Banana Fungus Origin Revealed

A fungal disease that is plaguing banana plants around the world originated in South East Asia.

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WIKIMEDIA COMMONS, DAVID MONNIAUX

Black leaf streak disease is a debilitating infection that for the last 50 years has been attacking plantain and banana plants, delaying harvest and affecting fruit quality by impeding leaf photosynthesis and causing fruit to ripen prematurely. Mycosphaerella fijiensis, the fungus responsible for black leaf streak disease, emerged in the 1960s, and now has a global reach, affecting all continents where bananas are grown.

A new study in Molecular Ecology traces the fungus’ genetic heritage to identify its area of origin—South East Asia—and suggest potential scenarios for the fungus’s introduction to Africa and the Americas. The study’s results also highlight apparently different modes of introduction of M. fijiensis to Africa and the Americas, suggesting that the fungus in Africa originated from one location in the ...

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