Abstract
Extracts of the brown seaweeds (Sargassum myricocystum) red seaweed (Gracilaria edulis) and green seaweed (Caulerpa racemosa) have been used as a biostimulant to promote seedling emergence and vigour. The two different concentrations (1 and 5%) and soaking durations of (1:1 seed t solution ratio) were used. Results of the present study suggest that the sunflower seed soaked in 5% C. racemosa seaweed extract for 8 h performed significantly in all estimated characters (72% Germination; 15.95 cm Shoot length; 13.60 cm Root length; 0.399 OD Dehydrogenase activity; 0.277 dSm-1 electrical conductivity and lowest abnormal seedlings production 3%) can be recommended as a mid storage seed treatment for improving the vigour and viability of aged seeds. Key words: Seaweed extracts, sunflower seeds and vigour.
Highlights
Seaweeds are one of the most important marine resources of the world
Results of the present study suggest that the sunflower seed soaked in 5% C. racemosa seaweed extract for 8 h performed significantly in all estimated characters (72% Germination; 15.95 cm Shoot length; 13.60 cm Root length; 0.399 OD Dehydrogenase activity; 0.277 dSm-1 electrical conductivity and lowest abnormal seedlings production 3%) can be recommended as a mid storage seed treatment for improving the vigour and viability of aged seeds
Sunflower seeds treated with C. racemosa 5% aqueous solution of seaweed extract showed significantly higher percent emergence, shoot length and root length over control and water
Summary
Seaweed extract is a new generation of natural organic fertilizers containing highly effective nutritious and promotes faster germination of seeds. Quality seed is the key for successful and sustainable agriculture. Tropical countries like India, due to prevalence of high temperature and relative humidity may greatly accelerate seed ageing. Loss of physiological quality during ageing leads to deterioration of seeds. Any treatment given to seeds at the time of packing for maintaining physiological stamina and germination will be advantageous. Use of organics (or) naturally occurring biological materials like seaweeds is a new approach for seed preservation. With this background the present study was undertaken to explore the possibility of utilizing
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