Short-term reoxygenation is not enough for the recovery of soybean plants exposed to saline waterlogging.

Autor: Martins TDS; Departamento de Botânica, Universidade Federal de Pelotas, Capão Do Leão, 96160-000, Brazil; Laboratory of Crop Physiology, Department of Plant Biology, Institute of Biology, State University of Campinas (UNICAMP), Campinas, SP, Brazil. Electronic address: t184099@dac.unicamp.br., Da-Silva CJ; Departamento de Botânica, Universidade Federal de Pelotas, Capão Do Leão, 96160-000, Brazil; Department of Horticultural Science, North Carolina State University, Raleigh, 27607, USA. Electronic address: cjdasilv@ncsu.edu., Shimoia EP; Departamento de Botânica, Universidade Federal de Pelotas, Capão Do Leão, 96160-000, Brazil., Posso DA; Departamento de Botânica, Universidade Federal de Pelotas, Capão Do Leão, 96160-000, Brazil., Carvalho IR; Departamento de Estudos Agrários, Universidade Regional Do Noroeste Do Estado Do Rio Grande Do Sul, Ijuí, 98700-000, Brazil., Barneche de Oliveira AC; Empresa Brasileira de Pesquisa Agropecuária, Embrapa Clima Temperado, Pelotas 96010-971, Brazil., Amarante LD; Departamento de Botânica, Universidade Federal de Pelotas, Capão Do Leão, 96160-000, Brazil.
Jazyk: angličtina
Zdroj: Plant physiology and biochemistry : PPB [Plant Physiol Biochem] 2024 Dec; Vol. 217, pp. 109221. Date of Electronic Publication: 2024 Oct 19.
DOI: 10.1016/j.plaphy.2024.109221
Abstrakt: The ability of plants to recover after stressful events is crucial for resuming growth and development and is a key trait when studying stress tolerance. However, there is a lack of information on the physiological responses and the time required to restore homeostasis after the stress experience. This study aimed to (i) enhance understanding of soybean photosynthesis performance during saline waterlogging and (ii) investigate the effects of this combined stress during the reoxygenation and recovery period. Soybean plants (cultivar PELBR10-6049 RR) were subjected to waterlogging, NaCl, or hypoxia + NaCl for 3 and 6 days. Afterward, plants were drained and allowed to recover for an additional two (short-term) and seven days (long-term). Compared to plants exposed to single stress, the combined hypoxia + NaCl treatment resulted in a lower net CO 2 assimilation rate, ФPSII, and levels of photosynthetic pigments during the waterlogging period. Furthermore, hypoxia + NaCl increased foliar electrolyte leakage during waterlogging. In response to short-term reoxygenation, these negative effects were amplified, while prolonged reoxygenation resulted in a slight increase in biomass accumulation. In conclusion, full recovery was not achieved under any condition during the reoxygenation periods tested. Notably, the brief reoxygenation phase imposed greater stress than the initial stress conditions for plants facing combined stress. Although extended recovery increased biomass accumulation, it remained lower in plants previously subjected to saline waterlogging.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier Masson SAS. All rights reserved.)
Databáze: MEDLINE
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