Nitrogen Transportation in Oilseed Rape (Brassica napus L.) Plant during Flowering and Early Siliqua Developing |
| |
| Authors: | Q Z Zhang A Kullmann G Geisler |
| |
| Institution: | Institute of Crop Science and Plant Breeding, University of Kiel (FRG) |
| |
| Abstract: | Nitrogen transportation from different organs was investigated by labelling pods, leaves and internodes of upper stem with 15N-urea during flowering. Labelled plants were harvested one month after flowering and determined the amount of 15N in relative parts. The results of the experiment show the directions of 15N applied in different organs during flowering. Transportation of 15N applied in pods of lower terminal of the main stem and first branch was mainly directed to seeds inside the labelled pods, about 17 % of 15N entered into seeds 7 days after last labelling, a little transportation each other between the branch and terminal was found, more than 80 % of 15N applied on leaves during flowering was transported out of the leaves after flowering, 35 % and 67.93 % on average was translocated in pods for early and late flowering, respectively, while 55.97 % of 15N applied on surface of internodes of upper stem below terminal was found in pods. It was corroborated that nitrogen transportation also occurs within pods by labelling different parts of pods, much greater amount of nitrogen was transported from lower part to upper part of pods than those in opposite direction. |
| |
| Keywords: | nitrogen transportation Brassica napus L pod development |
|
|
