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1 November 2006 Factors affecting turnipweed (Rapistrum rugosum) seed germination in southern Australia
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Abstract

Experiments were conducted on the seed of turnipweed collected from southern Australia. Seed germinated over a range of temperatures (25/15, 20/12, and 15/9 C) under both light/dark and dark conditions. Regardless of the light condition, germination of naked seed (63 to 88%) was greater than the seed in intact silique (0 to 13%). Seed germination was relatively unaffected (greater than 60%) at a low level of salinity (80 mM NaCl), and some germination occurred even at 160 mM NaCl (11%). Seed germination decreased as osmotic potential decreased from 0 to −1.0 MPa; however, some germination occurred even at an osmotic potential of −1.0 MPa (22%). Seed germination was greater than 76% over a pH range of 4 to 10. Seedling emergence of turnipweed was greater (60%) for seed buried at 1 cm than on the soil surface (23%). No seedlings emerged from seed buried at 5 cm. Information gained in this study will be important in developing a better understanding of the requirements for turnipweed germination and emergence.

Nomenclature: Turnipweed, Rapistrum rugosum (L.) All. RASRU.

Bhagirath S. Chauhan, Gurjeet Gill, and Christopher Preston "Factors affecting turnipweed (Rapistrum rugosum) seed germination in southern Australia," Weed Science 54(6), 1032-1036, (1 November 2006). https://doi.org/10.1614/WS-06-060R1.1
Received: 27 March 2006; Accepted: 1 July 2006; Published: 1 November 2006
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