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Carbohydrate Metabolism in Orchardgrass (Dactylis glomerata L.) 1
Author(s) -
Burris J. S.,
Carson E. W.
Publication year - 1971
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1971.0011183x001100020002x
Subject(s) - biology , pentose phosphate pathway , dactylis glomerata , carbohydrate , pentose , respiration , carbohydrate metabolism , nutrient , botany , zoology , nitrate , metabolism , biochemistry , horticulture , glycolysis , poaceae , ecology , fermentation
Summary Orchardgrass was grown on complete nutrient solution with the nitrogen as nitrate. Plants were grown in controlled environment chambers for 4, 7, and 11 weeks. Release of labeled CO 2 from specifically labeled glucose was used to measure the pentose monophosphate shunt and Embden Meyerhoff Parnas (EMP) pathway activities in shoot basal material. Total respiratory activity decreased with age. The activity attributed to the pentose shunt followed a similar trend showing a complete absence at 11 weeks of growth. However, the EMP activity shifted less predictably, although decreasing with age; a larger proportion of the total respiration was gradually being assumed by the EMP system. Thus, this system is used less for generating reductive energy in the cell while its substrate is also used for carbohydrate storage in the tissue.