Extensive sucrose cycling through the fructan pool of a C3 grass across a 200 to 800 μmol mol-1 atmospheric CO2 gradient

Clicks: 21
ID: 317564
2026
Free PDF
Article Quality & Performance Metrics
Overall Quality
Not rated
Combines reader engagement with the AI quality analysis. This article has not been analysed, so there is no overall score — reader engagement is measured and shown alongside.
AI Quality Assessment
Not analyzed
Readership in this journal
Steady

Ranked #303 of 657 articles by views in Plant physiology and biochemistry : PPB

Most read Least read

Bar heights use a square-root scale. Only the 120 most-read articles are drawn; the journal has 657 in total.

Mint this article as an NFT
Not yet minted

Create a permanent, verifiable on-chain record of this article on the Scimatic Network. The NFT is held in your Journament account, and you can withdraw it to your own wallet at any time.

5 SUSD one-off · no wallet required
Sign in to mint
Abstract
Abstract Fructan stores constitute the most important reserve carbohydrate pools of cool season (C3) grasses, but it is largely unknown how the variation of atmospheric CO2 concentration ([CO2]) between past and projected future levels affects their function in source (photosynthesis) – sink (growth and respiration) relationships. This study addressed this question with perennial ryegrass (Lolium perenne L.) grown at [CO2] of 200, 400 or 800 μmol mol-1 with growth-limiting nitrogen fertilization. Sixty-six days-old vegetative stands were labelled with 13CO2/12CO2 mixtures for 7 days and the 13C-tracer dynamics in whole-shoot sucrose, fructans, glucose and fructose pools evaluated with a four-pool compartmental model of central carbohydrate metabolism. Increasing [CO2] from 200 to 800 μmol mol-1 increased shoot mass 1.6-fold and fructan concentration from 35% to 50% of dry weight, while decreasing the nitrogen nutrition status of stands. Conversely, [CO2] had no effect on the half-lives of water-soluble carbohydrate pools (fructans, ∼7.7 days; sucrose, glucose and fructose, 2.3-4.5 hours). Carbon cycling through the fructan pool was enhanced by [CO2], increasing the mean residence time of carbon in the carbohydrate system from 9 to 14 days between 200 and 800 μmol mol-1 [CO2]. Sucrose resynthesis from breakdown products of fructans (fructose) was extensive and corresponded to 65% and 113% of concurrent sucrose neo-synthesis (or sucrose consumption in growth and respiration) at 200 and 800 μmol mol-1 [CO2], respectively. These results imply a strong constitutive buffering of sucrose availability in the source-sink system of perennial ryegrass (and likely most other C3 grasses) by fructan metabolism.
Reference Key
openalex_W7164880670 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Jianjun Zhu, C. Lehmeier, Ulrike Ostler, Regina T. Hirl, Juan C. Baca Cabrera, Rudi Schäufele, Fernando Alfredo Lattanzi, H. Schnyder
Are you one of these authors? Claim your profile
Journal Plant physiology and biochemistry : PPB
Year 2026
DOI
10.1093/plphys/kiag381
URL
https://doi.org/10.1093/plphys/kiag381
Keywords Keywords not found

Citations

No citations found. To add a citation, contact the admin at info@scimatic.org

Comments

No comments yet. Be the first to comment on this article.