Growth of the C 4 dicot Flaveria bidentis: photosynthetic acclimation to low light through shifts in leaf anatomy and biochemistry
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Pengelly, Jasper; Sirault, Xavier R.R; Tazoe, Youshi; Evans, John; Furbank, Robert Thomas; von Caemmerer, Susanne
Description
In C4 plants, acclimation to growth at low irradiance by means of anatomical and biochemical changes to leaf tissue is considered to be limited by the need for a close interaction and coordination between bundle sheath and mesophyll cells. Here differences in relative growth rate (RGR), gas exchange, carbon isotope discrimination, photosynthetic enzyme activity, and leaf anatomy in the C4 dicot Flaveria bidentis grown at a low (LI; 150μmol quanta m2 s-1) and medium (MI; 500μmol quanta m 2 s-1)...[Show more]
dc.contributor.author | Pengelly, Jasper | |
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dc.contributor.author | Sirault, Xavier R.R | |
dc.contributor.author | Tazoe, Youshi | |
dc.contributor.author | Evans, John | |
dc.contributor.author | Furbank, Robert Thomas | |
dc.contributor.author | von Caemmerer, Susanne | |
dc.date.accessioned | 2015-12-07T22:19:47Z | |
dc.identifier.issn | 0022-0957 | |
dc.identifier.uri | http://hdl.handle.net/1885/19507 | |
dc.description.abstract | In C4 plants, acclimation to growth at low irradiance by means of anatomical and biochemical changes to leaf tissue is considered to be limited by the need for a close interaction and coordination between bundle sheath and mesophyll cells. Here differences in relative growth rate (RGR), gas exchange, carbon isotope discrimination, photosynthetic enzyme activity, and leaf anatomy in the C4 dicot Flaveria bidentis grown at a low (LI; 150μmol quanta m2 s-1) and medium (MI; 500μmol quanta m 2 s-1) irradiance and with a 12h photoperiod over 36d were examined. RGRs measured using a 3D non-destructive imaging technique were consistently higher in MI plants. Rates of CO2 assimilation per leaf area measured at 1500μmmol quanta m2 s-1 were higher for MI than LI plants but did not differ on a mass basis. LI plants had lower Rubisco and phosphoenolpyruvate carboxylase activities and chlorophyll content on a leaf area basis. Bundle sheath leakiness of CO2 (φ) calculated from real-time carbon isotope discrimination was similar for MI and LI plants at high irradiance. φ increased at lower irradiances, but more so in MI plants, reflecting acclimation to low growth irradiance. Leaf thickness and vein density were greater in MI plants, and mesophyll surface area exposed to intercellular airspace (Sm) and bundle sheath surface area per unit leaf area (Sb) measured from leaf cross-sections were also both significantly greater in MI compared with LI leaves. Both mesophyll and bundle sheath conductance to CO2 diffusion were greater in MI compared with LI plants. Despite being a C4 species, F. bidentis is very plastic with respect to growth irradiance. | |
dc.publisher | Oxford University Press | |
dc.source | Journal of Experimental Botany | |
dc.subject | Keywords: Dicotyledoneae; Flaveria; Flaveria bidentis; carbon; carbon dioxide; chlorophyll; ribulosebisphosphate carboxylase; acclimatization; angiosperm; article; chemistry; Flaveria; growth, development and aging; histology; light; light harvesting system; metabo C4 photosynthesis; carbon isotope discrimination; CO2 leakiness; Flaveria bidentis; gas exchange; image analysis; leaf anatomy. | |
dc.title | Growth of the C 4 dicot Flaveria bidentis: photosynthetic acclimation to low light through shifts in leaf anatomy and biochemistry | |
dc.type | Journal article | |
local.description.notes | Imported from ARIES | |
local.identifier.citationvolume | 61 | |
dc.date.issued | 2010 | |
local.identifier.absfor | 060705 - Plant Physiology | |
local.identifier.ariespublication | u4956746xPUB8 | |
local.type.status | Published Version | |
local.contributor.affiliation | Pengelly, Jasper, College of Medicine, Biology and Environment, ANU | |
local.contributor.affiliation | Sirault, Xavier R.R, CSIRO Plant Industry | |
local.contributor.affiliation | Tazoe, Youshi, College of Medicine, Biology and Environment, ANU | |
local.contributor.affiliation | Evans, John, College of Medicine, Biology and Environment, ANU | |
local.contributor.affiliation | Furbank, Robert Thomas, CSIRO Division of Plant Industry | |
local.contributor.affiliation | von Caemmerer, Susanne, College of Medicine, Biology and Environment, ANU | |
local.description.embargo | 2037-12-31 | |
local.bibliographicCitation.issue | 14 | |
local.bibliographicCitation.startpage | 4109 | |
local.bibliographicCitation.lastpage | 4122 | |
local.identifier.doi | 10.1093/jxb/erq226 | |
local.identifier.absseo | 970106 - Expanding Knowledge in the Biological Sciences | |
dc.date.updated | 2016-02-24T11:29:32Z | |
local.identifier.scopusID | 2-s2.0-77956572329 | |
local.identifier.thomsonID | 000281717300025 | |
Collections | ANU Research Publications |
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