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Induction of secondary dormancy in seeds of Barbarea stricta and B. vulgaris by chlormequat and daminozide, and its termination by gibberellic acid
Author(s) -
HINTIKKA V.
Publication year - 1988
Publication title -
weed research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.693
H-Index - 74
eISSN - 1365-3180
pISSN - 0043-1737
DOI - 10.1111/j.1365-3180.1988.tb00779.x
Subject(s) - daminozide , chlormequat , gibberellic acid , dormancy , seed dormancy , germination , clopyralid , biology , botany , gibberellin , agronomy , chemistry , horticulture , weed control , plant growth
Summary Germination in the laboratory of seeds of Barbarea stricta and B. vulgaris was inhibited by 20–200 mg l −1 chlormequat chloride or daminozide. Seeds treated with chlormequat and then washed with water and kept on moist quartz sand remained dormant for up to 1 year, but dormancy could be broken at any time by treatment with gibberellic acid. Similar results were obtained with Capsella bursa‐pastoris and Thlaspi arvense. In contrast, germination of other weed species, such as Spergula arvensis and Matrkaria perforata , took place in the presence of chlormequat and daminozide in concentrations of 5000–10000 mg 1 −1 . The relevance of the results to the duration of seed dormancy in the soil is discussed.