Data/hora: 26/05/2024 00:59:18

Biblioteca(s): 	Embrapa Pantanal.	
Data corrente: 	01/03/1999	
Data da última atualização: 	01/03/1999	
Autoria: 	TAKKAR, P. N.; KAUR, N. P.	
Afiliação: 	Department of Soils, Punjab Agricultural University, Ludhiana, India.	
Título: 	HC1 method for Fe2+ estimation to resolve iron chlorosis in plants.	
Ano de publicação: 	1984	
Fonte/Imprenta: 	Journal of Plant Nutrition, v.7, n.1/5, p.81-90, 1984.	
Idioma: 	Inglês	
Conteúdo: 	The equation dictates that acid solutions should not cause reduction of Fe3+ during extraction of Fe2+ from plants and provide the possibility to preferentially extract Fe2+. Both in vitro and in vivo extraction of Fe2+ with 1N HCl did not cause reduction of Fe3+. Two g chopped fresh plant was reacted with 0.5 to 1.5N HCl and 1:5 to 1:10 tissue: extractant ratios for 24 h. The Fe2+ and Fe3+ in buffered filterates (pH 3.0) were determined with 1-10 o-phenanthroline (o-Ph). 1N HCl and 1:10 ratio resolved better the Fe2+ differences between green and iron-chlorotic plants. Fe2+ iron in chlorotic as compared to non-chlorotic leaves of different crops was 30 to 82%. This method resolved better or equally good, the visible iron chlorosis in plants, compared to o-Ph method and is much cheaper. The method also eliminates the inherent error arising from extraction of pigments. 	
Palavras-Chave: 	Acid fraction; Active iron; Ferro ativo; Ferroin; Fracao acida; In vivo; Invitro; Iron chlorosis; Reduction.	
Thesagro: 	Redução.	
Thesaurus Nal: 	chlorophyll.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Pantanal (CPAP)	
Exemplares: 	CPAP - (36836-1) - ADD - SP - -- - SP3691 -  - 3691 - DIS