| Full text | |
| Author(s): |
Martins, Tamires Da Silva
;
Filho, Jose R. Magalhaes
;
Cruz, Larissa Prado
;
Machado, Daniela F. S. P.
;
Erismann, Norma M.
;
Gondim-Tomaz, Rose M. A.
;
Marchiori, Paulo E. R.
;
Silva, Andre L. B. O.
;
Machado, Eduardo Caruso
;
Ribeiro, Rafael Vasconcelos
Total Authors: 10
|
| Document type: | Journal article |
| Source: | EXPERIMENTAL AGRICULTURE; v. 60, p. 18-pg., 2024-05-14. |
| Abstract | |
Sucrose yield in sugarcane is a complex process regulated by both environmental and endogenous factors. However, the metabolic balance driving vegetative growth and sucrose accumulation remains poorly understood. Herein, we carried out a comprehensive assessment of carbohydrate dynamics throughout the crop cycle in two sugarcane varieties varying in biomass production, evaluating the carbon metabolism in both leaves and stalks. Our data revealed that the decline in photosynthetic rates during sugarcane maturation is associated not only to accumulation of sugars in leaves but also due to stomatal and non-stomatal limitations. We found that metabolic processes in leaves and stalks were intrinsically linked. While IACSP94-2094 had higher stalk sucrose concentration than IACSP95-5000, this latter produced more biomass. Compared to IACSP95-5000, IACSP94-2094 showed higher sucrose phosphate synthase (SPS) activity in leaves and stalks, along with lower soluble acid invertase (SAI) activity in leaves during the maximum growth stage. Interestingly, IACSP94-2094 also exhibited higher stalk SPS activity and lower stalk SAI activity than IACSP95-5000 during maturation. High biomass production by IACSP95-5000 was associated with higher sucrose synthase (SuSy) and SAI activity in leaves and higher SuSy and soluble neutral invertase (SNI) activity in stalks when compared to IACSP94-2094 during the maximum growth. Despite the contrasting strategies, both varieties displayed similar total sucrose yield, a balance between sucrose concentration and biomass production. This phenomenon implies the presence of a compensatory mechanism in sugarcane, with high biomass production compensating low sucrose accumulation and vice versa. (AU) | |
| FAPESP's process: | 14/12969-9 - "Under abiotic stress, do the root to shoot communication, the carbon and oxidative metabolism affect the sugarcane cultivars tolerance?" |
| Grantee: | Daniela Favero São Pedro Machado |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 22/09154-0 - Carbon and nitrogen metabolism in energy cane and sugarcane under water deficit and low temperature |
| Grantee: | Tamires da Silva Martins |
| Support Opportunities: | Scholarships in Brazil - Doctorate |
| FAPESP's process: | 08/57495-3 - Integrating physiological, morphological and anatomical traits to understand the differential sucrose yield in sugarcane genotypes |
| Grantee: | Eduardo Caruso Machado |
| Support Opportunities: | Program for Research on Bioenergy (BIOEN) - Thematic Grants |