EJPAU 2006. Gonkiewicz A. , Nosal K. ANATOMICAL CHANGES IN PLUM FRUIT <I>Prunus domestica </I>L. AFTER FRUIT THINNING USING POTASSIUM SALT OF ALPHA-NAPHTALENEACETIC ACID

Electronic Journal of Polish Agricultural Universities (EJPAU) founded by all Polish Agriculture Universities presents original papers and review articles relevant to all aspects of agricultural sciences. It is target for persons working both in science and industry,regulatory agencies or teaching in agricultural sector. Covered by IFIS Publishing (Food Science and Technology Abstracts), ELSEVIER Science - Food Science and Technology Program, CAS USA (Chemical Abstracts), CABI Publishing UK and ALPSP (Association of Learned and Professional Society Publisher - full membership). Presented in the Master List of Thomson ISI.

2006
Volume 9
Issue 4

Topic:

Horticulture

ELECTRONIC
JOURNAL OF
POLISH
AGRICULTURAL
UNIVERSITIES

Gonkiewicz A. , Nosal K. 2006. ANATOMICAL CHANGES IN PLUM FRUIT Prunus domestica L. AFTER FRUIT THINNING USING POTASSIUM SALT OF ALPHA-NAPHTALENEACETIC ACID, EJPAU 9(4), #50.
Available Online: http://www.ejpau.media.pl/volume9/issue4/abs-50.html

ANATOMICAL CHANGES IN PLUM FRUIT PRUNUS DOMESTICA L. AFTER FRUIT THINNING USING POTASSIUM SALT OF ALPHA-NAPHTALENEACETIC ACID

Aleksander Gonkiewicz, Kazimierz Nosal
Department of Pomology, University of Agriculture in Cracow, Poland

ABSTRACT

The aim of auxin application in thinning of flowers and young fruits is to reduce the number of set fruits and to obtain a high quality fruit yield. Six-year old plum trees ‘Stanley’ and ‘Iroquois’ cultivars treated with a solution of potassium salt of alpha-naphtaleneacetic acid (NAA) after blooming were used in the experiment. The applied concentrations varied from 30 to 160 mg NAA l^-1. Microscopic preparations of flowers and young fruits were made using fluorescence and paraffin methods. There was noted a slight stimulating effect of NAA treatment on the fertilization process. It was also found that the applied auxin induced callose saturation and clogging up of conductive bundles and the chalazal part of the ovule. The inhibition of assimilate translocation to the ovule due to the clogging up of the chalazal part brought about an inhibition in endosperm development and resulted in embryo degeneration.

Key words: callose, NAA, plum, thinning.

Aleksander Gonkiewicz
Department of Pomology,
University of Agriculture in Cracow, Poland
29 Listopada 54, 31-425 Cracow, Poland
email: agonkiewicz@ar.krakow.pl

Kazimierz Nosal
Department of Pomology,
University of Agriculture in Cracow, Poland
29 Listopada 54, 31-425 Cracow, Poland

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