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Emergence of seedlings from different depths following high temperature stress

Published online by Cambridge University Press:  27 March 2009

I. C. Onwueme  and
S. A. Adegoroye
I. C. Onwueme
Affiliation:
Plant Science Department, University of Ife, Ile-Ife, Nigeria
S. A. Adegoroye
Affiliation:
Plant Science Department, University of Ife, Ile-Ife, Nigeria
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Summary

Seeds of Amaranthus, melon, cowpea and tomato were planted in moist soil at 1, 4 or 7·5 cm depth and subjected to a heat stress of 45 °C for 10 h on the day of sowing (day 0), 1 day after sowing or 2 days after sowing. Seedling emergence was retarded by heat stress, the most drastic retardation being due to heat stress on day 1 for cowpea and tomato, day 2 for melon, and day 0 for Amaranthus. Emergence also decreased with increasing depth of sowing. The interaction of depth and heat stress was also significant in all cases, such that the delay in emergence due to heat stress tended to be greater with increasing depth of sowing. The agronomic significance of the results is discussed.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 84 , Issue 3 , June 1975 , pp. 525 - 528
Copyright
Copyright © Cambridge University Press 1975

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References

REFERENCES

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