Constitutive, institutive and up-regulation of carotenogenesis regulatory mechanism via in vitro culture model system and elicitors
Phytohormone abscisic acid (ABA) plays a regulatory role in many physiological processes in plants and is regulated and controlled by specific key factors or genes. Different environmental stress conditions such as water, drought, cold, light, and temperature result in increased amounts of ABA. Th...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Universiti Kebangsaan Malaysia (UKM)
2015
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/43475/1/MJAS_2.pdf http://irep.iium.edu.my/43475/ http://www.ukm.my/mjas/ |
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| Summary: | Phytohormone abscisic acid (ABA) plays a regulatory role in many physiological processes in plants and is regulated and
controlled by specific key factors or genes. Different environmental stress conditions such as water, drought, cold, light, and
temperature result in increased amounts of ABA. The action of ABA involves modification of gene expression and analysis of in
vitro callus model system cultures revealed several potential of constitutive, institutive and up-regulation acting regulatory
mechanisms. Therefore, this study was aimed at establishing in vitro cultures as potential research tools to study the regulatory
mechanisms of the carotenoid biosynthesis in selected plant species through a controlled environment. The presence and absence
of zeaxanthin and neoxanthin in callus cultures and intact plants could be explained by changes in gene expression in response to
stress. Abiotic stress can alter gene expression and trigger cellular metabolism in plants. This study suggested that the key factors
which involved in regulatory mechanisms of individual carotenoid biosynthesis in a particular biology system of plants can be
either be silenced or activated. Therefore, based on the results in this study environmental stress is made possible for
enhancement or enrichment of certain carotenoid of interest in food crops without altering the genes.
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