Vitamin K-like compds. are widely diffused in plants, but their role and function are still partially unknown. Vitamin K1 - phylloquinone - is largely present in thylakoid membranes as electron carrier inside the PSI redox chain. More recently, it has been found that Vitamins K1 and K3 may also affect the plasmalemma-bound H+-ATPase and reductase activities. In this article we report the effects of Vitamin K3 treatment on the above activities in three different conditions: in the presence of Vitamin K3; after the addn. of Vitamin K3 to the hydroponic soln.; after sonication of plasma membrane in the presence of Vitamin K3 in the soln. Results showed that Vitamin K3 was able to improve both plasmalemma H+-ATPase and reductase activities at a concn. that is very well tolerated by the whole plant. Our findings support the hypothesis that Vitamin K is involved in plasmalemma activities of both mono and dicotyledonous plants.
Effect of Vitamin K3 on plasma membrane-bound H+-ATPase and reductase activities in plants / P. De Nisi, P. Manzotti, G. Zocchi. - In: PLANT SCIENCE. - ISSN 0168-9452. - 170:5(2006), pp. 936-941.
|Titolo:||Effect of Vitamin K3 on plasma membrane-bound H+-ATPase and reductase activities in plants|
DE NISI, PATRIZIA (Primo)
ZOCCHI, GRAZIANO (Ultimo)
|Parole Chiave:||H+-ATPase; Menadione sodium bisulfite; Phylloquinone; Reductase activity; Vitamin K|
|Settore Scientifico Disciplinare:||Settore AGR/13 - Chimica Agraria|
|Data di pubblicazione:||2006|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1016/j.plantsci.2005.12.019|
|Appare nelle tipologie:||01 - Articolo su periodico|