Data/hora: 02/06/2024 02:29:00

Provedor de dados: | 91
País: | Brazil
Título: | Effects of NaCl-salinity on growth and inorganic solute accumulation in young cashew plants
Autores: | Viégas,Ricardo A.; Silveira,Joaquim A. G. da; Lima Junior,Adeildo R. de; Queiroz,José E.; Fausto,Maria J. M.
Data: | 2001-05-01
Ano: | 2001
Palavras-chave: | Anacardium occidentale; Salinity stress; Ionic toxicity; Potassium; Sodium; Chloride.
Resumo: | The NaCl effects on the growth and inorganic solute accumulation were studied on 30-day-old cashew plants (Anacardium occidentale L.) hydroponically grown for 8 days (short term) and 40 days (long-term) with NaCl at different levels. The shoot fresh mass yielded after 40 days, in response to 50 and 100 mol m-3 NaCl, decreased by 25 and 75%, respectively. This decrease was markedly low in root fresh mass, which did not change under 50 mol m-3 NaCl and decreased nearly to 30% under 100 mol m-3 NaCl, as compared to control plants. In short-term experiment, salinity induced only slight changes of K+ tissue concentrations in the whole plant. In the long-term experiment, K+ tissue concentrations were substantially decreased, particularly in roots. In response to time and increasing levels of salinity, Na+ and Cl- ions concentrations reached toxic levels in leaves. Thus, cashew plants already from the 4th day of salinity stress exhibited earlier symptoms of ionic toxicity, and therefore they were not able to regulate metabolic and physiological functions under these harmful conditions.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662001000200007
Editor: | Departamento de Engenharia Agrícola  - UFCG
Relação: | 10.1590/S1415-43662001000200007
Formato: | text/html
Fonte: | Revista Brasileira de Engenharia Agrícola e Ambiental  v.5 n.2 2001
Fonte: | info:eu-repo/semantics/openAccess