Effects of phosphate deficiency on assimilate partitioning in barley seedlings |
| |
| Institution: | 1. Department of Urology, University of Alabama at Birmingham, Birmingham, AL;2. Department of Urology, University of Kansas Medical Center, Kansas City, KS;1. Department of Biostatistics, School of Health, Kermanshah University of Medical Sciences, Kermanshah, Iran;2. Epidemiology and Biostatistics Unit, Rheumatology Research Center, Tehran University of Medical Sciences, Tehran, Iran;3. The Persian Gulf Tropical Medicine Research Center, The Persian Gulf Biomedical Sciences Research Institute, Bushehr University of Medical Sciences, Bushehr, Iran;4. Department of Virology, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran;5. Student Research Committee, Iran University of Medical Sciences, Tehran, Iran;6. Research Center for Environmental Determinants of Health, Research Institute for Health, Kermanshah University of Medical Sciences, Kermanshah, Iran;7. Golestan Hospital Research Center, Tehran, Iran;8. Department of Microbiology, Faculty of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran;9. Department of Biology, Central Tehran Branch, Islamic Azad University, Tehran, Iran;10. Cancer Research Center, Kermanshah University of Medical Sciences, Kermanshah, Iran;11. Department of Animal Biology, Faculty of Biological Sciences, Kharazmi University, Tehran, Iran;12. Division of General Internal Medicine, Toronto General Hospital, Toronto, Canada;13. Research Center for Biochemistry and Nutrition in Metabolic Diseases, Institute for Basic Sciences, Kashan University of Medical Sciences, Kashan, Iran;1. Waite Research Institute and School of Agriculture, Food and Wine, University of Adelaide, Waite Campus, Glen Osmond, SA, 5064, Australia;2. CSIRO Agriculture and Food, Waite Campus, Glen Osmond, SA, 5064, Australia;1. Department of Earth Sciences, National Cheng Kung University, Tainan, Taiwan;2. Department of Cultural Heritage Conservation, National Yunlin University of Science & Technology, Douliu, Taiwan;3. National Synchrotron Radiation Center, Hsinchu, Taiwan;4. Department of Optics and Photonics, National Central University, Chung-Li, Taiwan;5. Department of Chemistry, National Tsing Hua University, Hsinchu, Taiwan;1. Institute of Pure and Applied Biology, Bahauddin Zakariya University, Multan 60800, Pakistan;2. Department of Environmental Sciences, Bahauddin Zakariya University, Multan 60800, Pakistan;3. Department of Agricultural Engineering, Muhammad Nawaz Shareef University of Agriculture, Multan 60000, Pakistan;4. Department of Agronomy, Pir Mehr Ali Shah (PMAS) Arid Agriculture University Rawalpindi, 46300, Pakistan;5. Department of Agronomy, Muhammad Nazwaz Shareef University of Agriculture, Multan 60000, Pakistan;6. Department of Agronomy, Bahauddin Zakariya University, Multan 60800, Pakistan;7. Institute of Agricultural Sciences, Quaid-e-Azam Campus, University of the Punjab, Lahore 54590, Pakistan;8. Department of Agronomy, University of Poonch, Rawalakot, Azad Jammu and Kashmir, Pakistan;9. Unit of Bee Research and Honey Production, Faculty of Science, King Khalid University, P.O. Box 9004, Abha 61413, Saudi Arabia;10. Bee Research Chair, Plant Protection Department, College of Food and Agriculture Sciences, King Saud University, PO Box 2460, Riyadh 11451, Saudi Arabia;11. Department of Botany, Ghazi University, Dera Ghazi Khan 32200, Punjab, Pakistan;12. Center of Excellence in Biotechnology Research, King Saud University, P.O. Box: 2455, Riyadh 11451, Saudi Arabia |
| |
| Abstract: | Photosynthesis and assimilate partitioning were measured in barley (Hordeum vulgare L.) seedlings raised from seed with mineral nutrient solution containing either 0 or 1 mmolar orthophosphate (Pi). Carbon assimilation rates and leaf extension rates were inhibited about 40% by low Pi treatment. Starch and sucrose levels were similar in Pi-depleted compared to control leaves during most of the photoperiod. These results indicated that low Pi treatment inhibited carbon export from the primary leaf. Acid extractable Pi decreased about 60% in Pi-depleted barley leaves after a dark to light transition. In similar experiments with control barley and tobacco (Nicotiana tabacum L.) leaves acid extractable Pi decreased about 25% and 15%, respectively. These findings provided preliminary evidence for a diurnal variation in leaf Pi content. Photosynthetic intermediate levels were lower and extractable enzyme activities were the same or higher in low Pi compared to control leaves. These observations suggested that photosynthetic intermediate pools turnover more quickly in low Pi than in Pi-sufficient leaves. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
