Potato Tuberization: Evidence for a SD-Dependent and a Gibberellin-Dependent Pathway of Induction

Bou, Jordi; Virgós, Ariadna; Martínez‐Garcia, Jaime F.; Prat, Salomé

doi:10.1007/978-94-017-2664-1_6

Cited by 2 publications

(2 citation statements)

References 20 publications

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“…Increased levels of both GA activity and phytochrome B content in the leaves of transformants are a probable cause of enhanced LD effect on tuber formation by these plants. On the other hand, taking into account a small range of differences in GA activity between genotypes, especially in underground organs, it seems likely that another phytochrome-dependent but GA-independent way occurs for suppression of tuberization [11,12].…”

Section: Discussionmentioning

confidence: 97%

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Photoperiodic and Hormonal Control of Tuberization in Potato Plants Transformed with the PHYB Gene from Arabidopsis

Aksenova

Konstantinova

Lozhnikova

et al. 2005

Russ J Plant Physiol

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We studied photoperiodic and hormonal regulation of tuberization in wild-type potato ( Solanum tuberosum L., cv, Désirée) plants and derivative transgenic plants harboring the PHYB gene from Arabidopsis , which encodes the phytochrome B apoprotein, under the control of the cauliflower mosaic virus 35S promoter. Plants were cultured on hormone-free Murashige and Skoog nutrient medium containing 5% sucrose or on the same medium supplemented with 1 mg/l kinetin under conditions of long day (LD, 16 h), short day (SD, 10 h), or SD with interrupted long night. We estimated cytokinins (zeatin and zeatin riboside) in underground and aboveground plant organs by the ELISA technique and GA activity in a bioassay with dwarf pea seedlings. Under LD conditions, transgenic plants produced substantially less tubers than wild-type plants. Kinetin addition to the culturing medium resulted in stimulation of tuberization under LD conditions, especially pronounced in the PHYB plants. The content of cytokinins and the activity of GA were much higher under LD conditions, especially in leaves. The total level of both phytohormones was higher in transformed as compared to wild-type plants. A relation of phytochrome-dependent tuberization to the hormonal status of underground and aboveground plant organs and possible reasons for kinetin stimulatory effect on this process are discussed.

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Section: Discussionmentioning

confidence: 97%

“…It was also demonstrated that various gibberellins exerted different, sometimes opposite, effects on tuberization [12].…”

Section: Photoperiodic and Hormonal Control Of Tuberization In Potatomentioning

confidence: 98%

Photoperiodic and Hormonal Control of Tuberization in Potato Plants Transformed with the PHYB Gene from Arabidopsis

Aksenova

Konstantinova

Lozhnikova

et al. 2005

Russ J Plant Physiol

View full text Add to dashboard Cite

show abstract

Interaction between day length and phytohormones in the control of potato tuberization in the in vitro culture

Aksenova

Konstantinova

Lozhnikova

et al. 2009

Russ J Plant Physiol

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Potato Tuberization: Evidence for a SD-Dependent and a Gibberellin-Dependent Pathway of Induction

Cited by 2 publications

References 20 publications

Photoperiodic and Hormonal Control of Tuberization in Potato Plants Transformed with the PHYB Gene from Arabidopsis

Photoperiodic and Hormonal Control of Tuberization in Potato Plants Transformed with the PHYB Gene from Arabidopsis

Interaction between day length and phytohormones in the control of potato tuberization in the in vitro culture

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