Data/hora: 24/06/2024 23:20:32

Biblioteca(s): | Embrapa Mandioca e Fruticultura.
Data corrente: | 11/05/2020
Data da última atualização: | 15/07/2020
Autoria: | LIMA, L. K. da S.; JESUS, O. N. de; SOARES, T. L.; SANTOS, I. S. dos; OLIVEIRA, E. J. de; COELHO FILHO, M. A.
Afiliação: | LUCAS KENNEDY DA SILVA LIMA; ONILDO NUNES DE JESUS, CNPMF; TALIANE LEILA SOARES; IDALIA SOUZA DOS SANTOS; EDER JORGE DE OLIVEIRA, CNPMF; MAURICIO ANTONIO COELHO FILHO, CNPMF.
Título: | Growth, physiological, anatomical and nutritional responses of two phenotypically distinct passion fruit species (Passiflora L.) and their hybrid under saline conditions.
Ano de publicação: | 2020
Fonte/Imprenta: | Scientia Horticulturae, v. 263, 2020.
ISSN: | 0304-4238
Idioma: | Inglês
Conteúdo: | Passion fruit is one of the main crops produced in the irrigated areas of Northeastern Brazil. However, soil salinization in this region has limited its productivity. This work aimed to compare the effects of saline stress on three populations of passion fruit (Passiflora edulis Sims, P. mucronata Lam. and the interspecific hybrid P. edulis x P. mucronata) using physiological, anatomical, nutritional, agronomic traits and application of near-infrared spectroscopy (NIRS). Plants were grown on sterile washed sand and irrigated with a nutrient solution with or without NaCl (0 or 150 mM) in a completely randomized design with eight replicates. Most of the physiological traits, such as transpiration, stomatal conductance, net photosynthetic rate, chlorophyll content and leaf osmotic potential, were negatively affected by the saline stress. There was also a negative effect for the majority of anatomical traits evaluated in the presence of NaCl, except the stomatal density and upper epidermal thickness. The NaCl also induced changes in uptake of macro- and micronutrients and decreased plant growth, fresh shoot and root weights, and dry shoot weight. Based on the principal component analysis (PCA), 18 informative traits were identified for the discrimination of the passion fruit population for saline stress. P. mucronata exhibited better salt tolerance in comparison with the other populations, especially with higher values for root traits, a lower accumulation of sodium in the leaves, and maintenance of photosynthesis, conductance and stomatal functionality. Near-infrared spectrophotometry (NIRS) allowed the separation of the parental Passiflora populations submitted to the saline treatment, opening the possibility of validating its use for screening passion fruit genotypes for tolerance of salinity. Breeding for salt tolerance in passion fruit is feasible using wild species such as P. mucronata.
Thesagro: | Maracujá.
Thesaurus Nal: | Passion fruits.
Categoria do assunto: | --
Registro original: | Embrapa Mandioca e Fruticultura (CNPMF)
Exemplares: | CNPMF - (33050-1) - UPC - AP - DD - Publicaçãi digital -  -  - DIS