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Growth and Carbohydrate Status of Sago Pondweed

Published online by Cambridge University Press:  12 June 2017

Richard H. Hodgson
Richard H. Hodgson*
Affiliation:
Crops Research Division, Agricultural Research Service, U. S. Department of Agriculture
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Abstract

Tubers of sago pondweed (Potamogeton pectinatus L.) were grown at 72 F in a 14-hr photoperiod under 400 ft-c of coolwhite fluorescent illumination. Plants were randomly harvested each day for 30 days, the organs individually weighed, and carbohydrate determinations made on selected tissues. Unsprouted tubers averaged 19.5% dry weight of which 74% was carbohydrate, predominantly in non-extractable form. During growth, the carbohydrate supply in the tubers decreased logarithmically by ½ each 4.93 days. Shoots began to grow logarithmically at 11 days, doubling in dry weight each 4.5 days. After 18 days, the carbohydrate content of the main shoot increased logarithmically, doubling each 7.35 days. Plants produced from average tubers increased 7-fold in dry weight in 30 days. Growth analysis showed that no shoots became self-sufficient before 16 days. Deduced patterns of carbohydrate flow are correlated with reports of herbicidal effectiveness.

Type
Research Article
Information
Weeds , Volume 14 , Issue 3 , July 1966 , pp. 263 - 268
Copyright
Copyright © 1966 Weed Science Society of America 

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References

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