Identification and Concentration of Endogenous Cytokinins in Carrots (Daucus carota L.) as Influenced by Development and a Circadian Rhythm

Stiebeling, B.; Neumann, K.–H.

doi:10.1016/s0176-1617(87)80045-7

Cited by 18 publications

(4 citation statements)

References 8 publications

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“…The diameter of carrot roots is positively related to the level of CK. The concentration of endogenous CK was found to have a circadian rhythm 143 . In Chen et al, cambium tissues were found to be the cytokinin biosynthetic site in carrots.…”

Section: Hormone Regulationmentioning

confidence: 99%

Advances in research on the carrot, an important root vegetable in the Apiaceae family

et al. 2019

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Carrots ( Daucus carota L.), among the most important root vegetables in the Apiaceae family, are cultivated worldwide. The storage root is widely utilized due to its richness in carotenoids, anthocyanins, dietary fiber, vitamins and other nutrients. Carrot extracts, which serve as sources of antioxidants, have important functions in preventing many diseases. The biosynthesis, metabolism, and medicinal properties of carotenoids in carrots have been widely studied. Research on hormone regulation in the growth and development of carrots has also been widely performed. Recently, with the development of high-throughput sequencing technology, many efficient tools have been adopted in carrot research. A large amount of sequence data has been produced and applied to improve carrot breeding. A genome editing system based on CRISPR/Cas9 was also constructed for carrot research. In this review, we will briefly summarize the origins, genetic breeding, resistance breeding, genome editing, omics research, hormone regulation, and nutritional composition of carrots. Perspectives about future research work on carrots are also briefly provided.

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Section: Hormone Regulationmentioning

confidence: 99%

Advances in research on the carrot, an important root vegetable in the Apiaceae family

et al. 2019

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“…There is some circumstantial evidence that other hormones may be involved in regulating circadian output. In carrot ( Daucus carota ), the levels of cytokinins (CKs) are under circadian control [99]. While in tobacco, CKs, as well as IAA and abscisic acid, are rhythmic under diurnal condition [100].…”

Section: Mechanisms For Regulating Outputmentioning

confidence: 99%

Regulation of output from the plant circadian clock

Yakir¹,

Hilman²,

Harir³

et al. 2006

The FEBS Journal

152

129

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Plants, like many other organisms, have endogenous biological clocks that enable them to organize their physiological, metabolic and developmental processes so that they occur at optimal times. The best studied of these biological clocks are the circadian systems that regulate daily (∼ 24 h) rhythms. At the core of the circadian system in every organism are oscillators responsible for generating circadian rhythms. These oscillators can be entrained (set) by cues from the environment, such as daily changes in light and temperature. Completing the circadian clock model are the output pathways that provide a link between the oscillator and the various biological processes whose rhythms it controls. Over the past few years there has been a tremendous increase in our understanding of the mechanisms of the oscillator and entrainment pathways in plants and many useful reviews on the subject. In this review we focus on the output pathways by which the oscillator regulates rhythmic plant processes. In the first part of the review we describe the role of the circadian system in regulation at all stages of a plant's development, from germination and growth to reproductive development as well as in multiple cellular processes. Indeed, the importance of a circadian clock for plants can be gauged by the fact that so many facets of plant development are under its control. In the second part of the review we describe what is known about the mechanisms by which the circadian system regulates these output processes.

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“…The competent cells of juvenile quinoa calluses seem to be induced to form somatic embryo during culture in the medium with 2,4-D D and had to be stimulated to the formation of somatic embryos in a suitable auxinfree nutrient medium. It is known from earlier investigations that cultured cells develop an endogenous hormonal system different from that of the original explants (Neumann and Bender, 1987;Stiebeling and Neumann, 1987). As an example the concentrations of some endogenous phytohormones in cultured carrot petioles at several stages during induction of somatic embryogenesis were determined by Grieb et al (1997).…”

mentioning

confidence: 99%

Induction of somatic embryogenesis in cultured cells of Chenopodium quinoa

Eisa

Koyro

Kögel

et al. 2005

Plant Cell Tiss Organ Cult

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A major limiting factor for quinoa cultivation as a grain crop on a large scale are virus diseases, in particularly seed borne diseases. Therefore, a somatic embryogenesis protocol is a necessary tool to produce virus free plants. Somatic embryogenesis offers the possibility of mass production of transgenic plants and therefore can be used easily to study the effect on plants resulting from breeding processes. An in vitro protocol has been developed for somatic embryogensis from calluses and cell cultures of Chenopodium quinoa. Callus was induced from hypocotyl explants within 2 weeks of culture on a modified Murashige and Skoog (MS) medium supplemented with 0.45 lM 2,4-D D . Calluses were cultured on solid or liquid MS medium and later the development of somatic embryos was observed on both employing the same MS medium without 2,4-D D . To our knowledge this is the first report of somatic embryogenesis in Chenopodium quinoa.

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Identification and Concentration of Endogenous Cytokinins in Carrots (Daucus carota L.) as Influenced by Development and a Circadian Rhythm

Cited by 18 publications

References 8 publications

Advances in research on the carrot, an important root vegetable in the Apiaceae family

Advances in research on the carrot, an important root vegetable in the Apiaceae family

Regulation of output from the plant circadian clock

Induction of somatic embryogenesis in cultured cells of Chenopodium quinoa

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