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Temporal Regulation of Terpene Synthase Gene Expression in

Temporal Regulation of Terpene Synthase Gene Expression in

Arooran Kanagendran, Leila Pazouki, Rudolf Bichele, Carsten Külheim, Ülo Niinemets

Environ Exp Bot. 2018 Nov 1;155:552-565.

PMID: 30686846

Abstract:

Ozone and wounding are key abiotic factors but, their interactive effects on temporal changes in terpene synthase gene expression and emission responses are poorly understood. Here, we applied combined acute ozone and wounding stresses to the constitutive isoprenoid-emitter Eucalyptus globulus and studied how isoprene, 1,8-cineole, and isoledene synthase genes were regulated, and how the gene expression was associated with temporal changes in photosynthetic characteristics, product emission rates, and stomatal ozone uptake through recovery phase. Photosynthetic characteristics and emission rate of isoprene, 1,8-cineole, and isoledene were synergistically altered, while three TPS gene expressions were antagonistically altered by combined stress applications. A time-delay analysis indicated that the best correspondences between gene expression and product emission rates were observed for 0 h time-shift for wounding and 0-2 h time-shifts for separate ozone, and combined ozone and wounding treatments. The best correspondence between ozone uptake and gene expression was observed for 0-4 h time-shifts for separate ozone and combined ozone and wounding treatments. Overall, this study demonstrated that expression profiles of isoprene, the monoterpene 1,8-cineole, and the sesquiterpene isoledene synthase genes differentially influenced their corresponding product emissions for separate and combined ozone and wounding treatments through recovery.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP95910364	(−)-Isoledene		95910-36-4	Price

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