Role of boron in plasma membrane H+-ATPase hydrolytic and pumping activity in maize (Zea mays L.)
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Abstract
The results are summarized as:1. Boron application in the nutrient medium had a positive influence on plant growth. It improved the plant biomass as well as expansion growth. The results showed that the effect of B is more pronounced in young growing leaves. Furthermore, B concentration in shoot of maize plants was increased by the addition in nutrient medium.2. Boron addition in the nutrition solution significantly increased the initial rate of proton pumping of the plasma membrane H+-ATPase isolated from maize shoots. Boron nutrition also showed increasing trend in hydrolytic activity of plasma membrane H+-ATPase. Moreover, B addition in nutrition medium enhanced the transcription as well as translation of plasma membrane H+-ATPase. Boron-treated plants showed 40% increased enzyme concentration in shoots and higher transcription on MHA3 and MHAfam as compared to the B-deficient plants.3. In vitro addition of B did not change the hydrolytic and pumping activities of plasma membrane H+-ATPase, which indicates that B had no direct interaction of B with the plasma membrane ATPase molecule.Link to publications or other datasets
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Giessen : VVB Laufersweiler