摘要
为探明遮阴对珠子参生长发育和光合生理特性的影响,对盆栽珠子参分别采取全光照、30%遮阴和50%遮阴3种处理。在珠子参生长90天后,考察各处理下珠子参植物学性状、生理指标和光合特性。结果表明,与全光照相比,30%遮阴处理下珠子参株高、主茎粗、果实数、根茎直径、叶绿素含量、SOD和POD活性增加,地下根茎节间长度和叶MDA含量减小。遮阴处理后珠子参净光合速率(Pn)、气孔导度(Gs)和蒸腾速率(Tr)低于全光照处理,胞间CO_2浓度(C_i)则高于全光照处理。遮阴有效地缓解了珠子参的"午休"并降低了光抑制,其中,30%遮阴处理效果最显著,为珠子参的生长提供了较为适宜的环境。
The paper aims to study the effects of shading on growth and development and photosynthetic physiological characteristics of Panax japonicus var.major.The authors investigated the botanical characters,physiological index and photosynthetic characteristics under different shading treatments（0%,30% and 50%）when Panax japonicus var.major grew about 90 days.The results showed that： compared with control,the stem length,stem diameter,fruit number,rhizome diameter,content of chlorophyll,the activity of superoxide dismutase（SOD） and peroxidase（POD） were enhanced under 30% shading treatment,and the internode length of underground stem and malondialdehyde（MDA） content declined; the net photosynthetic rate（Pn）,stomatal conductance（Gs） and transpiration rate（Tr） under shading treatments were lower than that of the control,while the intercellular CO_2 concentration（Ci） was higher than that of the control.Shading treatments effectively alleviate midday depression and reduce the photoinhibition of Panax japonicus var.major,thereinto,30% shading treatment is the most effective,which provides a suitable environment for the growth of Panax japonicus var.major.
作者
黄文静
孙晓春
王楠
李铂
王征
刘妍如
贾蕊
唐志书
Huang Wenjing1, Sun Xiaochun1, Wang Nan1, Li Bo1, Wang Zheng1, Liu Yanru1, Jia Rui1,2, Tang Zhishu1,2(1Shaanxi University of Chinese Medicine/Shaanxi Collaborative Innovation Center of Chinese Medicinal Resources Industrialization, Xianyang Shaanxi 712083; 2College of Pharmacy, Shaanxi University of Chinese Medicine, Xianyang Shaanxi 71204)
出处
《中国农学通报》
2018年第5期49-53,共5页
Chinese Agricultural Science Bulletin
基金
陕西省社会发展科技攻关项目"陕西珍稀道地药材珠子参中皂苷合成三个关键酶基因的克隆和时空表达分析"(2015SF300)
陕西省教育厅自然科学专项项目"桔梗不同部位的化学成分及关键基因的差异表达研究"(15JK1206)
陕西省教育厅人文社科专项"陕西中医药大健康产业商业模式研究"(15JK1193)
陕西中医药大学科研基金项目"干旱胁迫下黄芪药用次生代谢物随生态化学计量变化的机理研究"(2016QN33)
关键词
珠子参
遮阴
生长发育
光合特性
Panax japonicus var. major
shading
growth and development
photosynthetic physiological characteristic
