Indian Journal of Agricultural Research

  • Chief EditorT. Mohapatra

  • Print ISSN 0367-8245

  • Online ISSN 0976-058X

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Indian Journal of Agricultural Research, volume 50 issue 5 (october 2016) : 487-490

Effect of growth retardants on growth, flowering and physiological characteristics of olive cultivar Leccino under rain-fed conditions of Himachal Pradesh, India

Arun Kumar*1, N Sharma
1<p>Department of Fruit Science Dr Y S Parmar University of Horticulture &amp; Forestry,&nbsp;Nauni, Solan-173 230, Himachal Pradesh, India.</p>
Cite article:- Kumar*1 Arun, Sharma N (2016). Effect of growth retardants on growth, flowering and physiological characteristics of olive cultivar Leccino under rain-fedconditions of Himachal Pradesh, India . Indian Journal of Agricultural Research. 50(5): 487-490. doi: 10.18805/ijare.v0iOF.10778.

A field experiment was carried out during two consecutive years to ascertain the influence of paclobutrazol and cycocel on growth, cropping and water relations in olives. The trial was undertaken at the Olive Development Centre, Kigus, Mandi, Himachal Pradesh. In this experiment eight treatments viz., PP333 at 2 and 4 g a.i. tree-1 applied once in November or December as soil drench and cycocel at 1000, 2000 and 3000 ppm applied as foliar spray each year, two weeks after flowering to the trees of olive cultivar Leccino, with three replications in a randomized block design. Growth retardants have a great potential on controlling the growth, water relations and improving cropping parameters in rain fed conditions. During the study, PP333  at 4 g a.i tree-1 when applied in November as soil drench decreased growth (15.69 cm), length of internodes (1.84 cm), leaf area (4.60 cm2), stomatal size (13.61 µm), water potential (-15.69 bar), transpiration rate (0.160 m mol m-2 s-1), endogenous GA3 (9.61hg/g fresh weight), stomatal conductance (1.51 mol m-2s-1) and increased leaf thickness (0.62 cm), leaf chlorophyll content (3.05 mg/g fresh weight), photosynthesis (24.62 µ mol m-2 s-1), osmoprotectants that is. Proline (2717 µg/g) and ABA (60.74 (hg/g fresh weight), flowering intensity (0.65 %) and fruit set (7.57%), and thus might be helpful in mitigating water stress under rain fed conditions.

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