首页|Photosynthetic capability and Fe, Mn, Cu, and Zn contents in two Moraceae species under different phosphorus levels

Photosynthetic capability and Fe, Mn, Cu, and Zn contents in two Moraceae species under different phosphorus levels

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The strong adaptability of Broussonetia papyrifera (L.) Vent.to low phosphorus (P) conditions can be attributed to the large amount of root-exuded organic acids and the high efficiency of P extraction.However,microelement contents are influenced by low-P stress,and their effects on the photosynthetic capability of B.papyrifera remain unknown.In this study,we investigated the effects of low-P treatment on net photosynthetic rate (PN);chlorophyll a fluorescence (ChlF) characteristics;and Fe,Mn,Cu,and Zn contents of B.papyrifera and Morus alba L.seedlings.Results show that B.papyrifera exhibited better photosynthetic capability under moderate P deficiency (0.125,0.063,and 0.031 mmol/L P treatments),whereas the photosynthetic capability of M.alba decreased under moderate and severe P deficiency (0.016 and 0 mmol/L P treatments).Under moderate P deficiency,the decrease in Cu and Zn contents in B.papyrifera was lower than that in M.alba.Under severe P deficiency,a considerable decrease of photosynthetic capability in B.papyrifera and M.alba was associated with low Cu and Zn contents.The PN of the two Moraceae species exhibited a better correlation with Cu and Zn contents than with Fe or Mn content.P deficiency could not only decrease cyclic photophorylation and photosynthetic efficiency,but could also affect the stability of thylakoid membrane structure and electron transport efficiency by influencing the contents of Cu or Zn,thereby affecting photosynthesis.

AdaptabilityChlorophyll a fluorescenceMicroelementOrganic acidsSensitive

Deke Xing、Yanyou Wu、Rui Yu、Yansheng Wu、Chuan Zhang、Zheng Liang

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Key Laboratory of Modem Agricultural Equipment and Technology, Ministry of Education, Institute of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China

Research Center for Environmental Bio-Science and Technology, State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China

This study was supported by the project of the National Natural Science Foundation of Chinaa project funded by the Priority Academic Program Development of Jiangsu higher education institutions (PAPD)research foundation for introduce talents of Jiangsu universitybrainstorm project on social development of Guizhou Province

3130124313JDG030SY[2010]3043

2016

10.1007/s11631-016-0099-1

地球化学学报(英文版)
中国科学院地球化学研究所

地球化学学报(英文版)

EI
影响因子：0.33
ISSN：2096-0956
年,卷(期)：2016.35(3)
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