Induction of secondary dormancy in seeds of Barbarea stricta and B. vulgaris by chlormequat and daminozide, and its termination by gibberellic acid.

Hintikka, V.

Germination in thc laboratory of seeds of Barbarea stricta and B. vulgaris was inhibited by 20-200 mg l-1 chlormequat chloride or daminozide. Seeds treated with chiormequat 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 Matricaria perforata, took place in the presence of chlormequat and daminozidc in concentrations of 5000-10000 mg l-1. The relevance of the results to the duration of seed dormancy in the soil is discussed.

GERMINATION; PLANT embryology; GARDEN yellowrocket; YELLOWROCKETS; DORMANCY in plants; SEED dormancy

Weed Research, 1988, Vol 28, Issue 1, p7

0043-1737

Academic Journal

10.1111/j.1365-3180.1988.tb00779.x