Data/hora: 03/07/2024 11:54:30

Biblioteca(s): 	Epagri-Sede.	
Data corrente: 	19/06/2018	
Data da última atualização: 	19/06/2018	
Autoria: 	AMARANTE, C. V. T.; MIQUELOTO, A.; STEFFENS, C. A.; MACIEL, T. M.; DENARDI, V.; ARGENTA, L. C.; FREITAS, S. T.	
Título: 	Optimization of fruit tissue sampling method to quantify calcium, magnesium and potassium contents to predict bitter pit in apples.	
Ano de publicação: 	2018	
Fonte/Imprenta: 	ACTA HORTICULTURAE, Cartagena, Murcia, Spain, v. , n. 1194, p. 487-492, 2018.	
Idioma: 	Inglês	
Conteúdo: 	This study was carried out to identify the best tissue sampling method and
mineral attribute to predict bitter pit (BP) occurrence in apple fruit. ?Catarina? apples
were stored at 0±0.5°C and 95% RH for four months and then separated in lots
without and with BP symptoms, which were submitted to Ca, Mg and K analysis (mg
kg-1 of fresh weight) in the total fraction (TF) of peel+flesh, and in the TF and soluble
fraction (SF) of flesh or peel tissues. For the peel+flesh, a wedge-shaped segment was
cut longitudinally from the fruit (with 1 cm wide at the equatorial region), discarding
the core tissue. For peel (thickness of 2 mm) or flesh (thickness of 6 mm, under the
peel) sampling, the fruits were cut along the equatorial region and only the distal end
was used. Fruit without BP showed higher Ca content in the TF of peel+flesh and flesh,
as well as lower Mg content in the TF and SF of flesh and lower K content in the TF of
peel than fruit with BP. Fruit without BP had lower Mg/Ca, K/Ca and (Mg+K)/Ca ratios
in the TF of peel+flesh, in the TF and SF of flesh, and in the SF of peel than fruit with
BP. Also, fruit without BP had lower K/Ca and (Mg+K)/Ca ratios in the TF of peel than
fruit with BP. The results show that BP occurrence in ?Catarina? apples is associated
with high Mg/Ca and K/Ca ratios in the fruit. In addition, these ratios assessed in
soluble extracts obtained from the peel or flesh, at the distal end of apples, represent
a valuable approach to predict the risk of BP. Mineral analysis in soluble extract
eliminates the step of acid digestion of fruit tissues, substantially reducing costs and
time.	
Palavras-Chave: 	flesh; Malus domestica; peel; physiological disorder; soluble mineral content; total mineral content.	
Categoria do assunto: 	F Plantas e Produtos de Origem Vegetal	
URL: 	http://intranetdoc.epagri.sc.gov.br/producao_tecnico_cientifica/DOC_40722.pdf	
Registro original: 	Epagri-Sede (Epagri-Sede)	
Exemplares: 	Epagri-Sede - (102320-1) - UPC - AP - DD -  -  -  - DIS