Publication Date
1989
Description
It is generally reported that carbohydrate and organic nitrogen reserves contribute to re-growth of new foliage in perennial grassland species subjected to clipping management. Only few studies are concerned with the comparative pattern of the mobilization, translocation and recovery of carbohydrate and nitrogen reserves during re-growth following defoliation. Davidson and Milthorpe (1966) have suggested that proteins are mobilized to produce energy in the absence of photosynthate whereas non-structural carbohydrates are generally considered as the major organic reserves mobilized during regrowth (White, 1973). The objective of this study was to determine the origin of the mobilized nitrogen compounds and to follow the changes in carbohydrate contents during re-growth of defoliated ryegrass. A kinetic study was conducted on plants grown under hydroponic conditions and 15N fertilized for 14 days after being defoliated. During the same period, changes in carbohydrate contents were followed in stubble which are the primary site of storage of non-strutural carbohydrates in grasses such as ryegrass.
Citation
Ourry, A; Gonzalez, B; Bigot, J; Boucaud, J; and Salette, J, "Nitrogen and Carbohydrate Mobilizations during Regrowth of Defoliated Lolium perenne L." (2025). IGC Proceedings (1989-2023). 91.
https://uknowledge.uky.edu/igc/1989/session1/91
Included in
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Nitrogen and Carbohydrate Mobilizations during Regrowth of Defoliated Lolium perenne L.
It is generally reported that carbohydrate and organic nitrogen reserves contribute to re-growth of new foliage in perennial grassland species subjected to clipping management. Only few studies are concerned with the comparative pattern of the mobilization, translocation and recovery of carbohydrate and nitrogen reserves during re-growth following defoliation. Davidson and Milthorpe (1966) have suggested that proteins are mobilized to produce energy in the absence of photosynthate whereas non-structural carbohydrates are generally considered as the major organic reserves mobilized during regrowth (White, 1973). The objective of this study was to determine the origin of the mobilized nitrogen compounds and to follow the changes in carbohydrate contents during re-growth of defoliated ryegrass. A kinetic study was conducted on plants grown under hydroponic conditions and 15N fertilized for 14 days after being defoliated. During the same period, changes in carbohydrate contents were followed in stubble which are the primary site of storage of non-strutural carbohydrates in grasses such as ryegrass.
