Silicate improves growth and ion absorption and distribution in aloe vera under salt stress.
Zhi Wu Sheng Li Yu Fen Zi Sheng Wu Xue Xue Bao
; 32(1): 73-8, 2006 Feb.
Article
en En
| MEDLINE
| ID: mdl-16477134
ABSTRACT
Si 2.0 mmol/L in irrigation solution alleviated significantly the inhibition of NaCl stress of 100 or 200 mmol/L to aloe growth. Exogenously applied Si decreased significantly Na(+) and Cl(-) contents, increased K(+) content and K(+)/Na(+) ratio and selectivity ratio of absorption (AS(K, Na)) and of translocation (TS(K, Na)) to K(+) and Na(+) in aloe plant under both NaCl 100 and 200 mmol/L stresses for 30 d. In this way, the ion homeostasis in aloe plant under NaCl stress was maintained, as was proved by X-ray microanalysis of root tip and leaf across sections. One of the mechanisms to achieve this may be the significant enhancement of H(+)-ATPase activities by the addition of silicate in plasma membrane and tonoplast, H(+)-pyrophosphatase (H(+)-PPase) activity in tonoplast isolated from aloe root tips under NaCl stress.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Sales (Química)
/
Estrés Fisiológico
/
Cloruro de Sodio
/
Silicatos
/
Aloe
/
Iones
Idioma:
En
Revista:
Zhi Wu Sheng Li Yu Fen Zi Sheng Wu Xue Xue Bao
Asunto de la revista:
BIOLOGIA MOLECULAR
/
BOTANICA
Año:
2006
Tipo del documento:
Article
País de afiliación:
China