Nitrogen fertilisation reduces sink strength of poplar ectomycorrhizae during recovery after drought more than phosphorus fertilisation
Background and aims Drought reduces the carbon (C) flux from leaves (source) to mycorrhizal roots (sink); however, during recovery from drought, C flux exceeds the levels observed in irrigated controls. This process could be source- or sink-controlled. We studied this source–sink relationship in an...
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| Veröffentlicht in: | Plant and soil 2017-10, Vol.419 (1/2), p.405-422 |
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| creator | Nickel, U. T. Winkler, J. B. Mühlhans, S. Buegger, F. Munch, J. C. Pritsch, K. |
| description | Background and aims Drought reduces the carbon (C) flux from leaves (source) to mycorrhizal roots (sink); however, during recovery from drought, C flux exceeds the levels observed in irrigated controls. This process could be source- or sink-controlled. We studied this source–sink relationship in an agronomically used poplar clone grown at different levels of nitrogen (N) and phosphorus (P) fertilisation as used in silvoarable agroforestry systems. Methods We conducted a fully factorial pot experiment combining four fertiliser and two drought regimes. Gas exchange and chlorophyll and flavonol indices were regularly monitored. One week after rewatering, we performed 13CO2 pulse labelling. At harvest, enzyme activities of ectomycorrhizal root tips were determined. Results After one week of recovery, we observed an excess in C allocation to ectomycorrhizae (ECM) in non-N-fertilised treatments. However, net photosynthesis only recovered to the level of continuously irrigated controls. Drought increased chitinase, cellulase, phosphatase and peptidase activities, but the latter only in N-fertilised treatments. Conclusions We add evidence that the allocation of recently assimilated C is most likely sink-controlled. Less C allocation to recovering ECM supplied with fertiliser may be either due to better nutritional status and hence higher stress tolerance, or due to partitioning between above and below-ground sinks. |
| doi_str_mv | 10.1007/s11104-017-3354-2 |
| format | Article |
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T. ; Winkler, J. B. ; Mühlhans, S. ; Buegger, F. ; Munch, J. C. ; Pritsch, K.</creator><creatorcontrib>Nickel, U. T. ; Winkler, J. B. ; Mühlhans, S. ; Buegger, F. ; Munch, J. C. ; Pritsch, K.</creatorcontrib><description>Background and aims Drought reduces the carbon (C) flux from leaves (source) to mycorrhizal roots (sink); however, during recovery from drought, C flux exceeds the levels observed in irrigated controls. This process could be source- or sink-controlled. We studied this source–sink relationship in an agronomically used poplar clone grown at different levels of nitrogen (N) and phosphorus (P) fertilisation as used in silvoarable agroforestry systems. Methods We conducted a fully factorial pot experiment combining four fertiliser and two drought regimes. Gas exchange and chlorophyll and flavonol indices were regularly monitored. One week after rewatering, we performed 13CO2 pulse labelling. At harvest, enzyme activities of ectomycorrhizal root tips were determined. Results After one week of recovery, we observed an excess in C allocation to ectomycorrhizae (ECM) in non-N-fertilised treatments. However, net photosynthesis only recovered to the level of continuously irrigated controls. Drought increased chitinase, cellulase, phosphatase and peptidase activities, but the latter only in N-fertilised treatments. Conclusions We add evidence that the allocation of recently assimilated C is most likely sink-controlled. Less C allocation to recovering ECM supplied with fertiliser may be either due to better nutritional status and hence higher stress tolerance, or due to partitioning between above and below-ground sinks.</description><identifier>ISSN: 0032-079X</identifier><identifier>EISSN: 1573-5036</identifier><identifier>DOI: 10.1007/s11104-017-3354-2</identifier><language>eng</language><publisher>Cham: Springer</publisher><subject>Agroforestry ; Agronomy ; Biomedical and Life Sciences ; Cellulase ; Chitinase ; Chlorophyll ; Drought ; Droughts ; Ecology ; Ectomycorrhizas ; Enzymatic activity ; Extracellular matrix ; Fertilization ; Fertilizers ; Gas exchange ; Health aspects ; Labeling ; Life Sciences ; Nitrogen ; Nitrogen fertilizers ; Nutritional status ; Peptidase ; Phosphate fertilizers ; Phosphorus ; Photosynthesis ; Plant Physiology ; Plant Sciences ; Poplar ; Populus ; Recovery ; Regular Article ; Sinkholes ; Soil Science & Conservation ; Source-sink relationships ; Tips</subject><ispartof>Plant and soil, 2017-10, Vol.419 (1/2), p.405-422</ispartof><rights>Springer International Publishing AG, part of Springer Nature 2017</rights><rights>Springer International Publishing AG 2017</rights><rights>COPYRIGHT 2017 Springer</rights><rights>Plant and Soil is a copyright of Springer, (2017). All Rights Reserved.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c377t-289326a8e5e7e279e0a7ce2520831e107c1c5cea5184c82b5f83d4650b7468c93</citedby><cites>FETCH-LOGICAL-c377t-289326a8e5e7e279e0a7ce2520831e107c1c5cea5184c82b5f83d4650b7468c93</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.jstor.org/stable/pdf/26651522$$EPDF$$P50$$Gjstor$$H</linktopdf><linktohtml>$$Uhttps://www.jstor.org/stable/26651522$$EHTML$$P50$$Gjstor$$H</linktohtml><link.rule.ids>314,777,781,800,27905,27906,41469,42538,51300,57998,58231</link.rule.ids></links><search><creatorcontrib>Nickel, U. T.</creatorcontrib><creatorcontrib>Winkler, J. B.</creatorcontrib><creatorcontrib>Mühlhans, S.</creatorcontrib><creatorcontrib>Buegger, F.</creatorcontrib><creatorcontrib>Munch, J. C.</creatorcontrib><creatorcontrib>Pritsch, K.</creatorcontrib><title>Nitrogen fertilisation reduces sink strength of poplar ectomycorrhizae during recovery after drought more than phosphorus fertilisation</title><title>Plant and soil</title><addtitle>Plant Soil</addtitle><description>Background and aims Drought reduces the carbon (C) flux from leaves (source) to mycorrhizal roots (sink); however, during recovery from drought, C flux exceeds the levels observed in irrigated controls. This process could be source- or sink-controlled. We studied this source–sink relationship in an agronomically used poplar clone grown at different levels of nitrogen (N) and phosphorus (P) fertilisation as used in silvoarable agroforestry systems. Methods We conducted a fully factorial pot experiment combining four fertiliser and two drought regimes. Gas exchange and chlorophyll and flavonol indices were regularly monitored. One week after rewatering, we performed 13CO2 pulse labelling. At harvest, enzyme activities of ectomycorrhizal root tips were determined. Results After one week of recovery, we observed an excess in C allocation to ectomycorrhizae (ECM) in non-N-fertilised treatments. However, net photosynthesis only recovered to the level of continuously irrigated controls. Drought increased chitinase, cellulase, phosphatase and peptidase activities, but the latter only in N-fertilised treatments. Conclusions We add evidence that the allocation of recently assimilated C is most likely sink-controlled. Less C allocation to recovering ECM supplied with fertiliser may be either due to better nutritional status and hence higher stress tolerance, or due to partitioning between above and below-ground sinks.</description><subject>Agroforestry</subject><subject>Agronomy</subject><subject>Biomedical and Life Sciences</subject><subject>Cellulase</subject><subject>Chitinase</subject><subject>Chlorophyll</subject><subject>Drought</subject><subject>Droughts</subject><subject>Ecology</subject><subject>Ectomycorrhizas</subject><subject>Enzymatic activity</subject><subject>Extracellular matrix</subject><subject>Fertilization</subject><subject>Fertilizers</subject><subject>Gas exchange</subject><subject>Health aspects</subject><subject>Labeling</subject><subject>Life Sciences</subject><subject>Nitrogen</subject><subject>Nitrogen fertilizers</subject><subject>Nutritional status</subject><subject>Peptidase</subject><subject>Phosphate fertilizers</subject><subject>Phosphorus</subject><subject>Photosynthesis</subject><subject>Plant Physiology</subject><subject>Plant Sciences</subject><subject>Poplar</subject><subject>Populus</subject><subject>Recovery</subject><subject>Regular Article</subject><subject>Sinkholes</subject><subject>Soil Science & Conservation</subject><subject>Source-sink relationships</subject><subject>Tips</subject><issn>0032-079X</issn><issn>1573-5036</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><recordid>eNp9kc2KFTEQhYM44HX0AVwIAdc95j_dy2HwDwbdODC7kElXd-d6b6etpIU7L-Brm0uL6EaKUCScL6eoQ8grzq44Y_Zt5pwz1TBuGym1asQTsuPaykYzaZ6SHWNSNMx298_I85z37HznZkd-fo4F0wgzHQBLPMTsS0wzRejXAJnmOH-juSDMY5loGuiSloNHCqGk4ykkxCk-eqD9inEeKxbSD8AT9UMBpD2mdZwKPSYEWiY_02VKuR5c87-GL8jF4A8ZXv7ul-Tu_buvNx-b2y8fPt1c3zZBWlsa0XZSGN-CBgvCdsC8DSC0YK3kwJkNPOgAXvNWhVY86KGVvTKaPVhl2tDJS_Jm-3fB9H2FXNw-rThXS8c7I7k1nTVVdbWpRn8AF-chFfShVg_HGNIMQ6zv15orpTrRqQrwDQiYckYY3ILx6PHkOHPngNwWkKsBuXNATlRGbExezrsD_GuU_0CvN2ifS8I_LsIYzbUQ8hfFkJ_f</recordid><startdate>20171001</startdate><enddate>20171001</enddate><creator>Nickel, U. 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T.</au><au>Winkler, J. B.</au><au>Mühlhans, S.</au><au>Buegger, F.</au><au>Munch, J. C.</au><au>Pritsch, K.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Nitrogen fertilisation reduces sink strength of poplar ectomycorrhizae during recovery after drought more than phosphorus fertilisation</atitle><jtitle>Plant and soil</jtitle><stitle>Plant Soil</stitle><date>2017-10-01</date><risdate>2017</risdate><volume>419</volume><issue>1/2</issue><spage>405</spage><epage>422</epage><pages>405-422</pages><issn>0032-079X</issn><eissn>1573-5036</eissn><abstract>Background and aims Drought reduces the carbon (C) flux from leaves (source) to mycorrhizal roots (sink); however, during recovery from drought, C flux exceeds the levels observed in irrigated controls. This process could be source- or sink-controlled. We studied this source–sink relationship in an agronomically used poplar clone grown at different levels of nitrogen (N) and phosphorus (P) fertilisation as used in silvoarable agroforestry systems. Methods We conducted a fully factorial pot experiment combining four fertiliser and two drought regimes. Gas exchange and chlorophyll and flavonol indices were regularly monitored. One week after rewatering, we performed 13CO2 pulse labelling. At harvest, enzyme activities of ectomycorrhizal root tips were determined. Results After one week of recovery, we observed an excess in C allocation to ectomycorrhizae (ECM) in non-N-fertilised treatments. However, net photosynthesis only recovered to the level of continuously irrigated controls. Drought increased chitinase, cellulase, phosphatase and peptidase activities, but the latter only in N-fertilised treatments. Conclusions We add evidence that the allocation of recently assimilated C is most likely sink-controlled. Less C allocation to recovering ECM supplied with fertiliser may be either due to better nutritional status and hence higher stress tolerance, or due to partitioning between above and below-ground sinks.</abstract><cop>Cham</cop><pub>Springer</pub><doi>10.1007/s11104-017-3354-2</doi><tpages>18</tpages></addata></record> |
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| subjects | Agroforestry Agronomy Biomedical and Life Sciences Cellulase Chitinase Chlorophyll Drought Droughts Ecology Ectomycorrhizas Enzymatic activity Extracellular matrix Fertilization Fertilizers Gas exchange Health aspects Labeling Life Sciences Nitrogen Nitrogen fertilizers Nutritional status Peptidase Phosphate fertilizers Phosphorus Photosynthesis Plant Physiology Plant Sciences Poplar Populus Recovery Regular Article Sinkholes Soil Science & Conservation Source-sink relationships Tips |
| title | Nitrogen fertilisation reduces sink strength of poplar ectomycorrhizae during recovery after drought more than phosphorus fertilisation |
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