Ray Achene Polymorphism and Germination in Ragweed Parthenium (Parthenium hysterophorus)
- 1 September 1988
- journal article
- weed biology-and-ecology
- Published by Cambridge University Press (CUP) in Weed Science
- Vol. 36 (5), 566-567
- https://doi.org/10.1017/s0043174500075408
Abstract
Ragweed parthenium (Parthenium hysterophorusL. #3PTNHY) growing at six localities between 28°46′N and 13°O'N latitudes in India produced polymorphic ray achenes that varied in size and weight. Frequency of small achenes (1.9 to 2.2 mm) was higher at lower latitude (13°O'N) and that of large achenes (2.5 to 2.8 mm) at higher latitude (28°46′N). Achene weight was positively correlated with its germination percentage. Large-heavy achenes showed better germination than small-light ones.Keywords
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