Effect of abiotic stress on carotenoids accumulation in orange sweet potato callus under light and dark conditions

Jamal P., . and Kammona S., . and Farah Ayuni Mohd Hatta, . and Rashidi Othman, . and Irwandi Jaswir, . Effect of abiotic stress on carotenoids accumulation in orange sweet potato callus under light and dark conditions. S481-S487. ISSN 2231-7546

Abiotic stress factors are the main limitation to plant growth and yield in agriculture. Orange sweet potatoes may become major sources of carotenoids in the diet but the extent of environmental and genetic influences on plant carotenoid biosynthesis are poorly understood. Carotenoid biosynthesis is regulated by several factors such as water light pathogen salinity nutrients and is susceptible to geometric isomerisation in the presence of oxygen light and heat which causes colour loss and oxidation. The main problems associated with carotenoid accumulation arise from the inherent instability of pigments. In this study carotenoid biogenesis is investigated in sweet potato callus culture as a potential model system for carotenogenesis by analysing the effects of environmental stress agents such as NaCl (for salt tolerance) PEG (for drought tolerance) salicylic acid (for pathogen stress or disease resistance) and nutrient strength towards carotenoid content and composition. Results of this study revealed that the bioactive compounds detected in orange sweet potato callus were -carotene -carotene lutein and zeaxanthin. Not surprisingly the response of sweet potato callus culture to such environments appeared to be highly light dependent. Another factor is the activity of functional enzymes and candidate enzymes that regulate carotenoid biosynthesis which will determine type and quantity of individual carotenoids. By understanding the environmental factors that affected carotenoid biosynthesis it should be possible to enhance the amount and type of carotenoid that accumulates in sweet potato tubers. In conclusion in vitro callus culture is suggested as a successful new alternative approaches to enhance or enrich certain carotenoids through controlled environment.

Full text available from: Official URL: http://www.ifrj.upm.edu.my/24%20(07)%202017%20supp...

Abstract

Abiotic stress factors are the main limitation to plant growth and yield in agriculture. Orange sweet potatoes may become major sources of carotenoids in the diet but the extent of environmental and genetic influences on plant carotenoid biosynthesis are poorly understood. Carotenoid biosynthesis is regulated by several factors such as water light pathogen salinity nutrients and is susceptible to geometric isomerisation in the presence of oxygen light and heat which causes colour loss and oxidation. The main problems associated with carotenoid accumulation arise from the inherent instability of pigments. In this study carotenoid biogenesis is investigated in sweet potato callus culture as a potential model system for carotenogenesis by analysing the effects of environmental stress agents such as NaCl (for salt tolerance) PEG (for drought tolerance) salicylic acid (for pathogen stress or disease resistance) and nutrient strength towards carotenoid content and composition. Results of this study revealed that the bioactive compounds detected in orange sweet potato callus were -carotene -carotene lutein and zeaxanthin. Not surprisingly the response of sweet potato callus culture to such environments appeared to be highly light dependent. Another factor is the activity of functional enzymes and candidate enzymes that regulate carotenoid biosynthesis which will determine type and quantity of individual carotenoids. By understanding the environmental factors that affected carotenoid biosynthesis it should be possible to enhance the amount and type of carotenoid that accumulates in sweet potato tubers. In conclusion in vitro callus culture is suggested as a successful new alternative approaches to enhance or enrich certain carotenoids through controlled environment.

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Item Type:	Article
AGROVOC Term:	Sweet potatoes
AGROVOC Term:	Ipomoea batatas
AGROVOC Term:	Carotenoids
AGROVOC Term:	Abiotic stress
AGROVOC Term:	Callus culture
AGROVOC Term:	Biosynthesis
AGROVOC Term:	Environmental factors
AGROVOC Term:	Extraction
AGROVOC Term:	analysis
AGROVOC Term:	Salicylic acids
Geographical Term:	Malaysia
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	28 Apr 2025 05:35
URI:	http://webagris.upm.edu.my/id/eprint/23972

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