| Full text | |
| Author(s): |
Sales, Cristina R. G.
[1]
;
Ribeiro, Rafael V.
[2]
;
Silveira, Joaquim A. G.
[3]
;
Machado, Eduardo C.
[1]
;
Martins, Marcio O.
[3]
;
Lagoa, Ana Maria M. A.
[1]
Total Authors: 6
|
| Affiliation: | [1] Inst Agron Estado Sao Paulo, Lab Fisiol Vegetal Coaracy M Franco, BR-13012970 Campinas, SP - Brazil
[2] Univ Estadual Campinas, Inst Biol, Dept Biol Vegetal, BR-13083970 Campinas, SP - Brazil
[3] Univ Fed Ceara, Dept Bioquim & Biol Mol, Lab Metab Plantas, BR-60455970 Fortaleza, Ceara - Brazil
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | Plant Physiology and Biochemistry; v. 73, p. 326-336, DEC 2013. |
| Web of Science Citations: | 42 |
| Abstract | |
The physiological responses of C-4 species to simultaneous water deficit and low substrate temperature are poorly understood, as well as the recovery capacity. This study investigated whether the effect of these abiotic stressors is cultivar-dependent. The differential responses of drought-resistant (IACSP94-2094) and drought-sensitive (IACSP97-7065) sugarcane cultivars were characterized to assess the relationship between photosynthesis and antioxidant protection by APX and SOD isoforms under stress conditions. Our results show that drought alone or combined with low root temperature led to excessive energetic pressure at the PSI! level. Heat dissipation was increased in both genotypes, but the high antioxidant capacity due to higher SOD and APX activities was genotype-dependent and it operated better in the drought-resistant genotype. High SOD and APX activities were associated with a rapid recovery of photosynthesis in IACSP94-2094 plants after drought and low substrate temperature alone or simultaneously. (C) 2013 Elsevier Masson SAS. All rights reserved. (AU) | |
| 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 |