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《Journal of Anhui Agricultural University》 2017-04
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Effects of salt stress on photosynthetic pigments and chlorophyll fluorescence parameters of camphor seedlings

WANG Jinping;ZHANG Jinchi;YUE Jianmin;FU Zhiyuan;YIN Ronghua;CHEN Gaoyi;Collaborative Innovation Center of Sustainable Forestry in Southern China, The Forestry College of Nanjing Forestry University;Dafeng Forest Farm;  
To provide a theoretical basis for the salt stress research and the introduction to the coastal area of Jiangsu Province for Cinnamomum camphora, the change of leaf photosynthetic pigments and chlorophyll fluorescence parameters of camphor seedlings under Na Cl stress in different times was studied. Camphor seedlings cultivated in the greenhouse were treated with 2‰ and 6‰(mass concentration) Na Cl, and water as the control. On the 7th day(initial stage), the 39 th day(earlier stage), the 76 th day(medium term)and the 120 th day(late period)after Na Cl treatment,the relative high growth and relative base diameter growth before and after the experiment, leaf relative water content, photosynthetic pigment and fluorescence parameters were measured. Results showed that the damage degree became greater with the increase of salt-stress time; the photosynthetic apparatus was damaged severely and the growth of camphor was inhibited obviously under the salt stress of 6‰, but it did not be affected significantly under the salt stress of 2‰; however, in the late period, the ability of salt tolerance of camphor decreased, and the salt stress of 2‰ could also affect its photosynthetic function. Although the photosynthesis of CK also decreased at that time, but it was still stronger than that of the 2‰ salt treatment, which was probably caused by the dormancy due to a significant decrease of temperature.
【Fund】: 江苏省科学技术计划项目(BE2012344);; 林业公益性行业科研专项(201504406);; 江苏省高校自然科学研究重大项目(15KJA220004);; 江苏高校优势学科建设工程项目(PAPD)共同资助
【CateGory Index】: S792.23
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