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Rhizome Differentiation in Yellow Nutsedge

Published online by Cambridge University Press:  12 June 2017

D. K. Garg ,
L. E. Bendixen  and
S. R. Anderson
D. K. Garg
Affiliation:
College of Agriculture, Jobner, Rajasthan, India. (Formerly graduate student at the Ohio State University, Columbus.)
L. E. Bendixen
Affiliation:
Ohio State University and the Ohio Agricultural Research and Development Center
S. R. Anderson
Affiliation:
Ohio State University and the Ohio Agricultural Research and Development Center
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Abstract

Rhizome differentiation in yellow nutsedge (Cyperus esculentus L.), cultured under 12½, 14, and 15½-hr photoperiods, 21–16, 27–21, and 33–27 C temperatures (day and night, respectively), Hoagland solutions of 1/32, 1/8, and 1/2 strength nitrogen (N), and 0, 10, and 1000 ppm gibberellin (GA), was investigated in controlled-environment chambers.

High levels of N, long photoperiods, and high levels of GA at the shortest photoperiods inhibited tuberization whereas high temperatures at the lowest N level favored tuberization. Shoot formation was promoted by high levels of N, long photoperiods, and high temperatures under 12½ and 14-hr photoperiods while GA had a retarding effect. The higher levels of N, temperature, and GA decreased carbohydrate level whereas the longer photoperiods increased it.

It may be concluded that tuberization is not only the result of surplus carbohydrates in the plant but is controlled also by some GA-like substances regulated in the plant under specific conditions of photoperiod and temperature.

Type
Research Article
Information
Weeds , Volume 15 , Issue 2 , April 1967 , pp. 124 - 128
Copyright
Copyright © 1967 Weed Science Society of America 

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References

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