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Variation in rooting behavior of stem cuttings in relation to their origin in Taxus wallichiana Zucc.

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Title Variation in rooting behavior of stem cuttings in relation
to their origin in Taxus wallichiana Zucc.
 
Creator Kaul, Kiran
 
Description The present study investigates optimal conditions for the vegetative propagation
of Himalayan yew Taxus wallichiana Zucc., an important medicinal tree, during
spring. Effect of four treatments: (a) sex of donor plant (male and female), (b) age/type of
shoot (1, 2, 3 year old, long and dwarf shoots), (c) auxin treatment (IBA and NAA at 0, 0.5,
1.25, 5.0 & 50.0 mM) and (d) rooting environment (raised beds/polythene bags) on percentage
rooting in stem cuttings was studied. Randomized complete block (RBD) designs
were used for experimentation. Rooting ability of cuttings was significantly influenced by
all these treatments. The overall rooting response was higher in long shoot cuttings taken
from female tree. Age of shoot also influenced the rooting response and was highest in 1
year old long shoot cuttings of female tree. Exogenous application of auxin, a-naphthalene
acetic acid (NAA) and indole-3 butyric acid (IBA), had significant positive effect on the
percentage rooting. IBA significantly enhanced the rooting percentage in 1 year old long
and dwarf shoots at lower doses and 2 and 3 year old long shoots from female tree at higher
doses. Maximum percent rooting (90% ± 2.8) was obtained with interactive effect of
0.5 mM, NAA (22 h) 9 1 year old long shoot from female tree; followed by the interactive
effect of 50 mM IBA (5 s) 9 3 year old long shoot from female tree (83% ± 4.1).
Cuttings planted in soil: sand medium in polythene bags showed earlier rooting response
(12 weeks) than cuttings planted in raised nursery beds (24 weeks). Overall, the findings of
this study suggest that 0.5 mM IBA treatment is suitable for enhancing adventitious
rooting in 1 year old long and dwarf shoots of male and female trees. IBA at higher doses is
suitable for enhancing the rooting percentage of 2 and 3 year old long shoots from female
tree. This study provides a significant lead towards the development of a simple and
inexpensive technique for large scale propagation, aforestation of elite genotypes and
raising of bush type plantation under ex-situ conditions.
 
Date 2008
 
Type Article
PeerReviewed
 
Format application/pdf
 
Identifier http://ihbt.csircentral.net/145/1/2008_Variation217_224.pdf
Kaul, Kiran (2008) Variation in rooting behavior of stem cuttings in relation to their origin in Taxus wallichiana Zucc. New Forests, 36 (3). pp. 217-224.
 
Relation http://ihbt.csircentral.net/145/