ryptochrome 1a depends on blue light fluence rate to mediate osmotic stress responses in tomat

Autor(es)

D'Amico-Damiao, Victor ^[1] ; Barbosa Lucio, Jose Clebson ^[1] ; Oliveira, Reginaldo ^[1] ; Gaion, Lucas Aparecido ^[2] ; Barreto, Rafael Ferreira ^[3] ; Carvalho, Rogerio Falleiros ^[1]

Afiliação do(s) autor(es)

^[1] Sao Paulo State Univ UNESP, Dept Biol Appl Agr, BR-14884900 Jaboticabal - Brazil

^[2] Univ Marilia UNIMAR, BR-17525902 Marilia, SP - Brazil

^[3] Fed Univ Mato Grosso do Sul UFMS, BR-79560000 Chapadao Do Sul - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Plant Physiology; v. 258, MAR-APR 2021.
• Citações Web of Science: 1

Resumo

The participation of plant cryptochromes in water deficit response mechanisms has been highlighted in several reports. However, the role of tomato (Solanum lycopersicum L.) cryptochrome 1a (cry1 alpha) in the blue light fluencedependent modulation of the water deficit response remains largely elusive. The tomato cry1 alpha mutant and its wild-type counterpart were grown in water (no stress) or PEG(6000) (osmotic stress) treatments under white light (60 mu mol m(-2) s(-1)) or from low to high blue light fluence (1, 5, 10, 15 and 25 mu mol m(-2) s(-1)). We first demonstrate that under nonstress conditions cry1 alpha regulates seedling growth by mechanisms that involve pigmentation, lipid peroxidation and osmoprotectant accumulation in a blue light-dependent manner. In addition, we further highlighted under osmotic stress conditions that cry1 alpha increased tomato growth by reduced malondialdehyde (MDA) and proline accumulation. Although blue light is an environmental signal that influences osmotic stress responses mediated by tomato cry1a, specific blue light fluence rates are required during these responses. Here, we show that CRY1 alpha manipulation may be a potential biotechnological target to develop a drought-tolerant tomato variety. Nevertheless, the complete understanding of this phenomenon requires further investigation. (AU)

• Processo FAPESP: 17/26130-9 - São os criptocromos parte da sinalização de resposta ao estresse induzido por déficit hídrico em tomateiro?
• Beneficiário: Victor D'Amico Damião
• Modalidade de apoio: Bolsas no Brasil - Doutorado