摘要
以牡丹品种‘洛阳红’和‘乌龙捧盛’盆栽苗为试材,通过测定和分析净光合速率(Pn)、气孔导度(Cond)、胞间CO2浓度(Ci)、蒸腾速率(Tr)和水分利用效率(WUE)等光合参数的变化研究逐渐干旱和复水对牡丹光合特性的影响。结果表明:随着水分胁迫程度的增加,两个牡丹品种的净光合速率、气孔导度、胞间CO2浓度、蒸腾速率和水分利用效率均呈逐渐下降的趋势;复水后,各指标均有所上升,但与对照比较,有所下降,有些指标恢复到对照水平;在不同水分处理时,‘洛阳红’净光合速率和水分利用效率均高于‘乌龙捧盛’,表明‘洛阳红’的耐旱性可能更强。
Two potted Paeonia suffruticosa cultivars ＇ Luoyang Hong＇ and ＇ Wulong Pengsheng＇ were used as test materials, and the effects of gradual drought and seedling-recovering watering on their photosynthetic characteristics were investigated through measuring and analyzing the variations of such photosynthetic parameters as net photosynthetic rate（Pn）, stomatal conductance（Cond）,intercellular CO/ concentration （Ci）, transpiration rate （Tr）and water use efficiency （WUE）. The results showed that the Pn, Cond, Ci, Tr and WUE of both cultivars presented a trend of gradual decrease with the increase of drought stress intensity;After seedling-recovering watering,all the indexes somewhat increased but were lower than those of the control though some indexes returned to the control level;In the process of different water treatments, the Pn and WUE of ＇Luoyang Hong＇ were higher than those of ＇Wulong Pengsheng＇,indicating that the drought resistance of ＇Luoyang Hong＇ could be better.
出处
《上海农业学报》
CSCD
北大核心
2014年第5期105-108,共4页
Acta Agriculturae Shanghai
基金
国家自然科学基金(31200468
31370697)
河南科技大学校基金(2007zy040)
关键词
牡丹
光合特性
逐渐干旱
复水
Paeonia suffruticosa
Photosynthetic characteristics
Gradual drought
Seedling-recovering watering
