This study investigated the effects of smoke-water (1:500 v/v) and karrikinolide (KAR1) (10-7 M) on seed germination and seedling growth of a multipurpose tree species, Bauhinia variegata. The species is used for food, fodder, apiculture, fuel, fibre, timber,
gum, tannin, medicine and ornamental purposes. Both treatments showed a significant increase in percentage germination under alternating light conditions at 25°C. The smoke-treated seedlings which had developed by 21 days were longer than the untreated ones. Smoke-water elicited the best
growth performance of B. variegata seedlings after eight weeks under greenhouse conditions. Phytochemical analysis showed that flavonoid and total phenolic contents were significantly reduced in smokewater- and KAR1-treated seedlings. There was also a significant decline
in the levels of total sugars and proteins with these treatments, indicating faster utilisation and mobilisation of these reserves which could account for the better growth performance. These results can be attributed to a significant increase in the α-amylase activity in smoke-water-
and KAR1-treated seedlings when harvested after eight weeks. KAR1 treatment was not effective in improving the overall morphological growth of B. variegata seedlings. Smoke-water can be integrated as one of the propagation methods to improve seed germination and
growth performance of B. variegata seedlings.
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Document Type: Research Article
July 1, 2017
This article was made available online on July 24, 2017 as a Fast Track article with title: "Seed germination and seedling growth of Bauhinia variegata in response to smoke-water and synthesised smoke-isolated karrikinolide (KAR1)".
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Seed Science and Technology (SST) is one of the leading international journals featuring original papers and review articles on seed quality and physiology as related to seed production, harvest, processing, sampling, storage, distribution and testing. This widely recognised journal is designed to meet the needs of researchers, advisers and all those involved in the improvement and technical control of seed quality.
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