The region which is adjacent to the seed surface is termed as spermosphere (Figure 10.8). Healthy seeds carry specific bacterial flora in respect to number and species. There are several reports in the literature on the quantity and quality of microorganisms carried by the seeds of different plants species both externally and internally. When the seed is sown in soil, certain interactions between the seed borne microflora and the soil microorganisms take place under the influence of chemicals excluded by the germinating seed.
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