Melatonin and serotonin profiles in beans of <i>Coffea</i> species

Ramakrishna, A; Giridhar, P.; Sankar, K. Udaya; Ravishankar, G. A.

doi:10.1111/j.1600-079x.2011.00964.x

Cited by 121 publications

(71 citation statements)

References 49 publications

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“…Recently, we have reported the morphogenetic potential of indoleamines with reference to in vitro shoot multiplication in Mimosa pudica L ( Ramakrishna et al 2009). The endogenous profiles of both SER and MEL by HPLC and LCMS in coffee beans (Ramakrishna et al 2011b) and different tissues of C. canephora have also been reported by us (Ramakrishna et al 2011c). Attempts have been made to identify the changes in endogenous indoleamine pools under the influence of a growth regulator-thidiazuron (TDZ) in tissues of Echinacea purpurea L (Jones et al 2007) and similar effects of MEL in Brassica juncea (Chen et al 2009).…”

Section: Introductionmentioning

confidence: 75%

Indoleamines and calcium enhance somatic embryogenesis in Coffea canephora P ex Fr

Ramakrishna

Giridhar

Jobin

et al. 2011

Plant Cell Tiss Organ Cult

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Melatonin (MEL) and serotonin (SER) are important indoleamines that are involved in neural transmission in mammalian cells. They are also known to be present in various genera of plants. The role (s) of these indoleamines in plants are not well known. In this study, the effects of SER, MEL, calcium, and calcium ionophore (A23187), a calcium channel activator, on somatic embryogenesis in Coffea canephora have been investigated. Adding 100 lM of either SER or MEL to strength Murashige and Skoog (MS) medium and 0.93 lM kinetin (KN) has resulted in enhanced induction of somatic embryogenesis, 85 ± 3 and 62 ± 6 embryos/callus, respectively. In the presence of either 5 mM calcium or 100 lM calcium ionophore A23187, number of somatic embryos/callus is also increased, with 56 ± 4 and 118 ± 10 somatic embryos/callus, respectively, compared to 25 ± 3 embryos/callus for control. The presence of 5 mM calcium chloride along with either 100 lM SER or 100 lM MEL, respectively, have also promoted somatic embryogenesis with induction of 105 ± 6 and 78 ± 2 somatic embryos/callus. While, addition of calcium ionophore A23187 along with either 100 lM SER or 100 lM MEL have produced 155 ± 12 or 135 ± 8 embryos/callus, respectively. In contrast, addition of such indoleamine inhibitors as 40 lM p-chlorophenylalanine (p-CPA), 20 lM fluoexitine hydrochloride (prozac), 1 mM verapamil hydrochloride (calcium channel blocker), and 1 mM ethylene glycol-bis (b-amino ethylether)-N, N, N 0 , N 0 -tetra acetic acid (EGTA) (a calcium chelator) individually, has inhibited induction of somatic embryos while reducing levels of endogenous pools of SER, MEL and indole-3-acetic acid (IAA) levels. Calcium imaging by laser scanning confocal microscopy (LSCM) has revealed high fluorescence intensity in callus treated with calcium and calcium ionophore A23187. Immunolocalization of SER in different tissues of C. canephora has revealed that it is localized in vascular tissues of stems, roots, and somatic embryos, as well as in endocarps (husks) of immature fruits.

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Section: Introductionmentioning

confidence: 75%

Indoleamines and calcium enhance somatic embryogenesis in Coffea canephora P ex Fr

Ramakrishna

Giridhar

Jobin

et al. 2011

Plant Cell Tiss Organ Cult

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“…Serotonin is present at low levels in many plant-derived food products, including coffee beans, cherries, strawberries, and many others [56, 57]. Its role in the plant kingdom may be related to the regulation of root development probably by acting as a natural auxin inhibitor [58].…”

Section: Synthesis Of Other Bioactive Compounds From Aromatic Aminmentioning

confidence: 99%

Bioactive Compounds Derived from the Yeast Metabolism of Aromatic Amino Acids during Alcoholic Fermentation

Mas

Guillamón

Torija

et al. 2014

BioMed Research International

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Metabolites resulting from nitrogen metabolism in yeast are currently found in some fermented beverages such as wine and beer. Their study has recently attracted the attention of researchers. Some metabolites derived from aromatic amino acids are bioactive compounds that can behave as hormones or even mimic their role in humans and may also act as regulators in yeast. Although the metabolic pathways for their formation are well known, the physiological significance is still far from being understood. The understanding of this relevance will be a key element in managing the production of these compounds under controlled conditions, to offer fermented food with specific enrichment in these compounds or even to use the yeast as nutritional complements.

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“…In higher plants, serotonin, usually derived from tryptophan metabolism, plays an 436 important role in innate immunity and can induce the expression of defense genes and 437 cell death, and enhance blast resistance (Fujiwara et al 2010;Ramakrishna et al, 2012).…”

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confidence: 99%