Effect of Nostoc commune Polysaccharides on Wheat Seed Germination and Physiological Characteristics of Seedlings
To investigate the effects of algal polysaccharides on seed germination and seedling growth,this study used wheat variety Ji Mai 22 as the material and applied varying concentrations(0,0.25,0.50,1.00,2.00,4.00,8.00 mg·L-1)of Nostoc commune polysac-charide.The study assessed the germination,morphological,and physiological indexes of the seedlings.The results revealed that as the concentration of algal polysaccharides increased,the wheat seed germination index and seedling growth index followed a pattern of initial low promotion,which was subsequently followed by strong inhibition.Compared to the control group(CK),treatments T1,T2,T3,and T4 enhanced the wheat seed germination index,promoted root and leaf growth,and increased chlorophyll,soluble sugar,and soluble protein levels in the seedlings.In contrast,treatments T5 and T6 resulted in a decrease in these parameters.The highest val-ues were observed under the T3 treatment.Specifically,compared to CK,the germination rate,germination potential,and germination index increased by 16.3％,10.0％,and 10.3％,respectively.Additionally,root and leaf lengths increased by 2.48 cm and 1.90 cm,respectively,while chlorophyll,soluble sugar,and soluble protein content rose by 68.04％,35.20％,and 42.02％,respectively.Princi-pal component analysis indicated that the first and second principal components accounted for 81.8％and 9.1％of the total variance,respectively,with the combined contribution of the two components reaching 90.9％.Significant correlations were found between the indexes,and seed germination was particularly influenced by root length.In conclusion,the application of an optimal concentration of algal polysaccharide can significantly enhance the germination rate and promote seedling growth in wheat.Under the experimental conditions,the highest germination rate and best seedling growth were achieved with a concentration of 1 mg·L-1 algal polysaccharide.These findings contribute to identifying the optimal application concentration of algal polysaccharides,provide a theoretical foundation for further research into their agricultural applications,and support the scientific use and potential widespread adoption of algal polysaccharides in plant cultivation.
Nostoc commune polysaccharideseed germinationgrowth and physiological indicatorprincipal component analysis
万方数据
维普
