| Texto completo | |
| Autor(es): |
da Silva, Elania Freire
;
Santos, Hugo Rafael Bentzen
;
Ometto, Jean Pierre Henry Balbaud
;
Jardim, Alexandre Manitoba da Rosa Ferraz
;
da Silva, Thieres George Freire
;
Herminioa, Pedro Jose
;
Simoes, Adriano Nascimento
;
Souza, Eduardo
;
Ferreira-Silva, Sergioluiz
Número total de Autores: 9
|
| Tipo de documento: | Artigo Científico |
| Fonte: | CURRENT PLANT BIOLOGY; v. 37, p. 15-pg., 2024-01-14. |
| Resumo | |
This study tests the hypothesis that a more salt-excluder rootstock can attenuate salt stress in grapevine plants by enhancing photosynthesis and providing ionic and oxidative protection. Plants of 'BRS Vit ' oria' variety, grafted with the rootstocks IAC 313 (salt-excluder) and SO4, were subjected to salinity by adding NaCl (0, 50, and 100 mM) for 30 days. Plants with SO4 showed more severe salt toxicity symptoms in leaves and lower chlorophyll content under salinity. Conversely, plants with IAC 313 showed improved photosynthesis and stomatal conductance, along with higher carboxylation efficiency under salt compared to SO4. Under salinity, plants with SO4 showed higher losses of K+ in stems, roots, and petioles, as well as increased accumulation of Na+ in these organs, relative to IAC 313. Furthermore, plants with IAC 313 had lower leaf Na+ content under salinity and reduced leaf Cl- content at 50 mM NaCl, a response associated with a higher Na+ allocation in petioles of IAC 313. At 50 mM, IAC 313 exhibited better photochemical activity, as indicated by electron transport rate and nonphotochemical quenching. However, at 100 mM, both rootstocks showed similar trends, suggesting that the photosynthetic restriction was primarily due to stomatal disturbances. Plants with IAC 313 showed better APX activity and ascorbate balance under salinity. IAC 313 showed more salt-resistance traits than SO4, although the growth was similarly affected in both rootstocks. This response could be due to the reduced time of salt treatment (30 days). In summary, our data indicate that IAC 313 rootstock possesses better salt tolerance traits than SO4. (AU) | |
| Processo FAPESP: | 17/22269-2 - Transição para sustentabilidade e o nexo água-agricultura-energia: explorando uma abordagem integradora com casos de estudo nos biomas Cerrado e Caatinga |
| Beneficiário: | Jean Pierre Henry Balbaud Ometto |
| Modalidade de apoio: | Auxílio à Pesquisa - Programa de Pesquisa sobre Mudanças Climáticas Globais - Temático |
| Processo FAPESP: | 23/05323-4 - Fenologia vegetal e informações ambientais para biodiversidade e mudanças climáticas |
| Beneficiário: | Alexandre Maniçoba da Rosa Ferraz Jardim |
| Modalidade de apoio: | Bolsas no Brasil - Programa Capacitação - Treinamento Técnico |