講演詳細

生理部門[Tree Physiology]

開始時刻	ポスター発表
講演番号	PG-7
発表題目	Response of isoprene emission and the xanthophyll cycle to changes in light intensity Response of isoprene emission and the xanthophyll cycle to changes in light intensity
所属	京都大学
要旨本文	Biogenic Volatile Organic Compounds (BVOCs), mainly composed of isoprene, are emitted from plants in response to light and temperature. BVOCs emitted from leaves of eight tree species were collected by the leaf cuvette method with a portable photosynthesis measurement device (LI-6400, Li-Cor) and identified and quantified using GC-MS (QP2010 SE, Shimadzu). Simultaneously, net photosynthetic rates were measured. In addition, leaf pigment composition was analyzed at different light intensities. The calculation of DPS (xanthophyll cycle in the de-epoxidized state), which is considered a measure of heat release, showed interspecific differences. We measured the diurnal changes in isoprene emission rates of two isoprene emitter species. Diurnal changes in isoprene emission were well synchronized with sunlight intensity and also with changes in photosynthetic rate. These results indicated that isoprene synthesis is maintained during times of high photosynthetic rate under intense light.
著者氏名	○Tsuji, Shoko1 ・ Masui, Noboru2 ・ Miyama, Takafumi3 ・ Okumura, Motonori4 ・ Takanashi, Satoru3 ・ Tani, Akira2
著者所属	1Kyoto University ・ 2University of Shizuoka ・ 3Forestry and Forest Products Research Institute ・ 4Research Institute of Environment, Agriculture and Fisheries, Osaka Prefectural Government
キーワード	BVOC, Isoprene, xanthophyll cycle, photosynthesis, high light stress
Key word	BVOC, Isoprene, xanthophyll cycle, photosynthesis, high light stress