THE EFFECT OF SUMMER SPRAYS OF GROWTH REGULATORS ON BUD BREAK OF APPLE TREES IN THE SUBSEQUENT SPRING

1987 ◽  
pp. 119-124 ◽  
Author(s):  
A. Ebert ◽  
F. Denardi ◽  
L.F. Hough
Keyword(s):  
Growth Regulators ◽  
Bud Break ◽  
Apple Trees

scholarly journals Assessment of In-vitro culture through Nodal explants of Dendrocalamus hamiltonii

2021 ◽  
Vol 2 (1) ◽  
pp. 130-133
Author(s):  
Abha Jha ◽  
◽  
Sunila Das ◽  
Keyword(s):  
Experimental Study ◽  
Growth Regulators ◽  
In Vitro Regeneration ◽  
Shoot Multiplication ◽  
Growth Hormones ◽  
Nodal Explants ◽  
Bud Break ◽  
Multiplication Rate ◽  
Dendrocalamus Hamiltonii

The present experimental study was aimed to overcome the traditional methods of propagation that limit the number of propagules by in-vitro regeneration through nodal explants of Dendrocalamus hamiltonii with a comparative study of growth regulators during the shooting and rooting process. Dendrocalamus hamiltonii is distributed from the Himalayas (Nepal) to the northern part of Burma. Collection of explants was done from different selected sites of CPTs. There was the use of HgCl2 and Ca (OCl)2 as sterilizing agents in different concentrations and its effect was visualized during the sprouting stage. Culm explants were cultured in a bottle containing White media (Wm) supplemented with BA and Kinetin for sprouting and IAA, IBA, NAA for rooting. There is also the use of IAA+IBA+NAA in combined form as a supplementary solution 0.1% HgCl2 treatment for 20-minute results into77.80% aseptic buds and 72% bud -break. Among the used growth-hormones, BA with concentration 0.25mg/l and 0.50mg/l respectively were appropriate for shoot-multiplication rate, 4.01±0.3 and 4.3±0.4 were ideal observation incorporation with BA (1.00mg/l) and BA (1.50mg/l) respectively. Maximum sprouting rate14.77±3.37with application of BA (2.00mg/l) and maximum shoot length4.3±0.4 is observed at BA (1.50mg/l). The applications of rooting hormone IAA+IBA+NAA in the concentration of 1.0 mg/l results in 72.5±0.3(rooting) and 11.1±0.3 (av. No. of the root).

Seasonal changes in cold hardiness, sucrose and sorbitol in apple trees treated with plant growth regulators

1992 ◽  
Vol 67 (3) ◽  
pp. 429-435 ◽  
Author(s):  
W. K. Coleman ◽  
E. N. Estabrooks ◽  
M. O’hara ◽  
J. Embleton ◽  
R. R. King
Keyword(s):  
Plant Growth ◽  
Plant Growth Regulators ◽  
Growth Regulators ◽  
Seasonal Changes ◽  
Cold Hardiness ◽  
Apple Trees

scholarly journals Experimental approach in apple tree nutrition

2003 ◽  
Vol 9 (2) ◽  
Author(s):  
T. Kállay ◽  
E. Szűcs
Keyword(s):  
Growth Regulators ◽  
Experimental Approach ◽  
Apple Tree ◽  
Weather Conditions ◽  
Physiological Status ◽  
Apple Trees ◽  
Bitter Pit ◽  
Apple Fruits ◽  
Npk Fertilization

Authors present synthesis of experimental work, performed in the last decades, for better understanding nutritional behaviour of apple trees and related problems in fruit quality. There were evidences supporting possible deteriorating role of potassium in feeble physiological status of apples, if applied in excess. More intensive studies proved that higher potassium uptake into leaves and fruits might be also the result of increased sink power of individual fruits. Nevertheless early senescence of apples during storage and also sensibility to bitter pit were successfully related to the increased sink power of fruits, casual relations in excessive NPK fertilization, although increase in sink power need further investigations. Impaired weather conditions during early development of fruits, hostile orchard practices in pruning, thinning, irrigation and also unskilled application of growth regulators may also contribute in the enhancement of sink power and in weakened physiological status of apple fruits.

scholarly journals Application of gibberellin and cytokinin in crown formation of apple trees

2015 ◽  
Vol 26 (2) ◽  
pp. 257-264
Author(s):  
H. Plich ◽  
L. S. Jankiewicz
Keyword(s):  
Growth Regulators ◽  
Apple Trees ◽  
Crown Formation

Lanolin paste containing a mixture of gibberellin and cytokinin was smeared in February and March on the 8 buds chosen to form scaffold branches. The treated buds developed 5-10 days earlier than those smeared with lanolin alone. They formed shoots longer than those of the control trees. The applied growth regulators had no influence upon the crotch angles.

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