Germination in Helichrysum aureonitens (Asteraceae): Effects of temperature, light, gibberellic acid, scarification and smoke extract
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چکیده
منابع مشابه
effect of gibberellic acid and scarification on seed germination in four almond species
almonds belong to prunus genus, which is related to rosaceae family. it has close relatives with different species of stoned fruits. one of the main reasons for the long period of seed germination in prunus is compound dormancy, such as the external seed cover as physical dormancy and embryo dormancy causes physiological dormancy. seed stratification and treatments with various hormones are use...
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The aim of this study was to examine some in vivo and in vitro cardiovascular effects of Helichrysum ceres leaf ethanolic extract (HCE) in experimental animal paradigms. The acute effects of HCE on blood pressure were studied in anaesthetised normotensive male Wistar rats challenged with intravenous hypotonic saline infusion after a 3.5-hour equilibration for four hours of one-hour control, 1.5...
متن کاملKarrikins discovered in smoke trigger Arabidopsis seed germination by a mechanism requiring gibberellic acid synthesis and light.
Discovery of the primary seed germination stimulant in smoke, 3-methyl-2H-furo[2,3-c]pyran-2-one (KAR1), has resulted in identification of a family of structurally related plant growth regulators, karrikins. KAR1 acts as a key germination trigger for many species from fire-prone, Mediterranean climates, but a molecular mechanism for this response remains unknown. We demonstrate that Arabidopsis...
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The seeds of lettuce (Lactuca sativa L. cv. Grand Rapids) germinate in darkness at 25 C when treated by gibberellic acid (GA(3)) for 1 hour following 2 hours of imbibition. The time of GA(3) application influences the rate and the final percentage of seeds that germinate. In contrast, red light illumination given at different times affects only the rate and not the final germination percentage....
متن کاملEFFECTS OF TEMPERATURE AND LIGHT ON DIFFERENT WILD MUSTARD (SINAPIS ARVENSIS) ECOTYPES GERMINATION
In order to investigate light and temperature effects on germination of different ecotypes of wild mustard (Sinapis arvensis L.), seeds were collected from four regions: Fars, West Azarbayjan, Khouzestan and Mazandaran Provinces. Seed size and weight, difference of dormancy state among the ecotypes, seed germination in differential light and temperature conditions were studied. The results sho...
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ژورنال
عنوان ژورنال: South African Journal of Botany
سال: 1997
ISSN: 0254-6299
DOI: 10.1016/s0254-6299(15)30687-6