As plant species spread north and south from their nutrient - rich tropical beginnings, the fine tips of their roots became narrower and more widespread to help them explore increasingly poor soil for vital nutrients, according to a Feb. 21 study in the journal Nature led by researchers from Princeton University and the Chinese Academy of Sciences (CAS) in Beijing. (sciencedaily.com)
The mushroom mainly forms the protein in its pileus, i.e. the part of the fruiting body visible above ground and in the dense fungal net around the tips of the roots. (sciencedaily.com)
In Arabidopsis, as in most plants, there is a specific zone near the tip of the root where stem cells transition from a stage of proliferation to one where they differentiate into specific tissue types. (scientificamerican.com)