| Texto completo | |
| Autor(es): |
Miranda, Marcela T.
[1, 2]
;
Espinoza-Nunez, Erick
[1, 3]
;
Silva, Simone F.
[2]
;
Boscariol-Camargo, Raquel L.
[4]
;
Machado, Eduardo C.
[1]
;
Ribeiro, V, Rafael
Número total de Autores: 6
|
| Afiliação do(s) autor(es): | [1] Agron Inst IAC, Ctr R&D Ecophysiol & Biophys, Lab Plant Physiol Coaracy M Franco, POB 28, BR-13012970 Campinas, SP - Brazil
[2] V, Univ Campinas UNICAMP, Dept Plant Biol, Lab Crop Physiol, POB 6109, BR-13083970 Campinas, SP - Brazil
[3] Univ Nacl Agr La Molina UNALM, Dept Horticultura, Lima - Peru
[4] Agron Inst IAC, Ctr Citriculture Sylvio Moreira, Lab Biotechnol, POB 04, BR-13490970 Cordeiropolis, SP - Brazil
Número total de Afiliações: 4
|
| Tipo de documento: | Artigo Científico |
| Fonte: | THEORETICAL AND EXPERIMENTAL PLANT PHYSIOLOGY; v. 34, n. 1 JAN 2022. |
| Citações Web of Science: | 0 |
| Resumo | |
Aquaporins are water channel proteins that facilitate water transport through the transcellular pathway, a route with high resistance due to lipid bilayer membranes. Aquaporins occur as multiple isoforms and plasma membrane aquaporins (PIPs) are known to modulate plant responses to abiotic stress such as drought. Previous studies have reported changes in PIPs expression in roots of Citrus plants under abiotic stresses; however, such changes are limited to grafted citrus trees with plant responses to environmental stresses being driven by two species. Therefore, the ability of a given Citrus species-i.e., non-grafted Citrus saplings-in modulating aquaporin expression under water deficit remains unknown. This study aimed to evaluate how water deficit changes aquaporin expression (PIP1; PIP2.1; and PIP2.5) and leaf gas exchange of saplings of three Citrus species: `Mandarin' lime, `Swingle' citrumelo and `Valencia' sweet orange. Root aquaporin expression did not vary under water deficit or among species, but the predawn leaf water potential of `Valencia' sweet orange was reduced due to water deficit. Decreases in stomatal conductance were found in all species under water deficit, which were associated with reduced PIP2.1 expression in leaves. However, `Mandarin' lime exhibited the largest reduction in stomatal conductance and significant gene repression of not only PIP2.1 but also PIP2.5 in leaves under water deficit. `Mandarin' lime is known as a drought tolerant rootstock widely used in citriculture and our data suggest that this rootstock presents a fast-response mechanism against drought based on stomatal closure associated with downregulation of PIP2.1 and PIP2.5 in leaves. (AU) | |
| Processo FAPESP: | 18/09834-5 - Vulnerabilidade ao embolismo em espécies cítricas: características hidráulicas, variação sazonal e relações entre copa e porta-enxerto |
| Beneficiário: | Marcela Trevenzoli Miranda |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |
| Processo FAPESP: | 11/16263-5 - Papel do porta-enxerto na tolerância à seca: sinalização, relações hídricas, fotossíntese e crescimento |
| Beneficiário: | Erick Espinoza Nuñez |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |
| Processo FAPESP: | 19/15276-8 - Vulnerabilidade ao embolismo em espécies cítricas: características hidráulicas, variação sazonal e relações entre copa e porta-enxerto |
| Beneficiário: | Eduardo Caruso Machado |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |