| Texto completo | |
| Autor(es): |
Miranda, Marcela T.
[1, 2]
;
Da Silva, Simone F.
[2]
;
Silveira, Neidiquele M.
[1]
;
Pereira, Luciano
[1, 2]
;
Machado, Eduardo C.
[1]
;
Ribeiro, Rafael V.
[2]
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] Univ Campinas UNICAMP, Inst Biol, Lab Crop Physiol, Dept Plant Biol, POB 6109, BR-13083970 Campinas, SP - Brazil
Número total de Afiliações: 2
|
| Tipo de documento: | Artigo Científico |
| Fonte: | JOURNAL OF PLANT GROWTH REGULATION; v. 40, n. 1, p. 11-19, FEB 2021. |
| Citações Web of Science: | 5 |
| Resumo | |
Drought tolerance is defined by several morpho-physiological mechanisms that together improve plant development under water-limiting conditions. Previously, we found root hydraulic redistribution is one of those mechanisms for water stress avoidance. Herein, we aimed to verify the physiological mechanisms associated with root hydraulic redistribution and its consequences for leaf gas exchange and plant growth. Valencia sweet orange scions were grafted onto either Rangpur lime or Swingle citrumelo rootstock. Each plant had two root systems of the same rootstock in distinct pots, which allowed partial irrigation. Our results revealed that citrus species redistribute water under drought and this varies when comparing rootstocks, with Rangpur lime showing higher ability to redistribute water than Swingle citrumelo. For the first time, root hydraulic redistribution in Rangpur lime was associated with osmotic adjustment in well-watered roots of plants facing water deficit. Rangpur lime also presented an effective stomatal regulation of water loss and decreases in leaf transpiration likely allowed water transport to roots under water deficit. As conclusion, we found that root hydraulic redistribution, osmotic adjustment and stomatal control of leaf gas exchange are important physiological mechanisms associated with drought tolerance induced by Rangpur lime rootstock. (AU) | |
| Processo FAPESP: | 16/02199-7 - Redistribuição de água pelas raízes de citros sob déficit hídrico |
| Beneficiário: | Marcela Trevenzoli Miranda |
| Modalidade de apoio: | Bolsas no Brasil - Mestrado |
| Processo FAPESP: | 17/14075-3 - Novos métodos para estudo das propriedades hidráulicas do xilema e embolismo in vivo em plantas |
| Beneficiário: | Luciano Pereira |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |
| Processo FAPESP: | 15/14817-4 - O papel do porta-enxerto no metabolismo e transporte de carboidratos em espécies de citros sob déficit hídrico |
| Beneficiário: | Simone Ferreira da Silva |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |
| Processo FAPESP: | 16/11906-9 - O metabolismo de carboidratos e a tolerância à seca em citros |
| Beneficiário: | Eduardo Caruso Machado |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |