{"id":2075,"date":"2024-10-23T10:24:03","date_gmt":"2024-10-23T09:24:03","guid":{"rendered":"https:\/\/research.reading.ac.uk\/lemontree\/?p=2075"},"modified":"2024-10-23T10:24:03","modified_gmt":"2024-10-23T09:24:03","slug":"nitrogen-demand-availability-and-acquisition-strategy-control-plant-responses-to-elevated-co2","status":"publish","type":"post","link":"https:\/\/research.reading.ac.uk\/lemontree\/nitrogen-demand-availability-and-acquisition-strategy-control-plant-responses-to-elevated-co2\/","title":{"rendered":"Nitrogen demand, availability, and acquisition strategy control plant responses to elevated CO2"},"content":{"rendered":"
\n\n\n\n\n\n\n
Experiment Title:<\/strong><\/span><\/td>\n\u201cNitrogen demand, availability, and acquisition strategy control plant responses to elevated CO2\u201d<\/span><\/td>\nInstitutions responsible: <\/strong><\/span><\/p>\n

Texas Tech University<\/span><\/td>\n<\/tr>\n

Experiment Description:<\/strong><\/span><\/td>\nGrowth chamber pot experiment investigating the effects of nitrogen acquisition strategy and nitrogen availability on leaf and whole-plant responses to elevated atmospheric CO2 concentrations. Glycine max<\/em> seedlings were grown under one of nine soil nitrogen fertilization treatments (0-630 ppm N), one of two atmospheric CO2 treatments (420, 1000 ppm CO2), and one of two inoculation treatments with symbiotic nitrogen-fixing bacteria (no inoculation, inoculation with Bradyrhizobium japonicum<\/em>) in a full-factorial design. Leaf physiology and whole-plant traits were measured 7 weeks after experiment initiation.<\/span><\/td>\n<\/tr>\n
Variables being tested<\/strong>:<\/span><\/td>\nExperimental Details <\/strong>(factorial design, replication, lab\/field\/ controls, vegetation type):<\/span><\/td>\nData availability:<\/strong><\/span><\/td>\nStudy limitations<\/strong>:<\/span><\/td>\n<\/tr>\n
At least 30 leaf and whole-plant traits collected. Some notable traits include:<\/span><\/p>\n
    \n
  • Carbon costs to acquire nitrogen (root carbon biomass per unit whole-plant nitrogen biomass)<\/span><\/li>\n
  • Total leaf area<\/span><\/li>\n
  • Organ allocation fractions (i.e. leaf mass fraction, stem mass fraction, root mass fraction)<\/span><\/li>\n
  • Anet (both under common CO2, 420ppm, and under growth CO2 concentration)<\/span><\/li>\n
  • Stomatal conductance<\/span><\/li>\n
  • Vcmax25<\/span><\/li>\n
  • Jmax25<\/span><\/li>\n
  • Jmax25:Vcmax25<\/span><\/li>\n
  • Cost to acquire and use nitrogen relative to water (i.e. \u03b2, calculated from leaf d13C)<\/span><\/li>\n
  • Leaf Ci:Ca, calculated through leaf d13C (i.e. \u03c7)<\/span><\/li>\n
  • Leaf nitrogen per unit leaf area (Narea)<\/span><\/li>\n
  • Leaf nitrogen per unit leaf biomass (Nmass)<\/span><\/li>\n
  • Leaf dry biomass per unit leaf area (LMA\/Marea)<\/span><\/li>\n
  • Percent nitrogen fixed from the atmosphere (derived from leaf d15N)<\/span><\/li>\n
  • Root nodule biomass<\/span><\/li>\n
  • Root nodule biomass:root biomass<\/span><\/li>\n<\/ul>\n<\/td>\n
Growth chamber pot experiment. Glycine max<\/em> grown under 16:8 light:dark photoperiod with 3 hour ramp between full light and dark conditions. Daytime temperatures set to 25degC and nighttime temperatures set to 17degC. Relative humidity was 50% throughout the day and night. Fertilization treatments added as modified Hoagland\u2019s solutions such that nitrogen was the only macronutrient or micronutrient modified across fertilization treatments<\/span><\/td>\nData are available on Zenodo: here<\/a><\/span><\/p>\n

A preprint for the paper is also available: here<\/a><\/span><\/p>\n

 <\/p>\n

 <\/td>\n

Carbon costs to acquire nitrogen do not include carbon allocated belowground through root exudates or lost through root exudation<\/span><\/p>\n

 <\/p>\n

Short-term pot experiment- not equipped to answer questions about any long-term effects of nitrogen availability or acquisition strategy on plant responses to elevated CO2<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/blockquote>\n","protected":false},"excerpt":{"rendered":"

Experiment Title: \u201cNitrogen demand, availability, and acquisition strategy control plant responses to elevated CO2\u201d Institutions responsible: Texas Tech University Experiment Description: Growth chamber pot experiment investigating the effects of nitrogen…Read More ><\/a><\/p>\n","protected":false},"author":959,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"__cvm_playback_settings":[],"__cvm_video_id":"","footnotes":""},"categories":[92],"tags":[],"coauthors":[88],"class_list":["post-2075","post","type-post","status-publish","format-standard","hentry","category-experiment"],"acf":[],"yoast_head":"\nNitrogen demand, availability, and acquisition strategy control plant responses to elevated CO2 - Lemontree\u202f<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/research.reading.ac.uk\/lemontree\/nitrogen-demand-availability-and-acquisition-strategy-control-plant-responses-to-elevated-co2\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Nitrogen demand, availability, and acquisition strategy control plant responses to elevated CO2 - 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