Effects of LaCl3 on the growth and photosynthetic characteristics of Fny-infected tobacco seedlings
来源期刊：Journal of Rare Earths2012年第7期
论文作者：高永生 黄伟峰 朱丽云 陈集双
文章页码：725 - 730
摘 要：Plant growth, gas exchange characteristics, chlorophyll fluorescence, disease index, and disease prevention efficiency of LaCl3 in tobacco （Nicotiana glutinosa） plants infected by Fny-CMV （fny stain of cucumber mosaic virus） strain were determined. Leaf area, chloro-phyll and carotenoid contents, maximum photosynthesis rate, apparent quantum yield, and carboxylation efficiency dramatically decreased after 5 weeks post inoculation. The plants infected by Fny-CMV only presented much severer symptom than those infected in the presence of appropriate concentration of LaCl3. ETR （apparent rate of photosynthetic electron transport）, NPQ （nonphotochemical quenching）, qP （coef-ficient of photochemical quenching）, and yield （II） in infected tobacco plants obviously reduced in higher light intensity after 5 weeks post inoculation. And these fluorescence parameters in Fny-infected plants obviously reduced compared with those in the plants infected by Fny in the presence of LaCl3. Together with the growth status and disease index, it revealed that exogenously appropriate concentration of LaCl3 could significantly alleviate the damage of tobacco seedlings caused by Fny-CMV.
高永生1，黄伟峰1，朱丽云1，陈集双2
1. College of Life Science, China Jiliang University2. Institute of Bioengineering, Zhejiang Sci-tech University
摘 要：Plant growth, gas exchange characteristics, chlorophyll fluorescence, disease index, and disease prevention efficiency of LaCl3 in tobacco （Nicotiana glutinosa） plants infected by Fny-CMV （fny stain of cucumber mosaic virus） strain were determined. Leaf area, chloro-phyll and carotenoid contents, maximum photosynthesis rate, apparent quantum yield, and carboxylation efficiency dramatically decreased after 5 weeks post inoculation. The plants infected by Fny-CMV only presented much severer symptom than those infected in the presence of appropriate concentration of LaCl3. ETR （apparent rate of photosynthetic electron transport）, NPQ （nonphotochemical quenching）, qP （coef-ficient of photochemical quenching）, and yield （II） in infected tobacco plants obviously reduced in higher light intensity after 5 weeks post inoculation. And these fluorescence parameters in Fny-infected plants obviously reduced compared with those in the plants infected by Fny in the presence of LaCl3. Together with the growth status and disease index, it revealed that exogenously appropriate concentration of LaCl3 could significantly alleviate the damage of tobacco seedlings caused by Fny-CMV.
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