The Characteristics Chlorophyll Fluorescence among Plant with Different Ecophysiological Behavior.

• Main Authors: Tsung-Ping Lin, 林宗平
• Other Authors: Jen-Hsien Weng
• Format: Others
• Language: zh-TW
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/09879136689648604493

碩士 === 國立中興大學 === 生命科學系 === 91 === Abstract In order to understand the characteristics of chlorophyll fluorescence under different environments among plants with different ecophyiological behavior, two experiments were made in the Tatachia area and the campus of National Chung Hsing University, respectively. In the Tatachia area, maximum photochemical efficiency of PSⅡ（Fv/Fm）of six tested plants gradual decreased during autumn and recover in spring. It was found that Fv/Fm of all the tested species showed significant correlation with minimum air temperature of the measured day. Among them, the Fv/Fm of Trochodendron aralioides（C3 tree）、Yushania niitakayamensis（C3 Gramineae）and Miscanthus transmorrisonensis（C4 Gramineae） were most influenced by temperature, followed by Pinus taiwanensis （conifer tree）and Rhododendron morii（C3 tree）, and Strancaesia niitakayamensis（C3 tree）was influenced slightly by temperature. When the leaves of litchi and acacia were coated with a water-soluble wax to inhibit the CO2 diffuse into leaves but maintain the water content. It was founded that in high levels of illumination, litchi leaves showed lower levels of Fv/Fm and nonphotochemical fluorescence quenching (NPQ), compared to those of acacia leaves. It could be considered that under higher illumination, CO2 diffusion limited acacia leaves exhibited a higher ability of xanthophyll cycle to dissipate more excess energy to avoid the damage of PSII. Therefore, acacia could adapt to the drought condition, where the stomatal often closure due to water deficits. Besides, NPQ closely related to the energy dissipation could be considered as an advantageous fluorescence parameter for eco-physiological study.