Stenting: ROOTING AND GRAFTING AT THE SAME TIME


===================================================


STENTING: GRAFTING AND ROOTING AT THE SAME TIME

It is often necessary to propagate new rose bushes by grafting selected rose
cultivars onto rose rootstocks. Seedling rootstocks of Rosa canina, a
preferred variety, show genetic variation. To develop a uniform crop these
variations are not desired. For the most uniform quality rose rootstocks
should be vegetatively propagated by the rooting of cuttings.

Stenting is a method for the quick propagation of roses. Cutting and
grafting is performed in one action. In Dutch the word "stenting" means "to
stem". It is a combination "stekken" meaning "to strike a cutting" and
"enter" meaning "to graft". The success of simultaneous cutting and grafting
is cost effective.

In practice, the scion consists of the cultivar stem taken with one leaf and
a dormant bud. The scion is grafted on a single internode of the non-rooted
rootstock. Formation of the graft union and of adventitious roots on the
rootstock occur simultaneously. The combined process takes three weeks.

The technique of stenting by means of grafting a scion on a rootstock
consisting of one bare internode has many advantages. It is very important
that the cultivars are grown on the most suitable rootstock. For cut rose
bushes the rootstock must induce vigorous growth. Some rootstocks like the
'Multiflora' types are so vigorous that it is impossible to get a good graft
union with some cultivars after budding or bench-grafting on an existing
root-system; the grafted bud or scion is over powered by the activity of the
rootstock. Using the stenting process there are no problems because the
formation of the graft union and of adventitious roots occur simultaneously.

Stenting is more complicated than the conventional rooting of cuttings. The
graft union must be formed before root initiation. After leaves form on the
scion there must be a free transport flow of carbohydrates and natural
hormones from the leaf to the base of the rootstock. These plant products
are used in the rootstock for new root initiation. When a suitable rootstock
is used the root formation after stenting can be better than those produced
by conventional rooting.

Stenting is a good method to evaluate new scion-stock combinations and to
investigate the interaction between shoots and roots. It can be performed
all year. For production purposes stenting provides the possibility of
year-around propagation. By stenting, growers can use expensive grafting
equipment more than four months per year besides their traditional
techniques.

For more details visit:
http://www.rooting-hormones.com/stenting.htm

regards
Joel Kroin
jkroin@hortus.com



  *************** Hortus USA Corp ***************
PO Box 1956 Old Chelsea Sta, New York NY 10113 USA
     US Importer of Rhizopon Rooting Hormones
Visit our web site- http://www.rooting-hormones.com
  ************    info@hortus.com    ************









---------------------------------------------------------------------
To sign-off this list, send email to majordomo@mallorn.com with the
message text UNSUBSCRIBE PERENNIALS
Other Mailing lists | Author Index | Date Index | Subject Index | Thread Index