5 documents found, page 1 of 1
Integration of C1 and C2 metabolism in trees
Jardine, Kolby J.; Souza, Vinícius Fernandes de; Oikawa, Patricia Yoshino; Higuchi, Niro; Bill, Markus; Porras, Rachel C.; Niinemets, ÜloC1 metabolism in plants is known to be involved in photorespiration, nitrogen and amino acid metabolism, as well as methylation and biosynthesis of metabolites and biopolymers. Although the flux of carbon through the C1 pathway is thought to be large, its intermediates are difficult to measure and relatively little is known about this potentially ubiquitous pathway. In this study, we evaluated the C1 pathway an...
Green leaf volatile emissions during high temperature and drought stress in a c...
Jardine, Kolby J.; Chambers, Jeffrey Quintin; Holm, Jennifer A.; Jardine, Angela B.; Fontes, Clarissa Gouveia; Zorzanelli, Raquel F.Prolonged drought stress combined with high leaf temperatures can induce programmed leaf senescence involving lipid peroxidation, and the loss of net carbon assimilation during early stages of tree mortality. Periodic droughts are known to induce widespread tree mortality in the Amazon rainforest, but little is known about the role of lipid peroxidation during drought-induced leaf senescence. In this study, we ...
Reassimilation of leaf internal CO2 contributes to isoprene emission in the neo...
Garcia, Sabrina; Jardine, Kolby J.; Souza, Vinícius Fernandes de; Souza, Rodrigo Augusto Ferreira de; Duvoisin Júnior, SérgioIsoprene (C5H8) is a hydrocarbon gas emitted by many tree species and has been shown to protect photosynthesis under abiotic stress. Under optimal conditions for photosynthesis, ~70%-90% of carbon used for isoprene biosynthesis is produced fromrecently assimilated atmospheric CO2. While the contribution of alternative carbon sources that increase with leaf temperature and other stresses have been demonstrated, ...
Alternative carbon sources for isoprene Emission
Araújo, Wagner L.; Souza, Vinícius Fernandes de; Niinemets, Ülo; Rasulov, Bahtijor; Vickers, Claudia E.; Duvoisin Júnior, SergioIsoprene and other plastidial isoprenoids are produced primarily from recently assimilated photosynthates via the 2-C-methyl-D-erythritol 4-phosphate (MEP) pathway. However, when environmental conditions limit photosynthesis, a fraction of carbon for MEP pathway can come from extrachloroplastic sources. The flow of extrachloroplastic carbon depends on the species and on leaf developmental and environmental cond...
Estimating the IAF of coffee from the volume occupied by leaves and plant archi...
Barbosa, João Paulo Rodrigues Alves Delfino; Martins, Giordane Augusto; Ferreira, Rafael Teixeira; Pennacchi, João Paulo; Souza, Vinícius Fernandes deThe methods used for estimating the leaf area index (LAI) of coffee (Coffea arabica L.) show limitations related to therepresentation of some aspects of coffee crops, affecting the LAI in time and space. This work was developed to propose a method forassessing the LAI of coffee aiming to reduce those limitations. We studied plants in the production phase of the Mundo Novo and Catuaívarieties, in plantations loc...