No abstract

Application of dyes to roots or shoots is an easy way to visualize xylem pathways in plants. It was shown that upward transport was sectorial straight. A main root appeared to contribute to the transport to several basal shoots. Application of dyes to shoots showed that each basal shoot is supplied by only a part of the root xylem. It is supposed that at the moment of appearance of a new basal shoot, the root xylem becomes enveloped by a new xylem cylinder, resulting in a limited area of root xylem serving the former developed shoot. The large variation in shoot diameter in a rose crop is discussed in relation to xylem systems.

No abstract

No abstract