ISHS Acta Horticulturae 424: II International Rose Symposium
NITRATE REDUCTASE AND GLUTAMINE SYNTHETASE ACTIVITY IN ROSE PLANTS (ROSA X HYBRIDA CVS. ILSETA AND MERCEDES): EFFECTS OF ROOT-SHOOT INTERACTIONS |
| Authors: | H. Agbaria, B. Heuer, N. Zieslin |
| Abstract:
The productivity of grafted roses is usually higher than that of ungrafted ones. It has been suggested that the advantage of using a rootstock lies in its effects on nitrogen metabolism in the grafted plants. We have found that the rose grafting by itself, without changing the roots, affected significantly nitrate reductase activity (NRA) in the leaves and roots of graftlings, there was only a slight effect on glutamine synthetase activity (GSA). However the GSA in leaves of cv. Ilseta and cv. Mercedes was higher when they were grafted on R. indica rootstock. In older plants, there was a great effect of grafting and rootstock on enzymatic NRA and GSA. A remarkable differences were also observed in the profile of proteins of leaves of cv. Mercedes grafted on different rootstocks. | |
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