期刊论文

Effects of titanium dioxide spraying agents on photosynthesis and chlorophyll fluorescence parameters of upper tobacco leaves

中文

华南农业大学学报

1001-411X

2018

39

4

33-38

10.7671/j.issn.1001-411X.2018.04.006

国家烟草专卖局资助项目（110201402003）；

本校为第一机构

【目的】探讨二氧化钛喷施剂对烤烟上部烟叶光合作用及叶绿素荧光参数的影响,为提高上部烟叶的可用性提供参考。【方法】以溶胶–凝胶法特制的二氧化钛为材料,研究了不同浓度和配方的喷施剂对成熟期上部烟叶光合色素含量、光合生理指标及叶绿素荧光参数的影响。【结果】二氧化钛喷施剂延缓了上部烟叶中叶绿素和类胡萝卜素的降解速度。二氧化钛喷施剂对上部烟叶的光合作用和叶绿素荧光参数影响显著,喷施剂降低了上部烟叶的净光合速率、气孔导度、蒸腾速率,提高了胞间二氧化碳浓度,对叶温的影响不明显;喷施剂处理的PSⅡ最大光化学效率(Fv/Fm)、PSⅡ潜在活力(Fv/Fo)、光化学淬灭系数(qP)均高于清水...

【Objective】To explore the effect of TiO_2 spraying agent on photosynthesis and chlorophyll fluorescence parameters of upper tobacco leaves, and provide a reference for improving the availability of upper tobacco leaves.【Method】TiO_2 spraying agent was preparated by means of sol-gel method. The effects of different concentrations and formulas of TiO_2 spraying agent on photosynthetic pigment content, photosynthetic physiological indexes and chlorophyll fluorescence parameters of upper tobacco leaves at maturity were studied.【Result】TiO_2 s...