Abstract:
A hydroponics experiment was conducted to study the effect of exogenous Ca
2+ and GA
3 on cucumber germination inhibited by
Peganum harmala alkaloid. The results indicate that Ca
2+ and GA
3, single or combined application treatments, promote cucumber seed germination treated with
P.harmala alkaloid, increase germination rate, germination vigor and index; as well as α-amylase, protease, lipase, isocitratelyase, nicotinamide adenine dinucleotide kinase (NADK) and Ca
2+—ATPase activities; and GA and CaM content in cucumber seeds; but decrease abscisic acid (ABA) content. The synergistic effects of combined Ca
2+ and GA
3 on increasing GA and decreasing ABA are oberseved compared with Ca
2+ treatment. It shows that exogenous Ca
2+ and GA
3 can alleviate
P. harmala alkaloid inhibition in cucumber germination.