ions reversed these effects . However, tuber formation in vitro was suppressed by ethephon. This indicates a dual role of ethylene in the induction of tuber formation in potatoes : it had a positive effect by blocking the elongation of stolons and it suppressed tuber initiation .

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Section: Introductionmentioning

confidence: 99%

Effects of ethylene on the tuberization of potato (Solanum tuberosum) cuttings

Vreugdenhil¹,

Dijk²

1989

Plant Growth Regul

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“…Tissue sensitivity to cytokinins is important for the regulation of dormancy, as an increase in both cytokinin content and sensitivity appear to be the principal factors leading to the loss of dormancy (Turnbull and Hanke, 1985;Suttle, 2004b). Cessation of meristematic activity in potato stolon apex during tuberization has been reported (Burton, 1989) and this can be orchestrated by ethylene inhibition of the action of cytokinins (Dimalla and van Staden, 1977). It is therefore possible that exogenous Changes in the level of the plant growth regulator abscisic acid (ABA) in sweetpotato in relation to the dormancy mechanism has not been reported previously.…”

Section: Hormonal Changes and Sprout Growthmentioning

confidence: 99%

The timing of exogenous ethylene supplementation differentially affects stored sweetpotato roots

Amoah

Landahl

Terry

2016

Postharvest Biology and Technology

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The effects of continuous supplemental ethylene (10 μL L-1) timing on the physiology and biochemistry of sweetpotato roots during storage at 25 o C were examined. Alongside continuous ethylene or air treatments, a subset of the roots were transferred at dormancy break, from those previously stored in ethylene into air and vice-versa. The study showed distinctive ethylene-induced effects on the metabolism of individual sugars, phenolic compounds and phytohormones (abscisic acid and zeatin riboside) across the spatial gradient of the root flesh and skin tissues. Although ethylene fumigation doubled root respiration, sprout growth was significantly suppressed. Supplementation of roots with ethylene after dormancy break effectively inhibited sprout growth as much as continuous ethylene alone. On the other hand, truncating ethylene application after dormancy release promoted vigorous sprout growth. After prolonged storage, ethylene treatment was associated with increased weight loss and incidence of proximal rots. Supplemental ethylene also accelerated the catabolism of monosaccharides, and promoted accumulation of phenolic compounds in the proximal root sections.

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