Plant which Increases Water in Soils

I just read an article that sounds like it has great possibilities for permies in Africa. 

It appears that there is a shrub native to africa, Guiera senegalensis.  I gather it is a popular medicinal plant.  The article claims that planting this plant with millet  led to a 900% increase in food production.  It appears that the guiera roots reach down 30 or 40 feet deep for water.  

At night, when the stomata close and photosynthesis stops, the roots near the surface release water into the upper soil, where the millet can reach it.  
I claim no expertise or knowledge here, but read the article and make your own evaluation and a soil microbiologist, friend of mine says this is but one of several known plants to have this capability. 
This sounds like a wonderful plant and it's like may hold a permanent answer to the drought problems of Australia, if researched 
Read More:www.ineffableisland.com/2018/11/how-one-tough-shrub-could-help-fight.html
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