Full TGIF Record # 5758
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Author(s):Roberts, E. H.; Benjamin, S. K.
Author Affiliation:Dep. Agric. and Hort., Univ. Reading, Earley Gate, Reading RG6 2AT, UK
Title:The interaction of light, nitrate and alternating temperature on the germination of Chenopodium album, Capsella bursa-pastoris and Poa annua before and after chilling
Source:Seed Science and Technology. Vol. 7, No. 3, 1979, p. 379-392.
Keywords:TIC Keywords: Capsella bursa-pastoris; Chenopodium album; Poa annua; Seeds; Germination
Abstract/Contents:The maximum stimulatory effect of chilling imbibed seeds on subsequent germination of the three species investigated was obtained after a relatively short period, usually within seven days. In Chenopodium album and especially Capsella bursa-pastoris prolonged periods of chilling could result in some induction of secondary dormancy. Exposure to light during chilling was particularly beneficial to C. bursa-pastoris. Millimolar KNO3 during chilling had little effect on any of the species except that it diminished the beneficial effect of chilling on C. bursa-pastoris. If unchilled seeds were set to germinate, either light or nitrate was slightly stimulatory on its own in all species, as was alternating temperature in Poa annua. Effects of all three factors, when combined, were roughly additive in all species. After chilling, however, positive light x nitrate interactions were common; these were particularly marked in C. album and C. bursa-pastoris after chilling in the dark. Second-order positive interactions (light X alternating temperature X nitrate) were less common, but often occurred after longer periods of chilling in C. album. Negative interactions of any kind were rare. Generally highest germination in all species was obtained after chilling and when all three potentially stimulatory factors, light, alternating temperature and nitrate, were applied during the germination tests. The implications of the responses to all these factors, which presumably affect field germination, are briefly discussed.
Language:English
References:9
Note:Summary appears in French and German
Geographic Terms:UK
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Roberts, E. H., and S. K. Benjamin. 1979. The interaction of light, nitrate and alternating temperature on the germination of Chenopodium album, Capsella bursa-pastoris and Poa annua before and after chilling. Seed Sci. Technol. 7(3):p. 379-392.
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