Significance of Growth‐Inhibiting Substances and Auxins for the Rest‐Period of the Potato Tuber

Hemberg, Torsten

doi:10.1111/j.1399-3054.1949.tb07645.x

Cited by 96 publications

(22 citation statements)

References 5 publications

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“…Inconsistent data have been also published concerning changes in endogenous levels of IAA. Bioassay and HPLC-derived data suggested an increase of IAA levels after bud break (Hemberg 1949;Sukhova et al 1993), indicating no direct role for auxin in dormancy control. Later, Sorce et al (2000) found a positive correlation between IAA content in tuber buds and loss of dormancy.…”

Section: Hormonal Controlmentioning

confidence: 99%

“…The significance of ABA as dormancy-related hormone was first recognised by Hemberg (1949). At this time, ABA was named beta-inhibitor complex.…”

Section: Hormonal Controlmentioning

confidence: 99%

“…Exogenous application of high concentrations of indole-3 acetic acid (IAA) or 1-naphthaleneacetic acid resulted in an inhibition of sprout growth, while application of low doses of auxin to bud containing tuber slices had a growth stimulating effect (Hemberg 1949(Hemberg , 1985Suttle 2007). Inconsistent data have been also published concerning changes in endogenous levels of IAA.…”

Section: Hormonal Controlmentioning

confidence: 99%

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Regulation of potato tuber sprouting

Sonnewald

2013

Planta

212

165

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Section: Hormonal Controlmentioning

confidence: 99%

“…The significance of ABA as dormancy-related hormone was first recognised by Hemberg (1949). At this time, ABA was named beta-inhibitor complex.…”

Section: Hormonal Controlmentioning

confidence: 99%

Section: Hormonal Controlmentioning

confidence: 99%

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Regulation of potato tuber sprouting

Sonnewald

2013

Planta

212

165

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“…While the role of ethylene in potato tuber dormancy is still obscure (Suttle, 2004a), the significance of ABA in regulating this process was first recognized by Hemberg (1949), while it was still known as b-inhibitor complex. Analyzing the ABA content of different potato varieties revealed a continuous decline in ABA during storage, but there was no correlation between the absolute ABA levels and the sprouting behavior of different potato varieties (Suttle and Hultstrand, 1994;Suttle, 1995;Biemelt et al, 2000).…”

mentioning

confidence: 99%

Reactivation of Meristem Activity and Sprout Growth in Potato Tubers Require Both Cytokinin and Gibberellin

et al. 2010

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Reactivation of dormant meristems is of central importance for plant fitness and survival. Due to their large meristem size, potato (Solanum tuberosum) tubers serve as a model system to study the underlying molecular processes. The phytohormones cytokinins (CK) and gibberellins (GA) play important roles in releasing potato tuber dormancy and promoting sprouting, but their mode of action in these processes is still obscure. Here, we established an in vitro assay using excised tuber buds to study the dormancy-releasing capacity of GA and CK and show that application of gibberellic acid (GA 3 ) is sufficient to induce sprouting. In contrast, treatment with 6-benzylaminopurine induced bud break but did not support further sprout growth unless GA 3 was administered additionally. Transgenic potato plants expressing Arabidopsis (Arabidopsis thaliana) GA 20-oxidase or GA 2-oxidase to modify endogenous GA levels showed the expected phenotypical changes as well as slight effects on tuber sprouting. The isopentenyltransferase (IPT) from Agrobacterium tumefaciens and the Arabidopsis cytokinin oxidase/dehydrogenase1 (CKX) were exploited to modify the amounts of CK in transgenic potato plants. IPT expression promoted earlier sprouting in vitro. Strikingly, CKX-expressing tubers exhibited a prolonged dormancy period and did not respond to GA 3 . This supports an essential role of CK in terminating tuber dormancy and indicates that GA is not sufficient to break dormancy in the absence of CK. GA 3 -treated wild-type and CKX-expressing tuber buds were subjected to a transcriptome analysis that revealed transcriptional changes in several functional groups, including cell wall metabolism, cell cycle, and auxin and ethylene signaling, denoting events associated with the reactivation of dormant meristems.

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“…At that time, the air-stored cabbage had passed through dormancy (Wareing 1969;Wareing and Saunders 1971) (Hemberg 1949; Smith and Rappaport 1961) and onions (Isenberg et al 1974b;Thomas 1969) Aung and Peterson (1974) (Fig. 2a) …”

mentioning

confidence: 99%

Ethylene-Induced Changes in Appearance and Hormone Content of Florida Grown Cabbage

Pendergrass¹,

Isenberg²,

Howell³

et al. 1976

Can. J. Plant Sci.

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Cabbage (Brassica oleracea L. capitata), freshly harvested and market-trimmed in Florida, was stored for 5 wk at 1 C ± 0.5 C in air containing 0.04, 1, 10 and 100 ppm ethylene. At the highest two ethylene concentrations, market quality was reduced due to loss of external green color and extensive leaf abscission. Similar external changes were seen in cabbage reported to have been stored with apples. Hormonal changes associated with these high ethylene concentrations were disappearance of an abscisic acid-type inhibitor and accumulation of auxins at the apical region.

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Significance of Growth‐Inhibiting Substances and Auxins for the Rest‐Period of the Potato Tuber

Cited by 96 publications

References 5 publications

Regulation of potato tuber sprouting

Regulation of potato tuber sprouting

Reactivation of Meristem Activity and Sprout Growth in Potato Tubers Require Both Cytokinin and Gibberellin

Ethylene-Induced Changes in Appearance and Hormone Content of Florida Grown Cabbage

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