EXPRESSION OF A SESAME GERANYLGERANYL REDUCTASE cDNA IS INDUCED BY LIGHT BUT REPRESSED BY ABSCISIC ACID AND ETHYLENE
Year: 2010
Type: article
Abstract: Geranylgeranyl reductase (CHL P) is localized in plastids and catalyzes the reduction of geranylgeranyl diphosphate to phytyl diphosphate, a molecule required for both tocopherol and chlorophyll biosyntheses. To understand the regulation of Chl P expression in sesame, a Chl P cDNA (SiChlP) was isolated and the effects of light and phytohormones on SiChl P expression was investigated. The putative SiChl P cDNA was 1,633 bp and included a 1,394 bp open reading frame encoding a polypeptide of 465 amino acid residues. SiChl P mRNA was expressed most abundantly in leaves and cotyledons, moderately in developing capsules and seeds, but little in flowers, hypocotyls and roots of healthy seedlings and plants. Expression of SiChl P in a cotyledon was induced by light, but the level of induction was higher in red light than in far-red or blue light. However, SiChl P expression was diminished by dark, ethylene and abscisic acid.
Source: Pakistan Journal of Botany
Authors: Myoung-Ryoul Park, Eunae Cho, Shafiqur Rehman, Song-Joong Yun
Institution: Jeonbuk National University
Language: English
Subfield: Molecular Biology
Domain: Life Sciences
SDG: Zero hunger
Open Access status: diamond
OpenAlex ID: W2189138590