Journal of Food, Agriculture and Environment
Vol 11,
Issue 3&4,2013
Online ISSN: 1459-0263
Print ISSN: 1459-0255
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Response of chlorophyll fluorescence parameters to different temperature stresses in Prunus campanulata Maxim. and Prunus yedoensis Matsum. seedlings
Author(s):
Yinghui Zhang 1,
Jundong Rong 2, Liguang Chen 2, Shuping Li 2, Tianyou He 1, Lingyan Chen 1, Yushan Zheng 1, 2*Recieved Date: 2013-06-20, Accepted Date: 2013-10-06
Abstract:After exposing the cold-sensitive variety P. campanulata (Prunus campanulata Maxim.) and the cold-tolerant variety P. yedoensis (Prunus yedoensis Matsum.) seedlings to different temperatures (25, 15, 6 and 1°C), the relative chlorophyll content and chlorophyll fluorescence parameters were measured in leaves to detect the influence of temperature on the photosynthetic activity. The aim of this study was to lay a foundation for resistance breeding of P. campanulata. Compared to the control, both species exhibited a continuous increase in initial fluorescence (F0) and decrease in chlorophyll content, maximum photochemical efficiency (Fv/Fm) and photochemical quenching coefficient (qP) with decreases in temperature. The actual photochemical quantum (yield) and electron transfer rate (ETR) in the 15°C treatment were significantly higher than those in the control, while they declined under the 6°C and 1°C treatment over time. The non- photochemical quenching coefficient (qN) increased under the 15°C and 6°C treatments and decreased under the 1°C treatment. The most significant changes in the parameters occurred under the 1°C treatment, indicating that both species exhibited low-temperature photoinhibition. Under low temperatures, P. yedoensis seedlings exhibited less damage in PSII function and the antenna system and became more cold-tolerant by protecting the photosynthetic apparatus through the increased dissipation of excess light compared to P. campanulata; this protection could be a physiological mechanism of cold tolerance.
Keywords:Prunus campanulata Maxim.,
Prunus yedoensis Matsum., chlorophyll fluorescence parameters, low temperatureJournal: Journal of Food, Agriculture and Environment
Year: 2013
Volume: 11
Issue: 3&4
Category: Environment
Pages: 2797-2802
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