Study of the effects of foliar application of ABA during acclimatization

• Tipo: Artigo em Revista Científica Internacional
• Data: 2014

Autores

Dias, MC (Autor) Outra; Correia, C (Autor) Outra; Moutinho Pereira, J (Autor) Outra; Oliveira, H (Autor) Outra; Santos, C (Autor) Outra

Revista

Título: Plant Cell, Tissue and Organ Culture

Vol. 117

Páginas: 213-224

ISSN: 0167-6857

Editora: Springer Nature

Indexação

ISI Web of Knowledge - 23 Citações

Scopus - 24 Citações

Outras Informações

ID Authenticus: P-009-3S8

DOI: 10.1007/s11240-014-0434-3

Abstract (EN): This study aims to elucidate the effects of abscisic acid (ABA) foliar application on plant hardening during ex vitro acclimatization using a forest model species Ulmus minor L. Plant leaves were sprayed with ABA (0, 50 and 100 mu M) immediately after ex vitro transfer and twice a week for the first 3 weeks of acclimatization. After this period, parameters related with photosynthesis, hormone levels and oxidative stress were measured to assess plant performance. The results demonstrated that ABA foliar application alleviates the negative shock of ex vitro acclimatization since it reduces the water loss through transpiration, relieving the risk of wilting. Moreover, ABA promoted net CO2 assimilation rate (P (N) ) and plant dry mater accumulation. ABA treatment increased the antioxidant battery during acclimatization, with more effective results at the concentration of 50 mu M ABA. Also, flow cytometry data support that cytosolic compounds, which may increase in response to 50 mu M ABA, could also protect DNA from oxidative damage. We propose here that ABA foliar application (immediately after ex vitro transfer), by preventing water loss, enhancing photosynthesis efficiency and the activity of antioxidant enzymes, improves the plants hardening and ability to deal with the ex vitro stresses.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 12