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Effects of plant growth regulators applications on induction of lateral branching in Oregon Spur apple nursery trees

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Title Effects of plant growth regulators applications on induction of lateral branching in Oregon Spur apple nursery trees
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Creator KL Kumawat, WH Raja, DB Singh, L Chand, J Mir, KM Rai, SN Kirmani
 
Subject Malus domestica, plant growth regulators, 6-benzyladenine, gibberellic acid
 
Description Not Available
The study presents the influence of 6-benzayladenine alone and in combination with gibberellic acid on
growth and lateral branching of one-year-old ‘Oregon Spur’ apple nursery trees grafted on MM-106 rootstock.
Different concentrations of BA and BA+GA3
(200, 300, 400, 500, 600 and 700 ppm) were applied three times at
one week interval during second vegetative growth. Investigation reveal that Oregon Spur have strong apical
dominance and plant applied with growth regulators resulted in a significant increase in number of feathers
(0.58 to 6.18 per tree) compared to untreated control (0.18 per tree). However, BA alone has more significant
effect on number of feathers (1.45 to 6.18 per tree) than BA+GA3 (0.58 to 4.35 per tree). Maximum number of
feathers (6.18 per tree) has been obtained with 500 ppm BA treatment. This treatment also resulted in more
uniform feather length (2.58 short and 2.55 medium length lateral branches per tree) and correct distribution
of feathers along the trunk (20.63 cm branching zone) with appropriate average feathers crotch angle (54.74°
from vertical). Furthermore, this treatment resulted in 100 per cent feathered trees compared to none in control
and 2.88 trunk and mean feather diameter ratio compared to 1.54 in control. Some treatments with BA had a
negative influence on the tree height. Whereas, most treatments increased trunk diameter and crotch angle
compared to control.
Not Available
 
Date 2021-07-15T00:15:23Z
2021-07-15T00:15:23Z
2020-03-01
 
Type Research Paper
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/48034
 
Language English
 
Relation Not Available;
 
Publisher Indian Academy of Horticultural Sciences