Effect of CaCl treatment on the changing of drought related physiological and biochemical indexes of

Abstract

Some experiments revealed that the Ca²⁺ has a relationship with drought resistance. In this paper, some physiological and biochemical indices were studied in order to analyze the effect of Ca²⁺ treatment on the drought resistance of Brassica napus. The physiological and biochemical experiments revealed that the proline content and the soluble sugar contents in the Ca²⁺-treated B. napus were much higher than those of water-treated B. napus. However, the content of malonaldehyde in the Ca²⁺ treated B. napus was lower than that of control. The transpiration and stomatal conductance analysis show that the transpiration and stomatal conductance in the Ca²⁺-treated materials were lower than those of water-treated materials. Further research revealed that the stomata hatch of Ca²⁺-treated materials was markedly less than that of water-treated materials, which indicated that the closure of the stomata was the main reason for the decrease of transpiration and stomatal conductance.

Keywords

Brassica napus, physiological and biochemical index, stomatic observation