Effects of High Temperature on Photosynthesis, Membrane Lipid Peroxidation and Osmotic Adjustment in Four Rhododendron Species - Collections

＜departmental bulletin paper＞
Effects of High Temperature on Photosynthesis, Membrane Lipid Peroxidation and Osmotic Adjustment in Four Rhododendron Species

Creator	Creator Name GENG, Xing–Min Affiliation Affiliation Name Department of Landscape Plant, Nanjing Forestry University Affiliation Affiliation Name Laboratory of Horticultural Science, Department of Bioresource Sciences, Faculty of Agriculture, Kyushu University
	Creator Name YANG, Qiu–Yu Affiliation Affiliation Name Department of Landscape Plant, Nanjing Forestry University Affiliation Affiliation Name Laboratory of Horticultural Science, Department of Bioresource Sciences, Faculty of Agriculture, Kyushu University
	Creator Name YUE, Yuan Affiliation Affiliation Name Department of Landscape Plant, Nanjing Forestry University Affiliation Affiliation Name Laboratory of Horticultural Science, Department of Bioresource Sciences, Faculty of Agriculture, Kyushu University
	Author PID K001614 Creator Name OZAKI, Yukio 尾崎, 行生オザキ, ユキオ Affiliation Affiliation Name Laboratory of Horticultural Science, Department of Bioresource Sciences, Faculty of Agriculture, Kyushu University 九州大学大学院農学研究院資源生物科学部門
Language	English
Publisher	Faculty of Agriculture, Kyushu University
Publisher	九州大学大学院農学研究院
Date	2019-02-28
Source Title	Journal of the Faculty of Agriculture, Kyushu University
Vol	64
Issue	1
First Page	33
Last Page	38
Publication Type	Version of Record
Access Rights	open access
Crossref DOI	https://doi.org/10.5109/2231631

File	FileType	Size	Views	Description
p033	pdf	1.25 MB	784

PISSN	0023-6152
NCID	AA00697606
Record ID	2231631
Subject Terms	compatible osmolytes
	heat stress
	photoinhibition
	Rhododendron
	superoxide dismutase
Notes	In order to make clear the response mechanism of Rhododendron species to high temperature, two– year–old seedlings of R. fortunei, R. ovatum, R. simsii and R. mariesii were heat–stressed at 42°C/30°C (day/night) for 24 h. Four Rhododendron species under heat stress showed significant differences in heat injury indices (HII), and R. fortunei was more sensitive to high temperature than the other three species. The lipid peroxidation of R. fortunei seedling was most serious indicated by malondialdehyde (MDA), which could be related to the significant decrease of superoxide dismutase (SOD) activity in R. fortunei seedlings. In the other three heat–resistant species, the content of soluble proteins and SOD activity increased under heat stress. The accumulation of proline and soluble sugars was found in greater heat– resistant species, which could alleviate osmotic stress of rhododendron seedlings under high temperature. Net photosynthesis (PN) rates for four species were inhibited at different levels due to heat stress, but reduction proportion of PN for R. fortunei was highest due to mainly nonstomatal factors.
Created Date	2019.04.15
Modified Date	2022.11.11