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Purple witchweed

Striga hermonthica

Purple witchweed
Photo: United States Department of Agriculture: Agricultural Research Service, Public domain
Family
Orobanchaceae (Orobanch family)
Grows as
Annual
Water
Likes moisture
Native range
Africa
Climate
seasonally dry tropical

About

Striga hermonthica, commonly known as purple witchweed or giant witchweed, is a hemiparasitic plant that belongs to the family Orobanchaceae. It is devastating to major crops such as sorghum (Sorghum bicolor) and rice (Oryza sativa). In sub-Saharan Africa, apart from sorghum and rice, it also infests maize (Zea mays), pearl millet (Pennisetum glaucum), and sugar cane (Saccharum officinarum).

Striga hermonthica has undergone horizontal gene transfer from Sorghum to its nuclear genome. The S. hermonthica gene, ShContig9483, is most like a Sorghum bicolor gene, and additionally shows significant but lesser similarity to a gene from Oryza sativa. It shows no similarity to any known eudicot gene.

Other Striga plants

Asiatic witchweed · Cowpea witchweed · Witchweed

Text excerpted from the Wikipedia article Striga hermonthica by its contributors, under CC BY-SA 4.0; the excerpts are shared under the same licence.

Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.

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