广西植物2016，Vol.36Issue(8)：956-962,7.DOI:10.11931/guihaia.gxzw201501032
淹水胁迫下江南牡丹生长及光合特性研究
Effects of flooding stress on growth and photosynthesis of Paeonia suffruticosa
摘要
Abstract
Growth and photosynthesis of three-year-old seedlings of Paeonia suffruticosa“fengdanbai” were investigated in a 30-day flooding experiment. Three treatment levels were set in this experiment:normal management, mild stress and severe stress levels. The results showed that after 30 d of the above three treatments accordingly, the height growth of P. suffruticosa was 3.6, 1.1 and 0.73 cm, the ground diameter growth of P. suffruticosa was 0.21, 0.11 and 0.06 cm. The increase in total plant biomass was 7.0, 3.0 and 2.75 g. The difference was remarkable between flooding stress and nor-mal growth, the growth of P. suffruticosa was seriously affected by flooding stress. At the same time, total chlorophyll content increased under normal management, but declined under stress conditions. The root activity decreased when trea-ted with flooding at different times. Meanwhile, under flooding stress, the transpiration rate and stomatal conductance of P. suffruticosa also decreased. Under mild flooding stress, the intercellular carbon dioxide concentration first increased and then decreased, but increased under severe flooding stress. The study suggests that flooding stress affects the P. suf-fruticosa root vigor, stem, leaf growth and photosynthetic characteristics. This study will provide the information for stress mechanism of jiangnan P. suffruticosa.关键词
江南牡丹/淹水胁迫/根系活力/生长/光合作用Key words
Paeonia suffruticosa/flooding stress/root activity/growth/photosynthesis分类
农业科技引用本文复制引用
朱向涛,金松恒,哀建国,时浩杰..淹水胁迫下江南牡丹生长及光合特性研究[J].广西植物,2016,36(8):956-962,7.基金项目
国家自然科学基金(31170584)；浙江省教育厅项目(Y201223938)；浙江农林大学博士科研启动基金(2011FR017)[Supported by the National Natural Science Foundation of China (31170584)； Zhejiang Program of Educational Office (Y201223938)； Start-up Program for Doctors Re-search of Zhejiang Agricultural and Forestry University (2011FR017)]。 （31170584）
