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Physiological Effects of Ultra-High Temperatures on Corn

Published online by Cambridge University Press:  12 June 2017

T. C. Ellwanger Jr. ,
S. W. Bingham  and
W. E. Chappell
T. C. Ellwanger Jr.
Affiliation:
Dep. of Plant Path, and Virginia Polytech. Inst, and State Univ., Blacksburg, Va. 24061
S. W. Bingham
Affiliation:
Dep. of Plant Path, and Virginia Polytech. Inst, and State Univ., Blacksburg, Va. 24061
W. E. Chappell
Affiliation:
Dep. of Plant Path, and Virginia Polytech. Inst, and State Univ., Blacksburg, Va. 24061
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Abstract

Twelve-day-old corn seedlings (Zea mays L. ‘Funk's G-83’) were exposed to thermal conditions (482 C for 125 msec) approximating those used for flame weed control. Tissue dehydration was evident within 1 min after flame application. One hour after flame exposure, the water content of shoot tissues was 6% less than in nonflamed shoots. Transpirational water loss 16 hr after flame application was reduced by 68% when compared to that of nonflamed seedlings. Assimilation of 14CO2 by flamed seedlings, while substantially decreased when compared with that of nonflamed seedlings, continued on a limited basis even in the most severely injured leaf tips.

Type
Research Article
Information
Weed Science , Volume 21 , Issue 4 , July 1973 , pp. 296 - 299
Copyright
Copyright © 1973 Weed Science Society of America 

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References

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