Premium
Effects of Stratification, Gibberellic acid and Germination Temperature on the Germination of Betula nana
Author(s) -
Junttila Olavi
Publication year - 1970
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1970.tb06432.x
Subject(s) - gibberellic acid , germination , stratification (seeds) , dormancy , seed dormancy , distilled water , biology , horticulture , botany , chemistry , chromatography
Abstract Experiments were carried out with three seed lots of Betula nana collected in 1967 from different localities in Norway. Seeds were stratified for 0‐20 days in dark at +2‐+3 °C on filter papers moistened with distilled water, or treated with solution of GA 3 for 24 h at room temperature, and then moved into special germination boxes that were placed in different temperature conditions. All the seed lots had conditional dormancy. Quantitatively, the dormancy was different in the different seed lots (pronenances), but there were no qualitative difference in the reaction to stratification gibberellic acid and to germination temperature. Differences between seed lots may have been due to different stage of seed development. The dormancy was deepest at low temperatures(12 and 15°C) decreasing gradually with increasing temperature (to 24 °C). The dormancy was effectively broken by a short stratification (from 5 to 15 days), and by treatment with gibberellic acid. The deeper the dormancy and the lower the germination temperature the longer the stratification that was needed for maximum germination. Similarly, the concentration of GA 3 needed for maximum germination increased with decreasing temperature and with increasing dormancy.