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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Nitrogen supply influences photosynthesis establishment along the sugarcane leaf

Full text
Author(s):
Bassi, Denis [1] ; Menossi, Marcelo [1] ; Mattiello, Lucia [1]
Total Authors: 3
Affiliation:
[1] Univ Estadual Campinas, Inst Biol, Dept Genet Evolucao Microbiol & Imunol, BR-13083862 Campinas, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: SCIENTIFIC REPORTS; v. 8, FEB 2 2018.
Web of Science Citations: 12
Abstract

Nitrogen (N) is a major component of the photosynthetic apparatus and is widely used as a fertilizer in crops. However, to the best of our knowledge, the dynamic of photosynthesis establishment due to differential N supply in the bioenergy crop sugarcane has not been reported to date. To address this question, we evaluated physiological and metabolic alterations along the sugarcane leaf in two contrasting genotypes, responsive (R) and nonresponsive (NR), grown under high- and low-N conditions. We found that the N supply and the responsiveness of the genotype determined the degree of senescence, the carboxylation process mediated by phosphoenolpyruvate carboxylase (PEPcase) and differential accumulation of soluble sugars. The metabolite profiles indicated that the NR genotype had a higher respiration rate in the youngest tissues after exposure to high N. We observed elevated levels of metabolites related to photosynthesis in almost all leaf segments from the R genotype under high-N conditions, suggesting that N supply and the ability to respond to N influenced photosynthesis. Therefore, we observed that N influence on photosynthesis and other pathways is dependent on the genotype and the leaf region. (AU)

FAPESP's process: 14/03562-2 - Physiological, transcriptional and metabolites analysis of different developmental stages of sugarcane leaf +1
Grantee:Denis Bassi
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 12/23345-0 - Comparative analysis of physiological parameters and transcriptional profile of different developmental stages of leaf +1 in sugarcane
Grantee:Lucia Mattiello
Support Opportunities: Program for Research on Bioenergy (BIOEN) - Regular Program Grants