Production of β-β,Dimethylacrylshikonin in Callus Cultures of Onosma echioides Var hispidum Clarke

Callus tissues derived from leaf segments of Onosma echioides var hispidum on three basal media viz. Murashige & Skoog (MS), Gamborg et al (B₅) and White’s containing 3% sucrose produce napthaquinone pigments in presence of and NAA. However, β-β,dimethylacrylshikonin synthesis was triggered in d...

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Published in:Journal of plant biochemistry and biotechnology 2005, Vol.14 (2), p.193-195
Main Authors: Lattoo, Surrinder K, Koul, Sushma, Dhar, Manoj K, Khajuria, Ravi K, Gupta, Devinder K, Dhar, Autar K, Qazi, Ghulam N
Format: Article
Language:English
Subjects:
agar
biosynthesis
callus
callus culture
cell walls
fluorescent lighting
indole butyric acid
intercellular spaces
leaves
Lithospermum erythrorhizon
microscopy
naphthaleneacetic acid
Onosma echioides
pigments
plasma membrane
shikonin
sucrose
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cited_by cdi_FETCH-LOGICAL-c170t-e61fbf1498ad122bb509109d9e153b63329a77a23323faedf4a3501b52179d183
cites cdi_FETCH-LOGICAL-c170t-e61fbf1498ad122bb509109d9e153b63329a77a23323faedf4a3501b52179d183
container_end_page 195
container_issue 2
container_start_page 193
container_title Journal of plant biochemistry and biotechnology
container_volume 14
creator Lattoo, Surrinder K
Koul, Sushma
Dhar, Manoj K
Khajuria, Ravi K
Gupta, Devinder K
Dhar, Autar K
Qazi, Ghulam N
description Callus tissues derived from leaf segments of Onosma echioides var hispidum on three basal media viz. Murashige & Skoog (MS), Gamborg et al (B₅) and White’s containing 3% sucrose produce napthaquinone pigments in presence of and NAA. However, β-β,dimethylacrylshikonin synthesis was triggered in dark in undifferentiated parenchyma cells on B₅ agar medium containing 1 x10⁻⁵ M Kn and 2×10⁻⁶ M IBA when proliferated calli after 16 weeks (4ᵗʰ generation) were transferred to it and incubated at 23 ± 1 °C. The pigment biosynthesis increased linearly from 4ᵗʰ to 6ᵗʰ week after a lag of first 3 weeks. Callus grew exponentially after a lag of 2 weeks and diminished from 6ᵗʰ week onward. During 8 weeks of growth, callus grew from 0.8 to 8.2 g and the β-β, dimethylacrylshikonin showed the highest level of 25.41 μg g⁻¹ of fresh tissue. Light microscopic examination of semi-thin sections of pigmented tissue revealed pigment accumlation between the plasma membrane and cell wall and also in the intercellular spaces. Exposure of cultures to white fluorescent light for more than 2 h resulted in complete repression of pigment bosynthesis. The investigations suggest that the regulatory mechanism for the biosynthesis and accumulation of napthaquinone pigment(s) may be similar to that of Lithospermum erythrorhizon. Pigment producing capability of callus cultures of O. echioides var hispidum can be exploited as an alternative raw source for the production of shikonin derivatives.
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Murashige &amp; Skoog (MS), Gamborg et al (B₅) and White’s containing 3% sucrose produce napthaquinone pigments in presence of and NAA. However, β-β,dimethylacrylshikonin synthesis was triggered in dark in undifferentiated parenchyma cells on B₅ agar medium containing 1 x10⁻⁵ M Kn and 2×10⁻⁶ M IBA when proliferated calli after 16 weeks (4ᵗʰ generation) were transferred to it and incubated at 23 ± 1 °C. The pigment biosynthesis increased linearly from 4ᵗʰ to 6ᵗʰ week after a lag of first 3 weeks. Callus grew exponentially after a lag of 2 weeks and diminished from 6ᵗʰ week onward. During 8 weeks of growth, callus grew from 0.8 to 8.2 g and the β-β, dimethylacrylshikonin showed the highest level of 25.41 μg g⁻¹ of fresh tissue. Light microscopic examination of semi-thin sections of pigmented tissue revealed pigment accumlation between the plasma membrane and cell wall and also in the intercellular spaces. Exposure of cultures to white fluorescent light for more than 2 h resulted in complete repression of pigment bosynthesis. The investigations suggest that the regulatory mechanism for the biosynthesis and accumulation of napthaquinone pigment(s) may be similar to that of Lithospermum erythrorhizon. 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Murashige &amp; Skoog (MS), Gamborg et al (B₅) and White’s containing 3% sucrose produce napthaquinone pigments in presence of and NAA. However, β-β,dimethylacrylshikonin synthesis was triggered in dark in undifferentiated parenchyma cells on B₅ agar medium containing 1 x10⁻⁵ M Kn and 2×10⁻⁶ M IBA when proliferated calli after 16 weeks (4ᵗʰ generation) were transferred to it and incubated at 23 ± 1 °C. The pigment biosynthesis increased linearly from 4ᵗʰ to 6ᵗʰ week after a lag of first 3 weeks. Callus grew exponentially after a lag of 2 weeks and diminished from 6ᵗʰ week onward. During 8 weeks of growth, callus grew from 0.8 to 8.2 g and the β-β, dimethylacrylshikonin showed the highest level of 25.41 μg g⁻¹ of fresh tissue. Light microscopic examination of semi-thin sections of pigmented tissue revealed pigment accumlation between the plasma membrane and cell wall and also in the intercellular spaces. Exposure of cultures to white fluorescent light for more than 2 h resulted in complete repression of pigment bosynthesis. The investigations suggest that the regulatory mechanism for the biosynthesis and accumulation of napthaquinone pigment(s) may be similar to that of Lithospermum erythrorhizon. 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Murashige &amp; Skoog (MS), Gamborg et al (B₅) and White’s containing 3% sucrose produce napthaquinone pigments in presence of and NAA. However, β-β,dimethylacrylshikonin synthesis was triggered in dark in undifferentiated parenchyma cells on B₅ agar medium containing 1 x10⁻⁵ M Kn and 2×10⁻⁶ M IBA when proliferated calli after 16 weeks (4ᵗʰ generation) were transferred to it and incubated at 23 ± 1 °C. The pigment biosynthesis increased linearly from 4ᵗʰ to 6ᵗʰ week after a lag of first 3 weeks. Callus grew exponentially after a lag of 2 weeks and diminished from 6ᵗʰ week onward. During 8 weeks of growth, callus grew from 0.8 to 8.2 g and the β-β, dimethylacrylshikonin showed the highest level of 25.41 μg g⁻¹ of fresh tissue. Light microscopic examination of semi-thin sections of pigmented tissue revealed pigment accumlation between the plasma membrane and cell wall and also in the intercellular spaces. 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subjects agar
biosynthesis
callus
callus culture
cell walls
fluorescent lighting
indole butyric acid
intercellular spaces
leaves
Lithospermum erythrorhizon
microscopy
naphthaleneacetic acid
Onosma echioides
pigments
plasma membrane
shikonin
sucrose
title Production of β-β,Dimethylacrylshikonin in Callus Cultures of Onosma echioides Var hispidum Clarke
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