Journal of Food, Agriculture and Environment

Effects of drying on germination rate of pecan seeds

Author(s):

Zeynel Dalkılıç

Recieved Date: 2013-07-06, Accepted Date: 2013-10-30

Abstract:

The aim of this study was to determine the germination rate of pecan (Carya illinoensis (Wangenh.) K. Koch) cv. Mahan seeds in two consecutive years. The seeds were harvested from a single tree on 26 October 2010 and 24 November 2011. The seeds were stored at room conditions (16.0°C and 82.4% RH). Thirty seeds were cracked and sown every day starting on 26 October 2010 (total 54 days) in 1 L plastic pots containg peat and on 24 November 2011 (total 36 days) in 1 L plastic pots containing perlite. The first plantlet emergence was observed 33 days after harvest (28 November 2010) and 95 days after harvest (27 February 2012) in 2010 and 2011 experiments, respectively. The number of emerged seeds were counted and recorded as germination until 26 February 2011 (44 times) and 28 May 2012 (62 times). From the germination data of the pecan seeds, the highest germination rates G=76.67% (30 October 2010) and 43.33% (25 November 2011), mean germination time t =107.83 (29 October 2010) and 158.00 (27 December 2011) days, coefficient of variance of germination time CV_t =33.33% (03 November 2010) and 6.90% (24 November 2011), mean germination rate v =0.0175 (09 November 2010) and 0.0098 (25 November 2011) (day^-1), uncertainty U=1.26 (27 October 2010) and 1.72 (24 November 2011) (bit), and synchrony Z=0.05 (26 October 2010) and 0.00 (all sowing dates) have been obtained from the 2010 and 2011 experiments, respectively. The highest germination ratio was obtained from the seeds sown four (2010) and one (2011) day(s) after harvest. Decrease in seed germination rate in accordance with drying in unheated-laboratory conditions supports the recalcitrant nature of pecan seeds. 

Keywords:

Carya illinoensis, laboratory conditions, peat, perlite, recalcitrant and seed germination decrease

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Journal: Journal of Food, Agriculture and Environment
Year: 2013
Volume: 11
Issue: 3&4
Category: Agriculture
Pages: 879-882

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