Despite the economic potential of Atuna racemosa, its morphological measurements, seed storage behaviour and detailed seedling growth and development are not yet established. This study characterised the seed morphology, storage behaviour and germination pattern of A. racemosa
seeds. Three hundred mature fruits from three accessions of the germplasm collection of the Institute of Crop Science, University of the Philippines Los Baños, were characterised. Seeds were morphologically characterised, tested for viability at fresh (~ 65%) and dry (~ 12%) moisture
contents, planted and observed regularly for growth and development. A. racemosa seeds are relatively large in size with a length of 48.88 ± 1.56 mm, width of 37.56 ± 0.85 mm and thickness of 33.75 ± 0.92 mm. They are obovate to orbicular in shape. When dried, seeds
lost their viability completely indicating recalcitrant seed storage behaviour. Framed according to the extended BBCH scale, the germination pattern is identified as cryptocotylar hypogeal; however, distinct and non-plastic features are present, such as formation of seven cataphylls prior
to true leaf unfolding (BBCH 11) and emergence of radicle (BBCH 05) at the peduncle end of the seed.
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SEED STORAGE BEHAVIOUR;
Document Type: Research Article
December 1, 2018
This article was made available online on September 21, 2018 as a Fast Track article with title: "Seed morphology, storage behaviour and germination pattern of Atuna racemosa ".
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