Suitability of different gels as seed carriers and germination and emergence promoters in processing carrots.

摘要

Stand establishment is critical for optimizing yield and quality in carrots. Low soil temperatures and moisture conditions often challenge seed germination and emergence. Providing an artificial exosperm with appropriate germination promoters, stress conditioners and growth invigorators to the seed may facilitate uniform germination and emergence. Germination patterns and velocity of germination of 'Oranza' carrot was studied. Seeds were mixed in different types of gels at various ratios and incubated at either 5 or 20 degrees C. Gels used were Laponite RD, Laponite RDS, guar gum, algenic acid, and agar. Data on germination percentage was collected and the velocity of germination was calculated. Germination was delayed at 5 degrees C. Both at 5 and 20 degrees C, Laponite RD promoted and enhanced germination and vigour, and resulted in the highest mean germination percentage (90% at 20 degrees C and 89% at 5 degrees C). Laponite RD at 2.5% has shown an overall advantage in germination percentage (94% at 20 degrees C and 87% at 5 degrees C) over other gel types and concentrations..